2010 Cadillac Truck SRX AWD V6-3.0L Page 1522

2010 Cadillac Truck SRX AWD V6-3.0L Page 1522

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

Circuit/System Verification

1. Ignition ON, observe the scan tool ECM - Fuel Level Sensor parameters. The reading should be between 0.5-3.5 V and vary with fuel level.

2. Ignition ON, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the fuel level gauge sweeps from its low to high

position

瀚慖f the fuel level gauge does not sweep, replace the P16 Instrument Cluster.

3. Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF.

瀚慖f the low fuel level indicator always stays on or always off, replace the P16 Instrument Cluster.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate fuel level sensor.

2. Test for less than 30 ohm at the low reference circuit terminal C.

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 K20

Engine Control Module.

3. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal D and ground.

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

Module.

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

the K20 Engine Control Module.

4. If all circuits test normal, replace the appropriate fuel level sensor.

Repair Instructions

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

* Primary Fuel Level Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Level Sensor/Service and

Repair)

* Secondary Fuel Tank Module Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank Unit/Service and

Repair/Secondary Fuel Tank Module Replacement)

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

P0480

DTC P0480 (w/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 P0480

- Cooling Fan Relay 1 Control Circuit

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 761

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

Circuit/System Verification

Verify that DTC C028A is not set.

If DTC is set, program the parking brake control module. If the DTC resets, replace the K83 Parking Brake Control Module.

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 parking brake control module replacement, setup, and

programming.

C028B

DTC C028B

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 C028B 08

- Park Brake Motor Position Sensor Signal Performance-Signal Invalid

DTC C028B 26

- Park Brake Motor Position Sensor Signal Low Frequency

DTC C028B 29

- Park Brake Motor Position Sensor Signal Too Few Pulses

DTC C028B 2A

- Park Brake Motor Position Sensor Signal Too Many Pulses

Circuit/System Description

The parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The parking brake control module

also contains the logic for applying and releasing the parking brake when commanded by the park brake switch. When the parking brake control

module receives a signal from the switch the internal circuit board temperature is checked to verify it is within operating range before the control

module performs the requested operation. The parking brake control module also contains an internal park brake motor position sensor which

monitors the park brake motor position.

The Park Brake Motor Position Sensor is an internal sensor to the park brake control module, this sensor is used to monitor the park brake motor

position.

Conditions for Running the DTC

Ignition OFF, ACCESSORY, or RUN mode.

Conditions for Setting the DTC

The parking brake control module detects an internal motor position sensor signal malfunction.

Action Taken When the DTC Sets

* The electric parking brake is disabled, one release allowed.

* A message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1070

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

Special Tools

J 35616-200 - Test Lamp Kit

Diagnostic Aids

* The engine oil condition has a major impact on the camshaft actuator system.

* A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was

performed. You may also monitor the scan tool Engine Oil Life parameter. Advise the customer an oil change may be required.

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause

this DTC to set.

Circuit/System Verification

Note: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position actuator system. Verify that the

engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.

1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0016, P0017, P0018, P0019,

P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523,

P0638, P2100, P2101, P2102, P2103, or P2119.

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.

2. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

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 Q6 Camshaft Position Actuator Solenoid Valve.

2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.

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

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

Note: Use the J 35616-200 - Test Lamp Kit for this test. If the J 35616-200 - Test Lamp Kit is not available, use a test lamp that measures

greater than 20 ohm.

3. Connect a test lamp between the control circuit terminal 2 and B+.

Note: The voltage must be measured at the control side of the circuit.

4. Command the appropriate Camshaft Position Actuator Solenoid Valve ON with a scan tool. Load test for less than 1 V between the control

circuit terminal 2 and ground.

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

K20 Engine Control Module.

5. Remove the Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the

following conditions:

* For a torn, restricted, mis-positioned, or missing screens at the Camshaft Position Actuator Solenoid Valve

* For engine oil leaks between the oil sealing lands of the Camshaft Position Actuator Solenoid Valve. Inspect the lands of the Camshaft

Position Actuator Solenoid Valve for nicks

* For oil seepage at the Camshaft Position Actuator Solenoid Valve connector

瀚慖f a condition is found, replace Q6 Camshaft Position Actuator Solenoid Valve.

