2010 Cadillac Truck SRX FWD V6-3.0L Page 768

2010 Cadillac Truck SRX FWD V6-3.0L Page 768

Component Testing

Note: The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed

during the test.

1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.

2. Connect a 3 A fused jumper wire between the signal terminal 1 and 12 V.

3. Connect a DMM set to read DC amperage between the low reference terminal 2 and ground.

4. Spin the wheel very slowly, test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.

瀚慖f not within the specified range, replace the B5 wheel speed sensor.

Repair Instructions

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

* Front Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Front Wheel Speed Sensor Replacement)

* Rear Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Rear Wheel Speed Sensor Replacement)

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

C039F

DTC C039F

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 C039F 00

- AWD Torque Signal

Circuit/System Description

The rear differential clutch control module monitors the amount of torque transferred through the rear axle. If there is a mechanical malfunction that

inhibits the torque transfer process the module will then set DTC C039F.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

A mechanical malfunction exists that inhibits the torque transfer process.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* All-wheel drive (AWD) is disabled.

* Service Rear Axle is displayed on the driver information center.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

* The DTC is not detected in 40 consecutive ignition cycles.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1164

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1164

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P0206

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1073

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1073

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S.

2. Test for 5-25 ohm between terminals C and D of the HO2S.

瀚慖f not within the specified range, replace the 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 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (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)

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

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (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

P135A

DTC P135A or P135B (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 P135A

- Ignition Coil Supply Voltage Circuit Bank 1

DTC P135B

- Ignition Coil Supply Voltage Circuit Bank 2

Diagnostic Fault Information

Circuit/System Description

The ignition system on this engine uses an individual module/coil for each cylinder. The engine control module (ECM) monitors the ignition

voltage from the fuse of each bank of coils to the ECM. The ECM uses this information to determine if the misfire is ignition coil voltage related.

Conditions for Running the DTC

* The ignition is ON.

* The ignition module supply voltage is less than 2.5 V.

* The DTCs run continuously when the above condition is met.

Conditions for Setting the DTC

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1154

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1154

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P0204

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1013

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1013

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.

Erratic Signal Test

1. Ignition OFF, remove the B74 MAP sensor.

2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.

3. Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.

4. Install a jumper wire at terminal 3 of the B74 MAP sensor.

5. Connect a DMM between the jumper wire from terminal 3 of the B74 MAP sensor and ground.

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

on the DMM. The voltage should vary between 0-5 V without any spikes or dropouts.

瀚慖f the voltage reading is erratic, replace the B74 MAP sensor.

Repair Instructions

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

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

P0111

DTC P0111-P0113 (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 P0111

- Intake Air Temperature (IAT) Sensor Circuit Performance

DTC P0112

- Intake Air Temperature (IAT) Sensor Circuit Low Voltage

DTC P0113

- Intake Air Temperature (IAT) Sensor Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1169

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1169

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P216A

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac Truck SRX AWD V6-3.0L Page 235

2010 Cadillac Truck SRX AWD V6-3.0L Page 235

Component Testing

1. Ignition OFF, disconnect the harness connectors at the B71 liftgate object sensor.

2. Test for 8k-12k ohm between the signal terminal A and the low reference terminal B.

瀚慖f not within the specified range, replace the B71 liftgate object sensor.

Repair Instructions

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

* Liftgate Side Upper Sensor Replacement (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Trunk / Liftgate Position

Sensor/Service and Repair/Liftgate Side Upper Sensor Replacement)

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

programming

B154A

DTC B154A or B154B

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 B154A 39

- Driver Mirror Internal Malfunction

DTC B154B 39

- Passenger Mirror Internal Malfunction

Circuit/System Description

The outside rearview mirror switch is a multiplex switch which signals the left mirror control module which outside rearview mirror to move

(driver or passenger) and which direction to move it. The left mirror control module and the passenger window switch are on a serial data circuit

with the memory seat module as the master. The mirror select and directional control switches are inputs to the left mirror control module. When

the memory seat module receives the switch inputs from the left mirror control module, mirror output commands are sent to the appropriate switch

through the serial data circuit. The left mirror control module and passenger window switch control the left and right outside rear view mirrors

through bi-directional motor control circuits. The motor control circuits are floating while in an inactive state and the switches will apply power and

ground to the control circuits as necessary to move the mirror in the commanded direction.

Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The left mirror control module and

passenger window switch supply a 5 V reference, low reference, and horizontal and vertical position signal circuits to these sensors. The signal

circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to

the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives

a memory recall command, the memory seat module will send the go to position commands to the left mirror control module and passenger window

switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B154A 39

The left mirror control module has determined that a hardware or software error has occurred.

B154B 39

The passenger window switch has determined that a hardware or software error has occurred.

