2010 Cadillac Truck SRX FWD V6-3.0L Page 1157

2010 Cadillac Truck SRX FWD V6-3.0L Page 1157

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P124B

DTC P1248, P1249, P124A, P124B, P124C, or P124D (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

2010 Cadillac Truck SRX FWD V6-3.0L Page 854

2010 Cadillac Truck SRX FWD V6-3.0L Page 854

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K19 suspension control module.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K19

suspension control module.

5. Verify the scan tool Vertical Body Acceleration parameter is less than -3 m/s(2).

瀚慖f greater than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K19 suspension

control module.

6. Install a fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3.

7. Verify the scan tool Vertical Body Acceleration parameter is greater than 3 m/s(2).

瀚慖f less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K19 suspension control module.

8. If all circuits test normal, replace the B162 vertical body acceleration sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Electronic Suspension Front Vertical Accelerometer Replacement - Upper (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Acceleration Sensor/Service and Repair/Electronic Suspension Front Vertical Accelerometer

Replacement - Upper)

* Electronic Suspension Rear Position Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for suspension control module replacement, setup

and programming

C0670

DTC C0670 or C0675

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC C0670 02

- Left Front Acceleration or Position Sensor Circuit Short to Ground

DTC C0670 05

- Left Front Acceleration or Position Sensor Circuit High Voltage/Open

DTC C0670 0A

- Left Front Acceleration or Position Sensor Circuit Too Slow Transitions

DTC C0675 02

- Right Front Acceleration or Position Sensor Circuit Short to Ground

DTC C0675 05

- Right Front Acceleration or Position Sensor Circuit High Voltage/Open

DTC C0675 0A

- Right Front Acceleration or Position Sensor Circuit Too Slow Transitions

Diagnostic Fault Information

2010 Cadillac Truck SRX FWD V6-3.0L Page 2098

2010 Cadillac Truck SRX FWD V6-3.0L Page 2098

瀚慖f less than the specified range, replace the wiring harness.

4. If all circuit test normal, perform the control solenoid valve inspection. Refer to Control Solenoid Valve Inspection (M36 and MXE) (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 -

Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement).

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning).

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Wiring Harness/Service and Repair).

6T70/6T75 - Automatic Transmission

DTC P2719-P2721

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P2719

- Clutch Pressure Control (PC) Solenoid 4 System Performance

DTC P2720

- Clutch Pressure Control (PC) Solenoid 4 Control Circuit Low Voltage

DTC P2721

- Clutch Pressure Control (PC) Solenoid 4 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The clutch pressure control (PC) solenoid 4 is part of the control solenoid valve assembly which has no serviceable components. The normally low

PC solenoid 4 regulates and directs oil pressure to the 2-6 clutch regulator valve. Increasing PC solenoid 4 pressure, increases pressure to the 2-6

clutch regulator valve. The TCM varies the current to the PC solenoid 4 through a low side driver. Increasing the current to PC solenoid 4 increases

oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to PC solenoid 4 decreases oil pressure by opening the exhaust port.

PC solenoid 4 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive

current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected the HSD will reset.

Conditions for Running the DTC

P2719

* The engine speed is greater than 400 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* DTC P2719 has not set this ignition cycle.

P2720

* The engine speed is greater than 400 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

2010 Cadillac Truck SRX FWD V6-3.0L Page 1160

2010 Cadillac Truck SRX FWD V6-3.0L Page 1160

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P124C

DTC P1248, P1249, P124A, P124B, P124C, or P124D (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

2010 Cadillac Truck SRX FWD V6-3.0L Page 1166

2010 Cadillac Truck SRX FWD V6-3.0L Page 1166

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P0131

DTC P0131, P0132, P0137, P0138, P0151, P0152, P0157, P0158, P2A00, P2A01, P2A03, or P2A04 (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0131

