2010 Cadillac CTS Sedan AWD V6-3.6L Page 573

2010 Cadillac CTS Sedan AWD V6-3.6L Page 573

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

B3135

DTC B3130 or B3135

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 B3130 00

- All Door Unlock Circuit

DTC B3135 00

- All Door Lock Circuit

Diagnostic Fault Information

Circuit/System Description

The rear passenger door locks are controlled by the body control module (BCM). When a door lock switch is operated to the lock position, the

BCM applies voltage to the rear door lock actuator lock control circuit which energizes the lock relay. The BCM applies ground to the rear door

lock actuator unlock control circuit which energizes the unlock relay coil.

Conditions for Running the DTC

Battery voltage is between 9-16 volts.

Conditions for Setting the DTC

B3130 00

The BCM detects a short to voltage on the rear door unlock control circuit.

B3135 00

The BCM detects a short to ground on the rear door lock control circuit.

Actions Taken When the DTC Sets