2010 Cadillac Truck SRX AWD V6-3.0L Page 399

2010 Cadillac Truck SRX AWD V6-3.0L Page 399

瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K41

Parking Assist Control Module.

3. Ignition ON, activate the park assist, test for 7.5-9.0 V between the 8 V reference circuit terminal 1 and ground.

瀚慖f less than the specified range, test the 8 V reference circuit for an open/high resistance. If the circuit tests normal, replace the K41

Parking Assist Control Module.

4. Ignition OFF, remove the malfunctioning object sensor and swap locations with another properly functioning front object sensor. Connect the

harness connector at both sensors.

5. Ignition ON, verify the DTC is set for the new location in which the malfunctioning sensor is installed.

瀚慖f the DTC does not set for the new location, test the signal circuit terminal 3 for a short to voltage, short to ground, or an open/high

resistance. If the circuit tests normal, replace the K41 Parking Assist Control Module.

6. If the DTC sets for the new location in which the malfunctioning sensor is installed, replace the appropriate front object sensor.

Repair Instructions

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

* Front Object Alarm Sensor Replacement (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Parking Assist Distance Sensor/Service and Repair/Front Object Alarm Sensor Replacement)

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

setup and programming

B0957

DTC B0954, B0955, B0956, or B0957

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 B0954 01

- Parking Aid Front Sensor Left Corner Circuit Short to Battery

DTC B0954 06

- Parking Aid Front Sensor Left Corner Circuit Low Voltage/Open

DTC B0954 08

- Parking Aid Front Sensor Left Corner Circuit Performance - Signal Invalid

DTC B0954 21

- Parking Aid Front Sensor Left Corner Circuit Incorrect Period

DTC B0954 3A

- Parking Aid Front Sensor Left Corner Circuit Incorrect Component Installed

DTC B0955 01

- Parking Aid Front Sensor Left Middle Circuit Short to Battery

DTC B0955 06

- Parking Aid Front Sensor Left Middle Circuit Low Voltage/Open

DTC B0955 08

- Parking Aid Front Sensor Left Middle Circuit Performance - Signal Invalid

DTC B0955 21

- Parking Aid Front Sensor Left Middle Circuit Incorrect Period

2010 Cadillac Truck SRX AWD V6-3.0L Page 1508

2010 Cadillac Truck SRX AWD V6-3.0L Page 1508

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

ECM.

3. Ignition ON, test for 4.8-5.2V between the 5V reference circuit terminal 3 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 K20 ECM.

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 ECM.

4. Verify the scan tool B150 fuel tank pressure sensor parameter is less than 0.2V.

瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

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

pressure sensor parameter is greater than 4.7V.

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

K20 ECM.

6. If all circuits test normal, test or replace the B150 fuel tank pressure sensor.

Repair Instructions

* Fuel Tank Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Tank Pressure Sensor/Service

and Repair)

* For DTC P0452 or P0453, always perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic

procedure.

* For DTC P0451 or P0454, clear DTCs with a scan tool.

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

P0454

DTC P0451-P0454 (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 P0451

- Fuel Tank Pressure Sensor Performance

DTC P0452

- Fuel Tank Pressure Sensor Circuit Low Voltage

DTC P0453

- Fuel Tank Pressure Sensor Circuit High Voltage

DTC P0454

- Fuel Tank Pressure Sensor Intermittent

Diagnostic Fault Information

Typical Scan Tool Data