6. Ignition OFF, swap the appropriate Camshaft Position Actuator Solenoid Valve with a Camshaft Position Actuator Solenoid Valve that is

operating correctly.

7. Engine idling. Command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

瀚慖f greater than the specified value, replace the mechanical camshaft position actuator.

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

Circuit/System Verification

Ignition ON, driving in a straight line at a speed greater than 20 km/h (13 mph), observes the scan tool Wheel Speed Sensor parameters. The

readings should be within 1 mph of each other.

Circuit/System Testing

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

2. Ignition ON, test for greater than 11 V between the signal circuit terminal B and ground.

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

the K17 EBCM.

3. Install a 3 A fused jumper wire at the signal circuit terminal B. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly

tapping the fused jumper wire to the low reference circuit terminal A.

瀚慖f no change is observed, disconnect the harness connector at the K17 EBCM and test for the following conditions below. If all circuits

test normal, replace the K17 EBCM.

* Signal circuit for short to voltage.

* Low reference circuit for a short to voltage, short to ground, or an open/high resistance.

4. If all circuits test normal, test or replace the B5 wheel speed sensor.

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

Park Brake

DTC C056D

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 C056D 34

- ECU Hardware Performance RAM Failure

DTC C056D 35

- ECU Hardware Performance ROM Failure

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2010 Cadillac Truck SRX AWD 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

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

Circuit/System Test

C0293 01 or C0293 06

1. Ignition OFF, disconnect the harness at the S91 Electric Parking Brake Switch.

2. Test for B+ between the B+ circuit terminal listed below and ground:

* Terminal 4

* Terminal 5

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

K83 Electric Parking Brake Control Module.

瀚慖f greater than the specified range, test the B+ circuit for a short to voltage. If the circuit tests normal, replace the K83 Electric Parking

Brake Control Module.

3. Disconnect the harness at the K83 Electric Parking Brake Control Module.

4. Ignition ON, test for less than 1 V between the following signal circuit terminals at the electric parking brake switch harness connector and

ground:

* Terminal 1

* Terminal 2

* Terminal 3

* Terminal 7

瀚慖f greater than the specified range, test the signal circuit for a short to voltage.

5. Test for infinite resistance between the signal circuits listed below and ground:

* Terminal 1

* Terminal 2

* Terminal 3

* Terminal 7

瀚慖f less than the specified value, test the park brake signal circuit for a short to ground.

6. Test for less than 5 Ohms between the following signal circuit terminals:

* Electric parking brake switch harness terminal 1 and the electric parking brake control module terminal N

* Electric parking brake switch harness terminal 2 and the electric parking brake control module terminal C

* Electric parking brake switch harness terminal 3 and the electric parking brake control module terminal B

* Electric parking brake switch harness terminal 7 and the electric parking brake control module terminal D

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

7. If all circuits test normal, test or replace the S91 Electric Parking Brake Switch. If DTC resets, replace the K83 Electric Parking Brake

Control Module.

C0293 08

Remove the EPB fuse and reinstall. Verify DTC C0293 08 is not set.

If DTC C0293 08 is set replace the electric parking brake switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the electric parking brake switch.

2. Test for infinite resistance between the terminals listed below with the switch in the inactive state:

* B+ terminal 4 and the park brake switch signal terminal 1

* B+ terminal 4 and the park brake switch signal terminal 2

* B+ terminal 5 and the park brake switch signal terminal 1

* B+ terminal 5 and the park brake switch signal terminal 2

* Park brake switch signal terminal 3 and the park brake switch signal terminal 1

* Park brake switch signal terminal 3 and the park brake switch signal terminal 2

* Park brake switch signal terminal 7 and the park brake switch signal terminal 1

* Park brake switch signal terminal 7 and the park brake switch signal terminal 2

瀚慖f less than the specified range, replace the electric parking brake switch.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1111

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

Special Tools

J 38522 Variable Signal Generator

Circuit/System Verification

1. Engine idling for 1 minute, observe the DTC information with a scan tool. DTCs P0100, P0102 and P0103 should not set.

2. 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 B75 MAF sensor.

