2010 Cadillac Truck SRX FWD V6-3.0L Page 479

2010 Cadillac Truck SRX FWD V6-3.0L Page 479

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, headlamps ON, vary the interior backlight dimming from low to full bright by using the dimmer switch. The interior backlighting

should start dim and then become full bright.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.

2. Test for less that 10 Ohms 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 ON, verify that a test lamp illuminates between the B+ circuit terminal 1 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. If the circuit tests normal, replace

the K9 BCM.

4. Ignition ON, test for less than 0.3 V between signal circuit terminal 12 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 K9 BCM.

5. Install a 3 A fused jumper wire between the signal circuit terminal 12 and the B+ circuit terminal 1. The interior backlighting should be

dimmed.

瀚慖f the interior backlighting is not dimmed, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests

normal, replace the K9 BCM.

6. If all circuits test normal, test or replace the S30 headlamp switch.

Repair Instructions

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

* Headlamp Switch Replacement (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair)

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

B1534

DTC B1534 or B1535

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 B1534 02

- Left Rear Door Handle Switch Circuit Short to Ground

DTC B1535 02

- Right Rear Door Handle Switch Circuit Short to Ground

Diagnostic Fault Information