- HO2S Circuit Low Voltage Bank 1 Sensor 1

DTC P0132

- HO2S Circuit High Voltage Bank 1 Sensor 1

DTC P0137

- HO2S Circuit Low Voltage Bank 1 Sensor 2

DTC P0138

- HO2S Circuit High Voltage Bank 1 Sensor 2

DTC P0151

- HO2S Circuit Low Voltage Bank 2 Sensor 1

DTC P0152

- HO2S Circuit High Voltage Bank 2 Sensor 1

DTC P0157

- HO2S Circuit Low Voltage Bank 2 Sensor 2

DTC P0158

- HO2S Circuit High Voltage Bank 2 Sensor 2

DTC P2A00

- HO2S Circuit Closed Loop Performance Bank 1 Sensor 1

DTC P2A03

- HO2S Circuit Closed Loop Performance Bank 2 Sensor 1

2010 Cadillac Truck SRX FWD V6-3.0L Page 1727

2010 Cadillac Truck SRX FWD V6-3.0L Page 1727

瀚慖f less than the specified range, test the wiring harness for internal short. If the circuit test normal, replace the Q23 Line Pressure Control

Solenoid Valve.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 1 X2 and also to the voltage supply circuit terminal 3

X2.

瀚慖f less than the specified range, replace the wiring harness.

4. If all circuit test normal, perform the Control Solenoid Valve Inspection (M36 and MXE) (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 - Automatic Transmission).

瀚慖f the inspection test normal, replace the valve body assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement) for

replacement, setup and programming.

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and

programming.

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Wiring Harness/Service and Repair) for replacement.

P0751

DTC P0751 or P0752

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0751

- Shift Solenoid (SS) 1 Valve Performance - Stuck Off

DTC P0752

- Shift Solenoid (SS) 1 Valve Performance - Stuck On

Circuit/System Description

The shift solenoid (SS) valve 1 is part of the control solenoid valve assembly. The SS valve 1 is a normally closed (NC) solenoid valve and controls

fluid to the clutch select valve 2. The solenoid operates by the transmission control module TCM opening or closing the ground circuit. With the

solenoid circuit grounded, solenoid on, the internal plunger moves and allows the metering ball to move away from the feed seat and against the

exhaust seat, creating signal fluid pressure. The signal fluid acts against the clutch select valve 2 to overcome the valve spring force, moving it to

the apply position.

Conditions for Running the DTC

P0751

* The ignition voltage is greater than 8.6 volts.

* The engine speed is 400 RPM or greater for 5.0 seconds.

* The throttle position signal is valid.

* The engine torque signal is valid.

* The output shaft speed is greater than 0 RPM or the throttle position is greater than 0.4 percent.

* The transmission fluid temperature is 0掳C (32掳F) or greater.

* No DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207,

P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, P042E, P0716, P0717, P0722, P0723, or P182E.

2010 Cadillac Truck SRX FWD V6-3.0L Page 1163

2010 Cadillac Truck SRX FWD V6-3.0L Page 1163

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P124D

DTC P1248, P1249, P124A, P124B, P124C, or P124D (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

2010 Cadillac Truck SRX FWD V6-3.0L Page 1757

2010 Cadillac Truck SRX FWD V6-3.0L Page 1757

瀚慖f less than the specified range, replace the wiring harness.

4. If all circuit test normal, perform the Control Solenoid Valve Inspection (M36 and MXE) (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 - Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement) for

replacement, setup and programming.

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and

programming.

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Wiring Harness/Service and Repair) for replacement.

P0815

DTC P0815, P0816, or P0826

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0815

- Upshift Switch Circuit

DTC P0816

- Downshift Switch Circuit

DTC P0826

- Up and Down Shift Switch Circuit

Diagnostic Fault Information

Circuit/System Description

When the shift lever is placed in manual mode (M) this activates the driver shift request (DSR), also known as the tap shift function. The DSR

allows the vehicle operator to shift gears by pressing the plus (+) button for an upshift or the minus (-) button for a downshift. A 12 volt signal

circuit is provided by the body control module (BCM) to the plus or minus buttons. When a plus or minus button is pressed, a corresponding

voltage drop occurs across the resistor network embedded in the switches. This voltage drop is monitored by the transmission control module

(TCM). The TCM will command the upshift or downshift providing the operating conditions are correct.

Conditions for Running the DTC

P0815 or P0816

* No DTCs P0815, P0816, P0826, P1761, P182E, P1876, P1877, or P1915.

* The time since the range change is greater than 1 second.

* The engine speed is 400 RPM or greater for 5 seconds.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 489

2010 Cadillac CTS Sedan AWD V6-3.6L Page 489

瀚慖f less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the CIM.

瀚慖f greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the CIM.

5. Ignition ON, test for 9.5-10.5 V between the keypad supply voltage circuit terminal 12 and ground.

瀚慖f less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal,

replace the CIM.

瀚慖f greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the CIM.

6. If all circuits test normal, test or replace the button assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Inside Rearview Mirror Replacement (See: Body and Frame/Mirrors/Service and Repair/Inside Rearview Mirror Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for CIM replacement, setup, and programming

B2485

DTC B2485

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provide an overview of each diagnostic category.

DTC Descriptors

DTC B2485 02

- Wireless Communication Antenna Circuit Short to Ground

DTC B2485 04

- Wireless Communication Antenna Circuit Open Circuit

Circuit/System Description

The Bluetooth (R) antenna is a small fixed antenna connected directly to the communication interface module (CIM) and is used to send and

receive signals from a Bluetooth (R) enabled cellular phone. The antenna utilizes no cabling and is not external to the vehicle.

Conditions for Running the DTC

* Ignition ON.

* Battery voltage must be between 9-16 V.

* The CIM tests the antenna once every second.

Conditions for Setting the DTC

B2485 02

The CIM detects a short to ground in the Bluetooth (R) antenna.

B2485 04

The CIM detects an open/high resistance in the Bluetooth (R) antenna.

Actions Taken When the DTC Sets

* The OnStar (R) status LED turns red.

* Bluetooth (R) functionality is disabled.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1157

2010 Cadillac Truck SRX AWD V6-3.0L Page 1157

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P124B

DTC P1248, P1249, P124A, P124B, P124C, or P124D (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 854

2010 Cadillac Truck SRX AWD V6-3.0L Page 854

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K19 suspension control module.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K19

suspension control module.

5. Verify the scan tool Vertical Body Acceleration parameter is less than -3 m/s(2).

瀚慖f greater than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K19 suspension

control module.

6. Install a fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3.

7. Verify the scan tool Vertical Body Acceleration parameter is greater than 3 m/s(2).

瀚慖f less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K19 suspension control module.

8. If all circuits test normal, replace the B162 vertical body acceleration sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Electronic Suspension Front Vertical Accelerometer Replacement - Upper (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Acceleration Sensor/Service and Repair/Electronic Suspension Front Vertical Accelerometer

Replacement - Upper)

* Electronic Suspension Rear Position Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and

Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for suspension control module replacement, setup

and programming

C0670

DTC C0670 or C0675

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC C0670 02

- Left Front Acceleration or Position Sensor Circuit Short to Ground

DTC C0670 05

- Left Front Acceleration or Position Sensor Circuit High Voltage/Open

DTC C0670 0A

- Left Front Acceleration or Position Sensor Circuit Too Slow Transitions

DTC C0675 02

- Right Front Acceleration or Position Sensor Circuit Short to Ground

DTC C0675 05

- Right Front Acceleration or Position Sensor Circuit High Voltage/Open

DTC C0675 0A

- Right Front Acceleration or Position Sensor Circuit Too Slow Transitions

Diagnostic Fault Information

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1000

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1000

瀚慖f less than the specified range, test the signal circuit for an open/high resistance or a short to ground. If the circuit/connections test

normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit/connections test normal, replace the K20

ECM.

7. Ignition OFF, connect the red lead of the J 38522 to the signal circuit terminal A at the B75B MAF/IAT sensor harness connector. Connect

the battery voltage supply to B+, and ground the black lead.

8. Set the J 38522 Signal switch to 5 V, the Frequency switch to 5K, and the Duty Cycle switch to Normal.

9. Ignition ON, observe the scan tool MAF Sensor frequency parameter. The parameter should be between 4,950-5,025 Hz.

瀚慖f the parameter is not within the specified range, replace the K20 ECM.

10. If all circuits/connections test normal, replace the B75B MAF/IAT sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LLT) (See: Powertrain Management/Computers and Control

Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LSA) (See: Powertrain Management/Computers and Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service

and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LF1) (See: Powertrain Management/Computers and

Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0102

DTC P0100-P0103 (w/LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0100

- Mass Air Flow (MAF) Sensor Circuit

DTC P0102

- Mass Air Flow (MAF) Sensor Circuit Low Frequency

DTC P0103

- Mass Air Flow (MAF) Sensor Circuit High Frequency

Diagnostic Fault Information

Circuit/System Description

The mass air flow (MAF) sensor is located in the air intake duct. The MAF sensor is an airflow meter that measures the amount of air that enters the

engine. The MAF sensor uses a hot film that is cooled by air flowing past the sensing film as air enters the engine. The amount of cooling is

proportional to the amount of the air flow. As the air flow increases, more current is required in order to maintain the hot film at a constant

temperature. The engine control module (ECM) uses the MAF sensor in order to provide the correct fuel delivery for all operating conditions. The

intake air temperature (IAT) sensor is integrated into the MAF sensor.

Conditions for Running the DTC

2010 Cadillac CTS Sedan AWD V6-3.6L Page 837

2010 Cadillac CTS Sedan AWD V6-3.6L Page 837

瀚慖f less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the

K20 ECM.

瀚慖f greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the K20 ECM.

4. If the circuits test normal, replace the appropriate B68 knock sensor.

P06B6 and P06B7

* Verify that the following DTCs are not set: DTC P0325, P0327, P0328, P0330, P0332 and P0333.

瀚慖f any of the DTCs are set, diagnose them first.

* DTCs P06B6 and P06B7 indicate an internal ECM circuitry failure. Replace the K20 ECM if no external knock sensor circuit issues exist.

Component Testing

1. Connect the DMM between the B68 knock sensor signal circuit terminal A and the B68 knock sensor signal circuit terminal B on the sensor

side of the appropriate B68 knock sensor harness connector.

2. Set the DMM to the 400 mV AC hertz scale and wait for the DMM to stabilize at 0 Hz.

Note: DO NOT tap on plastic engine components.

3. Tap on the engine block with a non-metallic object near the B68 knock sensor while observing the signal indicated on the DMM.

4. The DMM should display a fluctuating frequency while tapping on the engine block.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Knock Sensor Replacement - Bank 1 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 1)

* Knock Sensor Replacement - Bank 2 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P0008

DTC P0008 or P0009

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0008

- Engine Position System Performance Bank 1

DTC P0009

- Engine Position System Performance Bank 2

Circuit/System Description

The engine control module (ECM) tests for a misalignment between both camshafts on one bank of the engine and the crankshaft. The

misalignment would be at an idler sprocket for either bank or at the crankshaft. Once the ECM learns the position of both camshafts on one bank of

the engine, the ECM compares the learned values to a reference value. The ECM will set a DTC if both learned values for one bank of the engine

are exceeding a calibrated threshold in the same direction.

Conditions for Running the DTC

* DTC P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368,

P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 is not set.

* The engine is operating for greater than 50 seconds.

* The engine coolant temperature is between 0-95掳C (32-203掳F).

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1070

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1070

瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground. If the circuit/connections test normal, replace the

ECM.

瀚慖f greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit/connections test normal, replace

the ECM.

6. Connect a 3 A fused jumper wire between the signal circuit terminal B and ground. Verify the scan tool HO2S voltage parameter is less than

60 mV.

瀚慖f greater than the specified range, test the signal circuit for an open/high resistance. If the circuit/connections test normal, replace the

ECM.

7. Connect a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool HO2S

voltage parameter is less than 60 mV.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the

circuit/connections test normal, replace the ECM.

8. Verify that none of the following conditions exist:

* The HO2S is loose

* Lean or rich condition.

* Water intrusion in the HO2S harness connector

* Low or high fuel system pressure-Refer to Fuel System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel System Diagnosis).

* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool) (See: Powertrain

Management/Computers and Control Systems/Testing and Inspection/Component Tests and General

Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (with Special Tool))Alcohol/Contaminants-in-Fuel Diagnosis (without Special

Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General

Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (without Special Tool)).

* Fuel saturation of the evaporative emission (EVAP) canister

* Exhaust leaks near the HO2S

* Engine vacuum leaks

瀚慖f you find any of the above conditions, repair as necessary.