2. Ignition OFF, remove the fuse that supplies B+ to terminal 56 X2 of the ECM.

3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm

between the ground circuit terminal 2 and the ground.

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

4. Install fuse that supplies B+ to terminal 56 X2 of the ECM.

Caution: Do NOT use the low reference circuit in the component harness connector for this test. Damage to the control module may occur

due to excessive current draw.

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

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

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

6. Test for 4.8-5.2 V between the signal circuit terminal 5 and the ground circuit terminal 2.

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 5 at the B75 MAF sensor harness connector. Connect the

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

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 Hz parameter. The parameter should be between 4,950-5,050 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 B75 MAF 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 (LF1) (See: Powertrain Management/Computers and Control

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

Replacement (LAU) (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

P0101

DTC P0101 (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

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

Circuit/System Verification

Clear all DTCs and operate the steering column lock control module within the conditions for running the DTC. The DTC should not set.

If the DTC sets, reprogram the K60 Steering Column Lock Control Module. If the DTC resets, replace the K60 Steering Column Lock Control

Module.

Repair Instructions

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

* Steering Column Lock Control Module Replacement (ULS) (See: Steering and Suspension/Steering/Steering Column/Steering Column

Lock/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for steering column lock control module

replacement, setup and programming

B2955

DTC B2955

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 B2955 00

- Security Sensor Data Circuit

Diagnostic Fault Information

Circuit/System Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized

by the exciter coils surrounding the ignition lock cylinder. The transponder transmits a signal to the body control module (BCM). The BCM then

compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the

engine control module (ECM). If the learned key code does not match or a transponder value is not received, the BCM will send the start disable

password to the ECM.

Conditions for Running the DTC

Ignition is in the Accessory or Run position.

Conditions for Setting the DTC

The BCM detects a circuit fault between itself and the immobilizer control module.

Action Taken When the DTC Sets

* Vehicle starting will be disabled.

* The security indicator in the instrument cluster will be illuminated. A service message will be displayed in the driver information center.

Conditions for Clearing the DTC

* A current DTC will be cleared when the condition for setting the DTC are no longer present.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 660

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B51 headlamp leveling sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 3 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 K28

headlamp leveling control module.

3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 1 and ground.

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

replace the K28 headlamp leveling control module.

瀚慖f greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K28 headlamp

leveling control module.

4. Verify the appropriate scan tool Leveling Position Sensor parameter is 0 V.

瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K28

headlamp leveling control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5V reference circuit terminal 1. Verify the appropriate scan tool

Leveling Position Sensor parameter is greater than 5 V.

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

K28 headlamp leveling control module.

6. If all circuits test normal, replace the B51 headlamp leveling sensor.

Repair Instructions

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

* Headlamp Leveling Front Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Front Suspension Height Sensor Replacement)

* Headlamp Leveling Rear Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Rear Suspension Height Sensor Replacement)

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

setup, and programming

B3420

DTC B3410 or B3420

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 B3410 01

- Automatic Headlamp Leveling Control Module Front Axle Sensor Signal Circuit Short to Battery

DTC B3410 06

- Automatic Headlamp Leveling Control Module Front Axle Sensor Signal Circuit Low Voltage/Open

DTC B3420 01

- Automatic Headlamp Leveling Control Module Rear Axle Sensor Signal Circuit Short to Battery

DTC B3420 06

- Automatic Headlamp Leveling Control Module Rear Axle Sensor Signal Circuit Low Voltage/Open

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 672

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

Circuit/System Verification

Observe the function of the right and left turn signal lamps while turning the hazard lamp switch ON and OFF. The right and left turn signal lamps

should cycle ON and OFF while the hazard lamp switch is ON and remain OFF when the hazard lamp switch is OFF.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the P17 info display module.

2. Ignition ON, test for greater than 10V between the signal circuit terminal 16 and ground.

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

the K9 BCM.

3. If all circuits test normal, replace the P17 info display module.

Repair Instructions

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

* Radio Control Assembly Replacement (See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Radio/Stereo/Service

and Repair/Radio Control Assembly Replacement)

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

B3604

DTC B3604 or B3605

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 B3604 02

- Adjustable Pedal Forward Switch Circuit Short to Ground

DTC B3605 02

- Adjustable Pedal Rearward Switch Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

Ground is supplied at all times to the adjustable pedal switch. When the pedals switch is pressed, a 5 V reference voltage is applied through the

switch contacts and the switch signal circuit to the memory seat control module. The memory seat control module then commands the adjustable

pedals motor to move in response to the switch signal.

Conditions for Running the DTC

The memory seat control module must be powered.

Conditions for Setting the DTC

The forward and rearward switch signal circuits are active at the same time.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1117

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

Special Tools

J 38522 Variable Signal Generator

Circuit/System Verification

1. Verify that DTCs P0685, P0690 or B1380 are not set.

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Engine running, observe the scan tool MAF Sensor Signal parameter. The reading should be between 1,700-3,800 Hz depending on the

engine coolant temperature (ECT).

3. A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This

increase should be from 2-6 g/s at idle to greater than 180 g/s at the time of the 1-2 shift.

4. 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. Verify that DTCs P0685, P0690 or B1380 are not set.

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Verify the integrity of the air induction system by inspecting for the following conditions:

* Loose or improper installation

* Water intrusion

3. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.

4. Remove the fuse that supplies B+ to terminal 52 X1 of the ECM.

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

between the ground circuit terminal B and ground.

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

6. Install the fuse that supplies B+ to terminal 52 X1 of the ECM.

7. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal C and ground.

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

瀚慖f the circuit tests normal and the fuse is open, test all the components connected to the circuit, and repair or replace as necessary.

8. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal A and ground.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests 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 tests normal, replace the K20 ECM.

9. 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 the black lead to ground.

10. Set the J 38522 signal to 5 V, the Frequency to 5K, and the Duty Cycle to Normal.

11. Engine idling, observe the scan tool MAF Sensor parameter. The scan tool MAF Sensor parameter should be between 4,950-5,050 Hz.

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

12. If all other circuits 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 (LF1) (See: Powertrain Management/Computers and Control

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

Replacement (LAU) (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 ECM replacement, setup, and programming

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B51 headlamp leveling sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 3 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 K28

headlamp leveling control module.

3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 1 and ground.

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

replace the K28 headlamp leveling control module.

瀚慖f greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K28 headlamp

leveling control module.

4. Verify the appropriate scan tool Leveling Position Sensor parameter is 0 V.

瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K28

headlamp leveling control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5V reference circuit terminal 1. Verify the appropriate scan tool

Leveling Position Sensor parameter is greater than 5 V.

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

K28 headlamp leveling control module.

6. If all circuits test normal, replace the B51 headlamp leveling sensor.

Repair Instructions

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

* Headlamp Leveling Front Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Front Suspension Height Sensor Replacement)

* Headlamp Leveling Rear Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Rear Suspension Height Sensor Replacement)

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

setup, and programming

B3415

DTC B3415

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 B3415 01

- Automatic Headlamp Leveling Control Module Axle Sensor Supply Circuit Short to Battery

DTC B3415 02

- Automatic Headlamp Leveling Control Module Axle Sensor Supply Circuit Short to Ground

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 274

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

Circuit/System Verification

1. Ignition OFF, with the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior driver door

handle. The driver door should unlock and unlatch allowing the driver door to be pulled open.

瀚慖f the driver door will not unlock and open with a single pull of the exterior door handle, refer to Driver Door Latch Malfunction.

2. With the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior passenger door handle or the

exterior left rear door handle or the exterior right rear door handle. The appropriate door should unlock and unlatch allowing the door to be

pulled open.

瀚慖f all the passenger, left rear and right rear doors will not unlock and open with a single pull of the exterior door handle, refer to

Passenger and Rear Door Release Command Inoperative.

瀚慖f a door will not unlock and open with a single pull of the door handle, refer to Passenger or Rear Door Latch Malfunction.

Circuit/System Testing

Driver Door Latch Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the K84 keyless entry control module.

2. Test for less than 10 ohm between the ground circuit terminal 6 and ground.

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

3. Ignition OFF, connect the X2 harness connector and disconnect the X4 harness connector at the K84 keyless entry control module.

