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Saturday, October 23, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 2050

DTC P2433

- Secondary Air Injection System Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the

exhaust stream in order to accelerate the catalyst operation. A secondary air injection pressure sensor is used to monitor the air flow from the

secondary air injection pump. The engine control module (ECM) supplies voltage to the 5 V reference circuit and provides a ground for the low

reference circuit. The sensor provides a signal voltage to the ECM relative to the pressure changes within the secondary air injection system.

Conditions for Running the DTC

P2431

* DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P050C, P2227, P2228, or P2229 is not set.

* The secondary air injection system has been commanded ON and OFF during the ignition cycle.

* Battery voltage is between 10-18 V.

* Engine speed is 680-3,500 RPM.

* Intake air temperature is between -12 to +80掳C (10.4-176掳F).

* Engine coolant temperature is between -10.5 to +69.8掳C (13-158掳F).

* Mass airflow is less than 100 g/s.

* Catalyst heating is active.

* Current altitude is less than 3,000 m (9,843 ft).

* The difference between intake air temp and engine coolant start temp is less than 15掳C (59掳F).

* The DTC runs once per ignition cycle when the above conditions exist.

P2432 or P2433

* The ignition is ON, or the engine is operating.

* The DTCs run continuously when the above condition exists for greater than 1 s.

Conditions for Setting the DTC

P2431

* The ECM detects that the secondary air injection pressure sensor is 5 kPa (0.7 psi) less than the BARO sensor when the secondary air

injection pump is commanded ON.

* The ECM detects that the secondary air injection pressure sensor is 5 kPa (0.7 psi) greater than the BARO sensor when the secondary air

injection pump is commanded OFF.

P2432

The ECM detects that the secondary air injection pressure sensor signal is less than 0.5 V for greater than 1 s.

P2433

The ECM detects that the secondary air injection pressure sensor signal is greater than 4.5 V for greater than 1 s.

Action Taken When the DTC Sets

DTCs P2431, P2432 and P2433 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P2431, P2432 and P2433 are Type B DTCs.

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Electronic Suspension Control Schematics (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Electronic Suspension Control Description and Operation (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, with a scan tool, command the Damper Actuator Increase and Decrease while observing the Damper Actuator Command parameter.

The parameter should vary between 0-1000 mA. Listen/feel the Q37 shock absorber actuator. The component should activate when changing

between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.

2. Perform this setup step in the following order:

1. Connect a test lamp and ammeter in series between both Q37 shock absorber actuator harness connector control circuit terminals.

2. Ignition ON, with a scan tool, attempt to clear all K19 suspension control module DTC's (codes may not clear).

3. With a scan tool, command the Damper Actuator to Increase the amperage to approximately 400 mA and Decrease to 0 mA while comparing

the ammeter displayed values and scan tool Damper Actuator Command parameter displayed values. Verify the following:

* The test lamp is illuminated.

* The ammeter displayed values and scan tool Damper Actuator Command parameter displayed values change and are simultaneously

within 15 mA of each other.

瀚慖f the test lamp is not illuminated and/or the values are not within the specified range, test both control circuits for a short to voltage, short

to ground, or open/high resistance. If all circuits test normal, replace the K19 suspension control module.

4. If all circuits test normal, test or replace the Q37 shock absorber actuator.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.

2. Test for 2-3 ohm between the Q37 shock absorber actuator control terminals.

瀚慖f not within the specified range, replace the Q37 shock absorber actuator.

Repair Instructions

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

* Strut, Strut Component, or Spring Replacement (See: Steering and Suspension/Suspension/Suspension Spring ( Coil / Leaf )/Service and

Repair/Front Suspension Coil Spring)

* Shock Absorber Replacement (See: Steering and Suspension/Suspension/Suspension Strut / Shock Absorber/Service and Repair/Rear

Suspension Shock Absorber)

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

Friday, October 22, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 1695

and Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

5. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Input Shaft

Speed/Output Shaft Speed Input Test).

6. Inspect the front differential transfer drive gear teeth surface for damage or misalignment and for metallic debris on the face of the sensor.

Repair or replace as necessary.

