2010 Cadillac Truck SRX FWD V6-3.0L Page 603

2010 Cadillac Truck SRX FWD V6-3.0L Page 603

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Clear all DTCs and operate the steering column lock control module within the conditions for running the DTC. The DTC should not set.

If the DTC sets, reprogram the K60 Steering Column Lock Control Module. If the DTC resets, replace the K60 Steering Column Lock Control

Module.

Repair Instructions

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

* Steering Column Lock Control Module Replacement (ULS) (See: Steering and Suspension/Steering/Steering Column/Steering Column

Lock/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for steering column lock control module

replacement, setup and programming

B2955

DTC B2955

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 Descriptor

DTC B2955 00

- Security Sensor Data Circuit

Diagnostic Fault Information

Circuit/System Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized

by the exciter coils surrounding the ignition lock cylinder. The transponder transmits a signal to the body control module (BCM). The BCM then

compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the

engine control module (ECM). If the learned key code does not match or a transponder value is not received, the BCM will send the start disable

password to the ECM.

Conditions for Running the DTC

Ignition is in the Accessory or Run position.

Conditions for Setting the DTC

The BCM detects a circuit fault between itself and the immobilizer control module.

Action Taken When the DTC Sets

* Vehicle starting will be disabled.

* The security indicator in the instrument cluster will be illuminated. A service message will be displayed in the driver information center.

Conditions for Clearing the DTC

* A current DTC will be cleared when the condition for setting the DTC are no longer present.