2010 Cadillac Truck SRX AWD V6-3.0L Page 768

2010 Cadillac Truck SRX AWD V6-3.0L Page 768

Component Testing

Note: The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed

during the test.

1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.

2. Connect a 3 A fused jumper wire between the signal terminal 1 and 12 V.

3. Connect a DMM set to read DC amperage between the low reference terminal 2 and ground.

4. Spin the wheel very slowly, test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.

瀚慖f not within the specified range, replace the B5 wheel speed sensor.

Repair Instructions

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

* Front Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Front Wheel Speed Sensor Replacement)

* Rear Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Rear Wheel Speed Sensor Replacement)

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

C039F

DTC C039F

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 C039F 00

- AWD Torque Signal

Circuit/System Description

The rear differential clutch control module monitors the amount of torque transferred through the rear axle. If there is a mechanical malfunction that

inhibits the torque transfer process the module will then set DTC C039F.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

A mechanical malfunction exists that inhibits the torque transfer process.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* All-wheel drive (AWD) is disabled.

* Service Rear Axle is displayed on the driver information center.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

* The DTC is not detected in 40 consecutive ignition cycles.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1159

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1159

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P0205

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2236

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2236

Component Testing

Note: Depending on the application, the relay coil resistance will be within one of the following ranges.

1. Test for one of the following resistance specifications between terminals 85 and 86 of the KR75 powertrain relay:

* 70-100 ohm

* 200-250 ohm

瀚慖f not within the specified range, replace the KR75 powertrain relay.

2. Test for the infinite resistance between the following terminals to the KR75 powertrain relay:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR75 powertrain relay.

3. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install 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 KR75 powertrain 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))

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

P0689

DTC P0685, P0689, or P0690

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 P0685

- Engine Controls Ignition Relay Control Circuit

DTC P0689

- Engine Controls Relay Feedback Circuit Low Voltage

DTC P0690

- Engine Controls Relay Feedback Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1625

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1625

Component Testing

Static Test

1. Ignition OFF, remove the Camshaft Position Actuator Magnet.

2. Test for 5.0-9.0 ohm between the solenoid control terminal 2 and the low reference terminal 1 at the Camshaft Position Actuator Magnet.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Magnet.

3. Test for infinite resistance between each terminal of the magnet and the magnet housing.

瀚慖f not the specified value, replace the Camshaft Position Actuator Magnet.

Dynamic Test

1. Remove the Camshaft Position Actuator Magnet.

Note:

* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.

* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for greater than 1-2 s.

2. Install a 20 A fused jumper wire between the control circuit terminal 2 and 12 V. Momentarily install a jumper wire between the low

reference terminal 1 and ground. The pintle should extent.

瀚慖f the function does not perform as specified, replace the Camshaft Position Actuator Magnet.

Repair Instructions

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

* Camshaft Position Actuator Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/45. Camshaft

Position Actuator Cleaning and Inspection)

* Camshaft Position Actuator Magnet Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Magnet Replacement)

* Camshaft Position Actuator Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push Rods/Camshaft/Service

and Repair/Camshaft Position Actuator Replacement)

* Camshaft Position Actuator Solenoid Valve Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Solenoid Valve Replacement)

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

programming, and setup

P013A

DTC P0133, P013A-P013F, P014A, P014B, P0153, P1133, or P1153

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 P0133

- HO2S Slow Response Bank 1 Sensor 1

DTC P013A

- HO2S Slow Response Rich to Lean Bank 1 Sensor 2

DTC P013B

- HO2S Slow Response Lean to Rich Bank 1 Sensor 2

DTC P013C

- HO2S Slow Response Rich to Lean Bank 2 Sensor 2

DTC P013D

- HO2S Slow Response Lean to Rich Bank 2 Sensor 2

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1622

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1622

Component Testing

Static Test

1. Ignition OFF, remove the Camshaft Position Actuator Magnet.

2. Test for 5.0-9.0 ohm between the solenoid control terminal 2 and the low reference terminal 1 at the Camshaft Position Actuator Magnet.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Magnet.

3. Test for infinite resistance between each terminal of the magnet and the magnet housing.

瀚慖f not the specified value, replace the Camshaft Position Actuator Magnet.

Dynamic Test

1. Remove the Camshaft Position Actuator Magnet.

Note:

* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.

* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for greater than 1-2 s.

2. Install a 20 A fused jumper wire between the control circuit terminal 2 and B+. Momentarily install a jumper wire between the low reference

terminal 1 and ground. The pintle should extent.

瀚慖f the function does not perform as specified, replace the Camshaft Position Actuator Magnet.

