2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 375

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 375

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number, and a secondary data key, which

is a portion of the vehicle identification number (VIN). When the ignition is turned ON, the SDM compares this information to the information

stored in the body control module (BCM) over the serial data communication circuit.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

* The 4-digit primary data key stored in the SDM does not match the 4 digits stored in the BCM.

* The VIN stored in the BCM is not in the acceptable range of VINs allowed by the SDM calibration.

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

* The SDM disables all deployments.

Conditions for Clearing the DTC

* The last 4-digit Primary Data Key in the SDM match the last 4 digits stored in the BCM.

* The VIN stored in the BCM is in the acceptable range of VINs allowed by the SDM calibration.

Diagnostic Aids

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the BCM was replaced without reprogramming

the BCM with the new information.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

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

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

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 Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or

replacement of the affected.

* SDM

* SDM wiring harness

1. Ignition ON, verify the scan tool Primary Key Status displays Valid.

瀚慖f not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key. If the key does not match, perform

the Setup SDM Primary Key in BCM procedure.