4. Test for infinite resistance between the control circuit terminal 3 and ground.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

5. Ignition OFF, connect the X4 harness connector at the K84 keyless entry control module.

6. Disconnect the harness connector at the A23D door latch assembly - driver.

7. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.

8. Pull and release the exterior driver door handle, the test lamp should briefly illuminate while the exterior door handle is being pulled.

瀚慖f the test lamp is always OFF, test either control circuit for a short to ground or an open/high resistance. If the circuits test normal,

replace the K84 keyless entry control module.

瀚慖f the test lamp is always ON, test either control circuit for a short to voltage. If the circuits test normal, replace the K84 keyless entry

control module.

9. If all circuits test normal, test or replace the A23D door latch assembly - driver.

Passenger and Rear Door Release Command Inoperative

1. Ignition OFF, disconnect the X4 harness connector at the K84 keyless entry control module.

2. Test for infinite resistance between the control circuit terminal 14 and ground.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

3. If all circuits test normal, replace the K84 keyless entry control module.

Passenger or Rear Door Latch Malfunction

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

2. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.

3. Pull and release the appropriate exterior door handle, the test lamp should briefly illuminate while the exterior door handle is being pulled.

瀚慖f the test lamp is always OFF, test either control circuit for a short to ground or an open/high resistance. If the circuits test normal,

replace the K84 keyless entry control module.

瀚慖f the test lamp is always ON, test either control circuit for a short to voltage. If the circuits test normal, replace the K84 keyless entry

control module.

4. If all circuits test normal, test or 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)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM or keyless entry control module

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2010 Cadillac Truck SRX AWD V6-3.0L Page 358

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

Circuit/System Verification

1. Verify DTC B389A did not set immediately following the replacement and programming of a BCM.

瀚慖f the DTC set immediately after the replacement and programming of a BCM, the immobilizer learn procedure was not properly

completed. Perform the BCM immobilizer learn using the Body Control Module IMMO Function with Existing Transponder or Remote

Key in SPS. Refer to Immobilizer System Component Programming (See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Testing and Inspection/Programming and Relearning).

2. Verify DTC B3902 is not set in the any of the following control modules:

* ECM

* SDM

* EBCM

* HVAC control module

* Instrument cluster

* Steering column lock control module, if equipped

瀚慖f DTC B3902 is set in any of the modules, refer to DTC B3902 (See: B Code Charts/B3902).

3. Perform the BCM immobilizer learn using Body Control Module IMMO Function with Existing Transponder or Remote Key in SPS. Refer

to Immobilizer System Component Programming (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and

Inspection/Programming and Relearning). Verify DTC B389A does not set after programming.

If DTC B389A is set after programming, replace the K9 BCM.

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 K9 BCM replacement, programming, and setup

B396A

Liftgate Motor Power Open/Close Malfunction - DTC B396A

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 B396A 01

- Liftgate Motor Control Circuit Short to Battery

DTC B396A 02

- Liftgate Motor Control Circuit Short to Ground

DTC B396A 04

- Liftgate Motor Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B51 headlamp leveling sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 3 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 K28

headlamp leveling control module.

3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 1 and ground.

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

replace the K28 headlamp leveling control module.

瀚慖f greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K28 headlamp

leveling control module.

4. Verify the appropriate scan tool Leveling Position Sensor parameter is 0 V.

瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K28

headlamp leveling control module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5V reference circuit terminal 1. Verify the appropriate scan tool

Leveling Position Sensor parameter is greater than 5 V.

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

K28 headlamp leveling control module.

6. If all circuits test normal, replace the B51 headlamp leveling sensor.

Repair Instructions

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

* Headlamp Leveling Front Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Front Suspension Height Sensor Replacement)

* Headlamp Leveling Rear Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and

Replacement/Headlamp Leveling Rear Suspension Height Sensor Replacement)

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

setup, and programming

B3531

DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531

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 B0223 01

- Recirculate Position Command 1 Circuit Short to Battery

DTC B0223 06

- Recirculate Position Command 1 Circuit Low Voltage/Open

DTC B022A 01

- Recirculate Position Command 2 Circuit Short to Battery

DTC B022A 06

- Recirculate Position Command 2 Circuit Low Voltage/Open

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2010 Cadillac Truck SRX AWD V6-3.0L Page 876

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

Circuit/System Verification

Ignition ON, observe the scan tool Suspension Position Sensor 5 V Reference parameter. The parameter should be 4.8-5.2 V.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at all 5 vertical body and suspension acceleration sensors.

