2010 Cadillac Truck SRX AWD V6-3.0L Page 381

2010 Cadillac Truck SRX AWD V6-3.0L Page 381

瀚慖f greater than the specified value, 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 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 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 for a short to voltage. If the circuit tests normal, replace the K33 HVAC Control

Module.

4. If all circuits test normal, replace the temperature 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)

B0514

DTC B0173, B0178, B0509, B0514, B0519, B3583, or B3933

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 B0173 02

- Upper Left Duct Air Temperature Sensor Circuit Short to Ground

DTC B0173 05

- Upper Left Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0178 02

- Lower Left Duct Air Temperature Sensor Circuit Short to Ground

DTC B0178 05

- Lower Left Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0509 02

- Upper Right Duct Air Temperature Sensor Circuit Short to Ground

DTC B0509 05

- Upper Right Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0514 02

- Lower Right Duct Air Temperature Sensor Circuit Short to Ground

DTC B0514 05

- Lower Right Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0519 02

- Rear Upper Duct Air Temperature Sensor Circuit Short to Ground

DTC B0519 05

- Rear Upper Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B3583 02

- Rear Lower Duct Air Temperature Sensor Circuit Short to Ground

DTC B3583 05

- Rear Lower Duct Air Temperature Sensor Circuit High Voltage/Open

2010 Cadillac Truck SRX AWD V6-3.0L Page 354

2010 Cadillac Truck SRX AWD V6-3.0L Page 354

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, test or replace the X50A

Fuse Block - Underhood.

3. Connect a test lamp between the control circuit terminal 85 and ground.

4. Ignition ON, command the rear washer relay ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing

between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control

Module.

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

replace the K9 Body Control Module.

5. If all circuits test normal, test or replace the KR7 Rear Wiper Relay.

Component Testing

Relay Test

1. Ignition OFF, connect the KR7 Rear Window Wiper Relay.

2. Test for 60-200 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the relay.

4. Test for less than 5 ohm between terminals 30 and 87A.

瀚慖f greater than the specified range, replace the relay.

5. Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 5 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR7 Rear Window Wiper Relay.

Repair Instructions

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

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Rear Window Wiper Motor Replacement (See: Wiper and Washer Systems/Wiper Motor/Service and Repair/Rear Window Wiper Motor

Replacement)

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

B388A

DTC B388A

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 B388A 01

- Trailer Park Lamps Circuit Short to Battery