2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 91

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 91

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

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

B0012

DTC B0012 or B0013

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 B0012 01

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Battery

DTC B0012 02

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground

DTC B0012 04

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Open Circuit

DTC B0012 0D

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Resistance Above Threshold

DTC B0012 0E

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Resistance Below Threshold

DTC B0013 01

- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Battery

DTC B0013 02

- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Ground

DTC B0013 04

- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Open Circuit

DTC B0013 0D

- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Resistance Above Threshold

DTC B0013 0E

- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Resistance Below Threshold

Diagnostic Fault Information

Circuit/System Description

If a malfunction is detected, a DTC will be stored in non-volatile memory. During a frontal crash of sufficient force the inflatable restraint sensing

and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the driver steering wheel air bag. The

SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

There are 2 shorting bars used within each connector which will short together both driver steering wheel air bag stage 1 high circuit and driver

steering wheel air bag stage 1 low circuit and both driver steering wheel air bag stage 2 high circuit and driver steering wheel air bag stage 2 low

circuit when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.