2. Ignition ON, test for 4.8-5.2 V between any one of the 5 V reference circuits terminal and ground.

瀚慖f less than the specified range, test all of the 5 V reference circuits for a short to ground. If the circuits test normal, replace the K19

suspension control module.

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

suspension control module.

3. Test for 4.8-5.2 V between all 5 vertical body and suspension acceleration sensor signal circuits terminals and ground.

瀚慖f less than the specified range, test the signal 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 signal circuit for a short to voltage. If the circuit tests normal, replace the K19 suspension

control module.

4. Reconnect each acceleration sensor, one at a time, cycling the ignition OFF and then ON between each connection while observing the scan

tool Suspension Position Sensor 5 V Reference parameter. Verify the parameter is between 4.8-5.2 V.

瀚慖f not within the specified range when a particular acceleration sensor is connected, replace that 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 Front Vertical Accelerometer Replacement - Lower (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 - Lower)

* 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

C0890

DTC C0277 or C0890

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 C0277 06

- Brake Pedal Position Sensor Circuit Short to Ground or Open

DTC C0277 07

- Brake Pedal Position Sensor Circuit High Voltage

DTC C0277 09

- Brake Pedal Position Sensor Circuit Too Fast Transitions

DTC C0277 4B

- Brake Pedal Position Sensor Circuit Calibration Not Learned

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

Circuit/System Verification

Verify DTC C056E is not set.

If the DTC is set, perform the Electronic Parking Brake Control Module Programming and Setup (See: Brakes and Traction Control/Parking

Brake System/Parking Brake Control Module/Testing and Inspection). If the DTC resets, replace the K83 Parking Brake Control Module.

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 parking brake control module replacement, setup, and

programming

Data Communications

DTC C056E

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 C056E XX

- Electronic Control Unit Software

Circuit/System Description

Some control modules must be configured with specific software, serial numbers, vehicle options, or other information. If a control module was not

properly configured after installation that module may set DTC C056E. The symptom byte listed in the DTC Descriptor is for engineering reference

only. No external circuit diagnosis is involved.

Conditions for Running the DTC

Battery voltage is between 9-16 V and data link communications operate normally.

Conditions for Setting the DTC

The control module is not configured properly.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Reference Information

Schematic Reference

Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Data Link Communications Description and Operation (See: Powertrain Management/Computers and Control Systems/Information

Bus/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)

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1093

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

Circuit/System Testing

1. Verify that DTC P0231, P0232 or P023F are not set.

瀚慖f any of those codes are set, refer to DTC P0231, P0232, or P023F (See: P Code Charts/P0231).

2. Ensure that the entire undercarriage of the vehicle is clean, especially around the area where the K27 fuel pump control module is located.

Clear all codes from the K27 fuel pump control module and test drive the vehicle. Verify that DTC P1255 or P064A do not set.

瀚慖f DTC P1255 or P064A reset, replace the K27 fuel pump control module.

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 fuel pump control module replacement, setup, and

programming

P0068

DTC P0068 or P1101

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 P0068

- Throttle Body Airflow Performance

DTC P1101

- Intake Air Flow System Performance

Circuit/System Description

The engine control module (ECM) compares actual airflow based on throttle position (TP) to a calculated airflow based on manifold absolute

pressure (MAP) sensor, and mass air flow (MAF).

Conditions for Running the DTC

DTC P0068

* The engine speed is greater than 800 RPM.

* The ignition voltage is greater than 6.0 V.

* The throttle actuator control system is not in reduced power mode.

* The DTC runs continuously when the above conditions are met.

DTC P1101

* DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0335, P0336 are not set

* The engine speed is between 400-7,000 RPM

* The engine coolant temperature (ECT) is between 69-127掳C (156-260掳F).

* The intake air temperature (IAT) is between -20 to +125掳C (-4 to +257掳F).

* The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

The ECM detects that the actual airflow rate is greater than the calculated airflow.