Repair Instructions

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

* Camshaft Position Actuator Magnet Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Magnet Replacement)

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

programming, and setup

P0011

DTC P0011

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 P0011

- Camshaft Position (CMP) System Performance

Diagnostic Fault Information

Circuit/System Description

The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshaft while the engine is

operating. The ECM controls the Camshaft Position Actuator Magnet duty cycle by controlling the amount of ON time. The magnet controls the

amount of engine oil flow to the CMP actuator by extending a pintle within the solenoid. The pintle acts against a spool valve in the CMP actuator

mechanism which is attached to the front of the camshaft. As the spool valve is moved, oil is directed to the CMP actuator, which rotates the

camshaft. The ECM can only command the camshaft position actuator to retard the valve timing from the camshaft park position, or advance the

valve timing back to the park position. The total range of valve timing command is 26 degree as measured at the camshaft or 52 degree as measured

2010 Cadillac Truck SRX AWD V6-3.0L Page 297

2010 Cadillac Truck SRX AWD V6-3.0L Page 297

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR49 headlamp low beam relay.

2. Test for 60-180 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR49 headlamp low beam relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR49 headlamp low beam relay.

4. Install a 15A fused jumper wire between relay terminal 85 and 12 V. Install 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 KR49 headlamp low beam relay.

Repair Instructions

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

* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)

* 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))

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

and programming

B257D

DTC B257C or B257D

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 B257C 00

- Left Headlamp Assembly Malfunction

DTC B257D 00

- Right Headlamp Assembly Malfunction

Diagnostic Fault Information

Circuit/System Description

The headlamp control module calculates the headlamp angle and sends commands to the left and right adaptive forward lighting system headlamp

actuators. The headlamp actuators drive the headlamps to the position commanded by the headlamp control module. The headlamp control module

monitors the headlamp actuator motor control circuits for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected,

a DTC will be stored in memory and the driver will be notified with a message displayed over the driver information center located on the

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1803

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1803

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Camshaft Position Actuator Solenoid Valve.

2. Test for 7-12 ohm between the control terminal 2 and the ignition terminal 1 of the Camshaft Position Actuator Solenoid Valve.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Solenoid Valve.

3. Test for infinite resistance between each terminal and the Camshaft Position Actuator Solenoid Valve housing.

瀚慖f not the specified value, replace the Camshaft Position Actuator Solenoid Valve.

Repair Instructions

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

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 1 (Right Side) Intake)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust)

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

programming

P2093

DTC P0010, P0013, P0020, P0023, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 (Without 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 P0010

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1

DTC P0013

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 1

DTC P0020

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2

DTC P0023

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Bank 2

DTC P2088

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1

DTC P2089

- Intake Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1

DTC P2090

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1

DTC P2091

- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Bank 1

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1625

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1625

Component Testing

Static Test

1. Ignition OFF, remove the Camshaft Position Actuator Magnet.

2. Test for 5.0-9.0 ohm between the solenoid control terminal 2 and the low reference terminal 1 at the Camshaft Position Actuator Magnet.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Magnet.

3. Test for infinite resistance between each terminal of the magnet and the magnet housing.

瀚慖f not the specified value, replace the Camshaft Position Actuator Magnet.

Dynamic Test

1. Remove the Camshaft Position Actuator Magnet.

Note:

* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.

* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for greater than 1-2 s.

2. Install a 20 A fused jumper wire between the control circuit terminal 2 and 12 V. Momentarily install a jumper wire between the low

reference terminal 1 and ground. The pintle should extent.

瀚慖f the function does not perform as specified, replace the Camshaft Position Actuator Magnet.

Repair Instructions

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

* Camshaft Position Actuator Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/45. Camshaft

Position Actuator Cleaning and Inspection)

* Camshaft Position Actuator Magnet Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Magnet Replacement)

* Camshaft Position Actuator Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push Rods/Camshaft/Service

and Repair/Camshaft Position Actuator Replacement)

* Camshaft Position Actuator Solenoid Valve Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Solenoid Valve Replacement)

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

programming, and setup

P013A

DTC P0133, P013A-P013F, P014A, P014B, P0153, P1133, or P1153

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 P0133

- HO2S Slow Response Bank 1 Sensor 1

DTC P013A

- HO2S Slow Response Rich to Lean Bank 1 Sensor 2

DTC P013B

- HO2S Slow Response Lean to Rich Bank 1 Sensor 2

DTC P013C

- HO2S Slow Response Rich to Lean Bank 2 Sensor 2

DTC P013D

- HO2S Slow Response Lean to Rich Bank 2 Sensor 2

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1622

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1622

Component Testing

Static Test

1. Ignition OFF, remove the Camshaft Position Actuator Magnet.

2. Test for 5.0-9.0 ohm between the solenoid control terminal 2 and the low reference terminal 1 at the Camshaft Position Actuator Magnet.

瀚慖f not within the specified range, replace the Camshaft Position Actuator Magnet.

3. Test for infinite resistance between each terminal of the magnet and the magnet housing.

瀚慖f not the specified value, replace the Camshaft Position Actuator Magnet.

Dynamic Test

1. Remove the Camshaft Position Actuator Magnet.

Note:

* The Camshaft Position Actuator Magnet pintle should be facing downward for this test.

* Do not allow electrical current to flow through the Camshaft Position Actuator Magnet for greater than 1-2 s.

2. Install a 20 A fused jumper wire between the control circuit terminal 2 and B+. Momentarily install a jumper wire between the low reference

terminal 1 and ground. The pintle should extent.

瀚慖f the function does not perform as specified, replace the Camshaft Position Actuator Magnet.

Repair Instructions

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

* Camshaft Position Actuator Magnet Replacement (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push

Rods/Camshaft/Service and Repair/Camshaft Position Actuator Magnet Replacement)

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

programming, and setup

P0011

DTC P0011

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 P0011

- Camshaft Position (CMP) System Performance

Diagnostic Fault Information

Circuit/System Description

The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshaft while the engine is

operating. The ECM controls the Camshaft Position Actuator Magnet duty cycle by controlling the amount of ON time. The magnet controls the

amount of engine oil flow to the CMP actuator by extending a pintle within the solenoid. The pintle acts against a spool valve in the CMP actuator

mechanism which is attached to the front of the camshaft. As the spool valve is moved, oil is directed to the CMP actuator, which rotates the

camshaft. The ECM can only command the camshaft position actuator to retard the valve timing from the camshaft park position, or advance the

valve timing back to the park position. The total range of valve timing command is 26 degree as measured at the camshaft or 52 degree as measured

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1104

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1104

Component Testing

Temperature Sensor Test

Note: A thermometer can be used to test the sensor off vehicle in heated water.

1. Test the generator control module coolant temperature sensor by varying the sensor temperature while monitoring the sensor resistance.

2. Compare the readings with the Temperature Versus Resistance ().

瀚慖f not within the specified range, replace the generator control module coolant temperature sensor.

Repair Instructions

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

* Coolant Temperature Sensor Replacement (Generator Control Module) ()

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

programming

P0A3F

DTC P0A3F

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 P0A3F

- Drive Motor 1 Position Sensor Circuit

Diagnostic Fault Information

Circuit/System Description

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1270

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1270

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P0274

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1255

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1255

Component Testing

1. Remove the intake manifold and disconnect the appropriate fuel injector.

2. Verify the resistance of each fuel injector with one of the following methods:

* If the engine coolant temperature (ECT) sensor is between 10-32掳C (50-90掳F), the resistance of each fuel injector should be 1.25-1.75

ohm.

瀚慖f not within the specified range, replace the fuel injector.

* If the ECT sensor is not between 10-32掳C (50-90掳F), measure and record the resistance of each fuel injector with a DMM. Subtract the

lowest resistance value from the highest resistance value. The difference between the lowest value and the highest value should be equal

to or less than 0.45 ohm.

瀚慖f the difference is more than 0.45 ohm, add all of the fuel injector resistance values to obtain a total resistance value. Divide the total

resistance value by the number of fuel injectors to obtain an average resistance value. Subtract the lowest individual fuel injector

resistance value from the average resistance value. Compute the difference between the highest individual fuel injector resistance

value and the average resistance value. Replace the fuel injector that displays the greatest difference above or below the average.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector

Replacement)

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

P0270

DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P2146, P2149, P2152, P2155,

P216A, or P216D (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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

DTC P0206

- Cylinder 6 Injector Control Circuit

DTC P0261

- Cylinder 1 Injector Control Circuit Low Voltage

DTC P0262

- Cylinder 1 Injector Control Circuit High Voltage

DTC P0264

- Cylinder 2 Injector Control Circuit Low Voltage

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 297

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 297

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR49 headlamp low beam relay.

2. Test for 60-180 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR49 headlamp low beam relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR49 headlamp low beam relay.

4. Install a 15A fused jumper wire between relay terminal 85 and 12 V. Install 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 KR49 headlamp low beam relay.

Repair Instructions

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

* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)

* 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))

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

and programming

B257D

DTC B257C or B257D

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 B257C 00

- Left Headlamp Assembly Malfunction

DTC B257D 00

- Right Headlamp Assembly Malfunction

Diagnostic Fault Information

Circuit/System Description

The headlamp control module calculates the headlamp angle and sends commands to the left and right adaptive forward lighting system headlamp

actuators. The headlamp actuators drive the headlamps to the position commanded by the headlamp control module. The headlamp control module

monitors the headlamp actuator motor control circuits for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected,

a DTC will be stored in memory and the driver will be notified with a message displayed over the driver information center located on the