2010 Cadillac Truck SRX AWD V6-3.0L Page 249

2010 Cadillac Truck SRX AWD V6-3.0L Page 249

瀚慖f DTC is present, refer to Ambient Light/Sunload Sensor Power Supply Malfunction.

2. Verify that DTC B0163 02 or B0163 05 is not set.

瀚慖f DTC is present, refer to Passenger Compartment Temperature Sensor Circuit Malfunction.

3. Verify that DTC B0183 02 or B0183 05 is not set.

瀚慖f DTC is present, refer to Sunload Sensor Circuit Malfunction.

4. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Passenger Compartment Air Temperature

parameter. The measured temperature should be within 5掳C (9掳F) difference of parameter value.

瀚慖f not within the specified range, replace the B10B Ambient Light/Sunload Sensor.

Circuit/System Testing

Ambient Light/Sunload Sensor Power Supply Malfunction

1. Ignition OFF, disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.

2. Test for less than 10 ohm between the B10B Ambient Light/Sunload Sensor ground circuit terminal 6 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the K33 HVAC

Control Module.

3. Ignition ON, test for battery voltage between the reference voltage circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the reference voltage circuit for an open or short to ground. If the circuit tests normal, replace the

K33 HVAC Control Module.

4. If all circuits test normal, replace the B10B Ambient Light/Sunload Sensor.

Passenger Compartment Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.

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

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

replace the K33 HVAC Control Module.

瀚慖f greater than the specified range, test the signal circuit terminal for a short to battery. If the circuit tests normal, replace the K33 HVAC

Control Module.

3. If all circuits test normal, replace the B10B Ambient Light/Sunload Sensor.

Sunload Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the B10B Ambient Light/Sunload Sensor.

2. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 4 and ground.

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

replace the K33 HVAC Control Module.

瀚慖f greater than the specified range, test the signal circuit terminal for a short to battery. If the circuit tests normal, replace the K33 HVAC

Control Module.

3. If all circuits test normal, replace the B10B Ambient Light/Sunload Sensor.

Repair Instructions

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

* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)

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

programming

B0208

DTC B0208

Diagnostic Instructions

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 405

2010 Cadillac Truck SRX AWD V6-3.0L Page 405

瀚慖f DTC is present, refer to Circuit/System Testing.

3. Verify that DTC B0958 21, B0959 21, B0960 21 or B0961 21 is not present.

瀚慖f DTC is present, check the appropriate sensor for contamination with mud, ice or snow. Remove contamination if present and drive

vehicle above 40 km/h (25 MPH). If after driving vehicle above 40 km/h (25 MPH) the DTC is still present, refer to Diagnostic Aids.

4. Verify that DTC B0958 3A, B0959 3A, B0960 3A or B0961 3A is not present.

瀚慖f DTC is present, replace the appropriate sensor with a sensor of correct sensor type.

5. Ignition ON, transmission in REVERSE, verify the scan tool Parking Assist System Status parameter displays Enabled.

Circuit/System Testing

1. Ignition OFF for 30 s, disconnect the harness connector at the appropriate rear object sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 2 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 K86

parking assist control module.

3. Ignition ON, transmission in REVERSE, 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 K86

parking assist control module.

4. Ignition OFF, remove the malfunctioning object sensor and swap locations with another properly functioning rear 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 K86 parking assist control module.

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

Repair Instructions

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

^ Rear Object Sensor Replacement (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Parking

Assist Distance Sensor/Service and Repair/Rear Object Sensor Replacement)

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

programming and setup

B0959

DTC B0958, B0959, B0960, or B0961

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 B0958 01: Parking Aid Rear Sensor Left Corner Circuit Short to Battery

DTC B0958 06: Parking Aid Rear Sensor Left Corner Circuit Low Voltage/Open

DTC B0958 08: Parking Aid Rear Sensor Left Corner Circuit Performance - Signal Invalid

DTC B0958 21: Parking Aid Rear Sensor Left Corner Circuit Incorrect Period

DTC B0958 3A: Parking Aid Rear Sensor Left Corner Circuit Incorrect Component Installed

2010 Cadillac Truck SRX AWD V6-3.0L Page 153

2010 Cadillac Truck SRX AWD V6-3.0L Page 153

瀚慖f DTC is present, refer to Electrical Auxiliary Heater Signal Circuit Malfunction.

Circuit/System Testing

Electrical Auxiliary Heater Control Circuit Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the K33 HVAC Control Module and the X1 harness connector at the E40 Electrical

Auxiliary Heater.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 2 X1 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.

3. Test for less than 0.3 V between the control circuit terminal 7 X2 at the K33 HVAC Control Module harness connector and ground.

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

4. Ignition OFF, test for infinite resistance between the control circuit terminal 7 X2 at the K33 HVAC Control Module harness connector and

ground.

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

5. Test for less than 5 ohm between the K33 HVAC Control Module control circuit terminal 7 X2 and control circuit terminal 1 X1 at the E40

Electrical Auxiliary Heater harness connector.

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

6. If all circuits test normal, replace the E40 Electrical Auxiliary Heater and verify the DTC does not reset.

Electrical Auxiliary Heater Signal Circuit Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the K33 HVAC Control Module and the harness connectors at the E40 Electrical

Auxiliary Heater.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 1 X2 at the E40 Electrical Auxiliary Heater harness connector

and ground.

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

3. Verify that a test lamp illuminates between the B+ circuit terminal 1 X2 and ground circuit terminal 1 X3.

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

4. Verify that a test lamp illuminates between the ignition circuit terminal 2 X1 and ground circuit terminal 1 X3.

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

5. Test for less than 0.3 V between the signal circuit terminal 5 X2 at the K33 HVAC Control Module harness connector and ground.

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

6. Ignition OFF, test for infinite resistance between the signal circuit terminal 5 X2 at the K33 HVAC Control Module harness connector and

ground.

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

7. Test for less than 5 ohm between the K33 HVAC Control Module signal circuit terminal 5 X2 and signal circuit terminal 4 X1 at the E40

Electrical Auxiliary Heater harness connector.

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

8. If all circuits test normal, replace the E40 Electrical Auxiliary Heater and verify the DTC does not reset.

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 HVAC control module replacement, setup, and