Action Taken When the DTC Sets

* DTC P0068 is a type A DTC.

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

Circuit/System Verification

1. Engine running, observe the scan tool IAT Sensor parameter. The reading should be between -40 to +149掳C (-40 to +300掳F) depending on

the current ambient temperature and the vehicle operating conditions.

2. 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 B75B MAF/IAT sensor.

2. Remove the fuse that supplies B+ to terminal 52 X1 of the ECM.

3. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm

between the low reference circuit terminal D and ground.

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 tests

normal, replace the K20 ECM.

4. Install fuse that supplies B+ to terminal 52 X1 of the ECM.

5. Ignition ON, verify the scan tool IAT Sensor parameter is colder than -39掳C (-38掳F).

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

ECM.

Note: If the fuse in the jumper wire opens, the signal circuit is shorted to voltage and the sensor may be damaged.

6. Install a 3 A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool IAT parameter is greater than 149掳C

(300掳F).

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

the K20 ECM.

7. If all circuits test normal, test or replace the B75B MAF/IAT sensor.

Component Testing

Measure and record the resistance of the B66 IAT sensor at various ambient temperatures, then compare those measurements to the Temperature

Versus Resistance - Intake Air Temperature Sensor (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature

Versus Resistance - Intake Air Temperature Sensor) table.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the 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)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LAU) (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 ECM replacement, setup, and programming

P0114

DTC P0112, P0113, or P0114 (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 P0112

- Intake Air Temperature (IAT) Sensor Circuit Low Voltage

2010 Cadillac Truck SRX AWD V6-3.0L Page 1418

2010 Cadillac Truck SRX AWD V6-3.0L Page 1418

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

Circuit/System Verification

1. Engine at operating temperature, all accessories OFF, and engine speed greater than 2,000 RPM, observe the Knock Retard and Total Knock

Retard parameters. The parameters should be 0掳.

2. Engine idling, move the related harnesses and connectors for the KS circuits while observing the scan tool Knock Retard and Total Knock

Retard parameters. The parameters should remain steady with no abrupt changes.

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

Note:

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

Check - Vehicle) prior to using these diagnostic procedures.

* If an engine mechanical noise can be heard, repair the condition before proceeding with this diagnostic. Refer to Symptoms - Engine

Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms -

Engine Mechanical).

P0324, P0326 and P0331

1. Using a scan tool, verify DTCs P0335 or P0336 are not set.

瀚慖f any of the DTCs are set, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Verify the following conditions do not exist.

* A loose or broken vehicle accessory

* A loose or broken accessory bracket

* Excessive engine mechanical noise

瀚慖f any of the conditions exist, repair as necessary.

3. Replace the K20 ECM if no external knock sensor circuit issues exist.

P0325, P0327, P0328, P0330, P0332, and P0333

1. Ignition OFF, disconnect the affected B68 KS.

2. Verify the affected B68 KS is properly tightened, refer to Fastener Tightening Specifications (See: Powertrain Management/Specifications).

3. Ignition OFF, with appropriate length jumper wires, connect the B68A KS1 harness to the B68B KS2 sensor and the B68B KS2 harness to

the B68A KS1 sensor.

4. Monitor the DTCs using a scan tool. Operate the vehicle within the conditions for running the DTC. Verify the fault does not follow the

sensor in question.

瀚慖f the fault follows the sensor in question, replace the appropriate B68 KS.

5. Ignition OFF, remove the jumper wires from the previous step.

6. Ignition ON, measure for 1-4 V between each of the following circuits and ground on the K20 ECM side of the harness connector:

* The B68 KS signal circuit, terminal A or 1

* The B68 KS signal circuit, terminal B or 2

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.

7. Test for intermittent or poor connections at the ECM, B68 KS, and in-line connectors where present.

8. If all circuits test normal, replace the K20 ECM.

P06B6 or P06B7

1. Using a scan tool, verify the following DTCs are not set: P0325, P0327, P0328, P0330, P0332, and P0333.

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

2. DTCs P06B6 and P06B7 indicate an internal ECM circuitry failure. Verify the external knock sensor circuits and connectors for proper

condition.

瀚慖f no external knock sensor circuit issues exist, replace the K20 ECM.