2010 Cadillac Truck SRX FWD V6-3.0L Page 329
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Front Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Front Side Door Lock Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM and keyless entry control module
replacement, setup and programming
B302A
DTC B302A
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 B302A 00
- Mobile Telephone Communications Interface Requested Immobilization Malfunction
Circuit/System Description
As part of the vehicle telematics enhanced services, a request may be sent to the body control module (BCM) to disable vehicle starting. If a valid
message is received by the BCM requesting that starting be disabled, the start enable message will not be sent to the engine control module (ECM).
Conditions for Running the DTC
The BCM continuously monitors for this DTC.
Conditions for Setting the DTC
A valid start disable from telematics will set DTC B302A only as a history DTC.
Action Taken When the DTC Sets
Vehicle starting will be suspended and the security indicator will be illuminated.
Conditions for Clearing the DTC
* A current DTC will clear when the telematic start disable request is no longer seen.
* A history DTC will clear after 100 ignition cycles in which the telematic start disable request is not seen.
Diagnostic Aids
DTC B302A is only an indicator that a start disable request has been received from the vehicle telematics system and does not indicate a fault in the
immobilizer system. DTC will only set as a history.
Reference Information
Schematic Reference
Immobilizer Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Immobilizer
Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Immobilizer Description and Operation (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description and
Operation/Immobilizer)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
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