9. If all circuits/connections test normal, replace the appropriate HO2S.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0135

DTC P0135, P0141, P0155, or P0161

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0135

- HO2S Heater Performance Bank 1 Sensor 1

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2097

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2097

瀚慖f less than the specified range, test the appropriate relay coil control circuit for a short to ground. If the circuit tests normal, replace the

K20 ECM.

4. Command the appropriate cooling fan relay ON and OFF with a scan tool. The DMM should transition from OL when commanded OFF to

less than 1 V when commanded ON.

瀚慖f the circuit voltage does not correspond to the specified values, test the control circuit for an open/high resistance or for a short to

voltage. If the circuit tests normal, replace the K20 ECM.

5. If all circuits test normal, test or replace the appropriate KR20 relay.

Component Testing

1. Ignition OFF, disconnect the KR20 cooling fan relay.

2. Test for 70-110 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR20 cooling fan relay.

3. Measure the resistance between the terminals listed below:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

The DMM should display OL.

瀚慖f less than the specified range, replace the KR20 cooling fan relay.

4. Test the KR20 Fan Control Relay for less than 2 ohm between terminals 30 and 87A.

瀚慖f greater than the specified range, replace the fan control relay.

5. Connect a 20 A fused jumper wire between relay terminal 85 and B+. Connect a jumper wire between relay terminal 86 and ground. Test for

less than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR20 cooling fan relay.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Underhood Electrical Center or Junction Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and

Repair/Removal and Replacement/Underhood Electrical Center or Junction Block Replacement)

* Engine Coolant Fan Replacement (HP2) (See: Engine, Cooling and Exhaust/Cooling System/Radiator Cooling Fan/Service and

Repair/Engine Coolant Fan Replacement)Engine Coolant Fan Replacement (Non-HP2) (See: Engine, Cooling and Exhaust/Cooling

System/Radiator Cooling Fan/Service and Repair/Engine Coolant Fan Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for ECM replacement, setup, and programming

P0482

DTC P0480, P0481, or P0482 (with HP2)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0480

- Cooling Fan Relay 1 Control Circuit

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1953

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1953

瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal,

replace the K20 ECM.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the K20 ECM.

4. Connect a test lamp between the each of the ground circuits terminal A, and terminal B, and B+. The test lamp should illuminate on each

circuit.

瀚慖f the test lamp does not illuminate, test the suspected circuit for an open/high resistance.

5. If all circuits/connections test normal, replace the T8 ignition coil.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P2306

DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (w/LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0351

- Ignition Coil 1 Control Circuit

DTC P0352

- Ignition Coil 2 Control Circuit

DTC P0353

- Ignition Coil 3 Control Circuit

DTC P0354

- Ignition Coil 4 Control Circuit

DTC P0355

- Ignition Coil 5 Control Circuit

DTC P0356

- Ignition Coil 6 Control Circuit

DTC P2300

- Ignition Coil 1 Control Circuit Low Voltage

DTC P2301

- Ignition Coil 1 Control Circuit High Voltage

DTC P2303

- Ignition Coil 2 Control Circuit Low Voltage

DTC P2304

- Ignition Coil 2 Control Circuit High Voltage

DTC P2306

- Ignition Coil 3 Control Circuit Low Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1752

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1752

瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground or an open/high resistance. If the circuit tests

normal, replace the ECM.

9. If all circuits test normal, test or replace the MAP sensor.

Component Testing

Note: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the

Component Testing.

Skewed Sensor Test

1. Using the following steps and referencing the table below will determine if the MAP sensor is skewed.

2. Ignition ON, engine OFF, observe the MAP sensor scan tool parameter.

3. Use the observed MAP Sensor Scan Tool parameter that is closest to a value that is indicated in the first column.

4. Using the J-23738-A or the J-35555 to apply 5 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 17

kPa. The acceptable range is indicated in the second column.

5. Using the J-23738-A or the J-35555 to apply 10 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 34

kPa. The acceptable range is indicated in the third column.

Erratic Signal Test

1. Ignition OFF, remove the MAP sensor.

2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal C and the corresponding terminal of the MAP sensor.

3. Install a jumper wire between the low reference terminal A of the MAP sensor and ground.

4. Install a jumper wire at terminal B of the MAP sensor.

5. Connect a DMM between the jumper wire from the terminal B of the MAP sensor and ground.

6. Ignition ON, with the J-23738-A or J-35555, slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage

should vary between 4.9-0.2 V without any spikes or dropouts.

瀚慖f the voltage is erratic, replace the MAP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold

Pressure/Vacuum Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming.

P0107

DTC P0107 or P0108

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0107

- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

DTC P0108

- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1962

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1962

瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal,

replace the K20 ECM.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the K20 ECM.

4. Connect a test lamp between the each of the ground circuits terminal A, and terminal B, and B+. The test lamp should illuminate on each

circuit.

瀚慖f the test lamp does not illuminate, test the suspected circuit for an open/high resistance.

5. If all circuits/connections test normal, replace the T8 ignition coil.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P2310

DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (w/LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0351

- Ignition Coil 1 Control Circuit

DTC P0352

- Ignition Coil 2 Control Circuit

DTC P0353

- Ignition Coil 3 Control Circuit

DTC P0354

- Ignition Coil 4 Control Circuit

DTC P0355

- Ignition Coil 5 Control Circuit

DTC P0356

- Ignition Coil 6 Control Circuit

DTC P2300

- Ignition Coil 1 Control Circuit Low Voltage

DTC P2301

- Ignition Coil 1 Control Circuit High Voltage

DTC P2303

- Ignition Coil 2 Control Circuit Low Voltage

DTC P2304

- Ignition Coil 2 Control Circuit High Voltage

DTC P2306

- Ignition Coil 3 Control Circuit Low Voltage

2010 Cadillac Truck SRX AWD V6-3.0L Page 636

2010 Cadillac Truck SRX AWD V6-3.0L Page 636

瀚慖f less than the specified range, test either control circuit for a short to ground. If the circuits test normal, replace the X53 fuse block-rear.

瀚慖f greater than the specified range, test either control circuit for a short to voltage or an open/high resistance. If the circuits test normal,

replace the X53 fuse block-rear.

11. If all circuits test normal, replace the K9 BCM.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate A23 door latch assembly.

2. Install a 25 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control

terminal and ground. Reverse the jumper wires at least two times, the A23 door latch assembly should perform the LOCK and UNLOCK

functions.

瀚慖f it does not perform as specified, replace the A23 door latch assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Front Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Front Side Door Lock Replacement)

* Rear Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Rear Side Door Lock Replacement)

* Fuse Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Removal and Replacement/Fuse

Block Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming

B3130

DTC B3125, B3130, or B3135

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B3125 01

- Driver Door Only Unlock Circuit Short to Battery

DTC B3125 02

- Driver Door Only Unlock Circuit Short to Ground

DTC B3130 01

- All Doors Unlock Circuit Short to Battery

DTC B3130 02

- All Doors Unlock Circuit Short to Ground

DTC B3135 01

- All Doors Lock Circuit Short to Battery

DTC B3135 02

- All Doors Lock Circuit Short to Ground

Diagnostic Fault Information

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1944

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1944

瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal,

replace the K20 ECM.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the K20 ECM.

4. Connect a test lamp between the each of the ground circuits terminal A, and terminal B, and B+. The test lamp should illuminate on each

circuit.

瀚慖f the test lamp does not illuminate, test the suspected circuit for an open/high resistance.

5. If all circuits/connections test normal, replace the T8 ignition coil.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P2301

DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (w/LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0351

- Ignition Coil 1 Control Circuit

DTC P0352

- Ignition Coil 2 Control Circuit

DTC P0353

- Ignition Coil 3 Control Circuit

DTC P0354

- Ignition Coil 4 Control Circuit

DTC P0355

- Ignition Coil 5 Control Circuit

DTC P0356

- Ignition Coil 6 Control Circuit

DTC P2300

- Ignition Coil 1 Control Circuit Low Voltage

DTC P2301

- Ignition Coil 1 Control Circuit High Voltage

DTC P2303

- Ignition Coil 2 Control Circuit Low Voltage

DTC P2304

- Ignition Coil 2 Control Circuit High Voltage

DTC P2306

- Ignition Coil 3 Control Circuit Low Voltage