2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 721

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 721

* 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 LOCK/UNLOCK relay is controlled by the body control module (BCM) by providing voltage to one side of the relay or providing a ground to

the other side of the relay. During lock or unlock operation, battery voltage will be supplied to the lock actuators through the energized side of the

relay and grounded through the de-energized side of the relay.

Conditions for Running the DTC

The system voltage must be between 9-16 volts.

Conditions for Setting the DTC

B3130 00

The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to unlock.

B3135 00

The BCM detects a fault on the REAR DOOR LOCK/UNLOCK relay control circuit while commanding the rear doors to lock.

Action Taken When the DTC Sets

The rear power door locks will malfunction.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will become a history DTC.

* A history DTC will clear after 50 ignition cycles.

Reference Information

Schematic Reference

Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation