ALLDATA 2012 Cadillac Truck SRX FWD V6-3.6L Instructions
- June 3, 2024
- alldata
Table of Contents
2012 Cadillac Truck SRX FWD V6-3.6L
Instructions
2012 Cadillac Truck SRX FWD V6-3.6L
Vehicle> ALL Diagnostic Trouble Codes (OTC) > Testing and Inspection > B Code
Charts> B3902
IMMOBILIZER
DTC B3902
Diagnostic Instructions
- Perform the Diagnostic System Check – Vehicle See: Vehicle> Initial Inspection and Diagnostic Overview > Diagnostic System Check – Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis See: Vehicle > Initial Inspection and Diagnostic Overview > Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions See: Vehicle > Initial Inspection and Diagnostic Overview > Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
OTC B3902 00
– Incorrect Immobilizer Identifier Received
Circuit/System Description
When certain modules are programmed and configured during installation, the
module learns a specific environmen identifier which is unique to the vehicle.
The environment identifier is used to prevent the swapping modules between
vehicles. The body control module (BCM) is the keeper of the environment
identifier. The instrument cluste1 electronic brake control module (EBCM),
HVAC control module, sensing and diagnostic module (SDM), enginecontrol module
(ECM), and steering column lock control module, if equipped, each learn the
environment identifier during their configuration process. During vehicle
operation, each of these modules compare their environment identifier to that
of the BCM. If the identifiers match, vehicle starting is allowed. If an
environment identifier does no1 match, vehicle starting is disabled.
Conditions for Running the DTC
Ignition is in the ACCESSORY or RUN position.
Conditions for Setting the DTC
The control module’s environment identifier does not match the environment
identifier stored by the BCM.
Action Taken When the DTC Sets
- The security indicator in the instrument cluster will illuminate.
- Vehicle starting will be disabled.
Conditions for Clearing the DTC
A current OTC will be cleared when the module learns a correct environment
identifier.
Reference Information
Schematic Reference
Immobilizer Schematics See: Antitheft and Alarm Systems > Electrical >
Immobilizer Schematics
Connector End View Reference
Component Connector End Views See: Vehicle > Connector Views > Connector End
Views By Name
Description and Operation
Immobilizer Description and Operation See: Antitheft and Alarm Systems >
Components > Immobilizer
Electrical Information Reference
- Circuit Testing See: Vehicle > Component Tests and General Diagnostics > Circuit Testing
- Connector Repairs See: Vehicle > Component Tests and General Diagnostics > Connector Repairs
- Testing for Intermittent Conditions and Poor Connections See: Vehicle > Component Tests and General Diagnostics> Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs See: Vehicle > Component Tests and General Diagnostics > Wiring Repairs
Scan Tool Reference
Control Module References See: Vehicle > Programming and Relearning > Control
Module References for scan tool information
Circuit/System Verification
-
Perform the Programming and Setup procedure for the control module that set OTC B3902.
-
Verify OTC B3902 does not set after programming.
♦ If the DTC sets after programming
Replace the control module that set the OTC.
♦ If the DTC does not set after programming -
AII OK.
Repair Instructions
Perform the Diagnostic Repair Verification See: A L L Diagnostic Trouble Codes
( OTC) > Verification Tests > Diagnostic Repair Verification after completing
the repair.
Control Module References See: Vehicle > Programming and Relearning > Control
Module References for instrument cluster, EBCM, HVAC control module, SOM, ECM,
or steering column lock control module replacement, programming, and setup
Immobilizer (ALL Diagnostic Trouble Codes ( DTC ))- ALLDATA Repair
11/18/21, 1 :38 PM
https://my.alldata.com/repair/#/repair/article/50692/component/3926/itype/421/nonstandard/1386385/selfRefLink/false
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