7. If all circuits test normal, replace the output speed sensor.

Repair Instructions

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

Important: Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches - Transmission and

Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair/Output Speed Sensor Replacement)

Important: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection

(See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming

P0729

DTC P0729

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 P0729

- 6th Gear Ratio Incorrect

Diagnostic Fault Information

2010 Cadillac Truck SRX FWD V6-3.0L Page 1577

Fuel Pump Control Module

DTC P0601-P0604, P0606, or P062F (Fuel Pump Control Module)

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 P0601

- Control Module Read Only Memory (ROM)

DTC P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory (RAM)

DTC P0606

- Control Module Internal Performance

DTC P062F

- Control Module Long Term Memory Performance

Circuit/System Description

The internal fault detection is handled inside the fuel pump control module. No external circuits are involved.

Conditions for Running the DTC

The fuel pump control module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and

ground. This program runs even if the voltage is out of the valid operating range.

Conditions for Setting the DTC

The fuel pump control module has detected an internal malfunction.

Action Taken When the DTC Sets

DTC P0601, P0602, P0603, P0604, P0606 and P062F are type A DTCs.

Conditions for Clearing the DTC

DTC P0601, P0602, P0603, P0604, P0606 and P062F are type A DTCs.

Reference Information

Description and Operation

Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System

Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and

Operation/Fuel System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

2010 Cadillac Truck SRX FWD V6-3.0L Page 805

stability control function depending on multi-axis acceleration sensor input.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

C0186 5A

* The lateral acceleration sensor signal offset is out of specified range.

* The lateral acceleration sensor signal is not plausible with the yaw rate sensor signal, steering angle sensor signal and vehicle speed.

C0186 71

The EBCM received an invalid lateral acceleration sensor signal.

C0196 00

The yaw rate sensor signal is not plausible.

C0196 5A

* The yaw rate sensor offset is out of specified range.

* The yaw rate sensor signal is not plausible with the lateral acceleration sensor signal, steering angle sensor signal and vehicle speed.

C019B 5A

The yaw rate sensor signal is out of specified range.

C0287 4B

The longitudinal acceleration sensor signal offset is out of specified range.

C0287 5A

The longitudinal acceleration sensor signal is not plausible with the vehicle speed.

C0287 71

The EBCM received an invalid longitudinal acceleration sensor signal.

Action Taken When the DTC Sets

C0186 5A, C0186 71, C0196 00, C0196 5A, and C019B 5A

* The EBCM disables the stability control for the duration of the ignition cycle.

* The traction control/stability control-active indicator turns ON.

C0287 4B, C0287 5A, and C0287 71

The EBCM disables the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* The EBCM will turn OFF the indicator in the next ignition cycle.

Diagnostic Aids

DTC C0186 and C0287 may set after replacing the Multi-Axis Acceleration Sensor if the sensor is not configured and setup. Perform the

Multi-Axis Acceleration Sensor Module Programming and Setup (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Testing and Inspection/Multi-Axis Acceleration Sensor Module Programming and Setup) and the Vehicle Yaw Sensor

Learn (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Yaw Rate Sensor/Testing and Inspection/Vehicle Yaw

Sensor Learn) procedures to complete the configuration and setup.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

2010 Cadillac Truck SRX FWD V6-3.0L Page 1468

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Engine running, observe the following scan tool control circuit status parameters for the appropriate cylinder T8 ignition coil:

* Ignition Coil 1-6 Control Circuit Low Voltage Test Status

* Ignition Coil 1-6 Control Circuit Open Test Status

* Ignition Coil 1-6 Control Circuit High Voltage Test Status

Each parameter should display Not Run or OK.

2. Engine idling, observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, or P0356 should not set.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate T8 ignition coil.

2. Ignition OFF, and all vehicle systems OFF, it may take up to 2 minutes for all the systems to power down. Test for less than 5 ohm between

the ground circuit terminal A and ground.

瀚慖f greater than the specified range, repair the ground circuit for an open/high resistance.

3. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal B and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal D and ground.

瀚慖f the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests

normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for open or short to ground.

6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.

瀚慖f test status is Malfunction test for open circuit.

7. Engine running, observe the Ignition Coil 1 6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for short to voltage.

8. If all circuits test normal, test or replace the T8 ignition coil.

Repair Instructions

* T8 Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* T8 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

Repair Verification

Note: An ignition control circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the

3-way catalytic converter.

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.

3. Clear the DTCs.

4. Turn the ignition OFF for 60 s.

5. If the repair is related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle

(See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

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.