Buick Regal: Symptoms - Immobilizer
IMPORTANT: The following steps must be completed before using the
symptom tables.
1. Perform the Diagnostic System Check - Vehicle before using the symptom
tables in order to
verify that all of the following are true:
- There are no DTCs set.
- The control modules can communicate via the serial data links.
2. Review the system operation in order to familiarize yourself with the
system functions. Refer to
Immobilizer Description and Operation.
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the
systems.
- Inspect the easily accessible or visible system components for obvious
damage or conditions
which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to Testing for Intermittent Conditions and Poor Connections.
Symptom List
Refer to OnStar Stolen Vehicle Slowdown Active to diagnose the symptom.
ONSTAR STOLEN VEHICLE SLOWDOWN ACTIVE
Diagnostic Instructions
NOTE: This procedure is not used in Brazil.
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
Circuit/System Description
When a remote slow-down request is sent from OnStar, the Telematics
Communication Interface
Control Module sends a serial data message to the engine control module (ECM)
indicating that reduced
vehicle speed has been requested. Once the request is active, the ECM begins
reducing engine torque to
match requested vehicle speed and the REDUCED ENGINE POWER message is displayed.
Reference Information
Schematic Reference
OnStar/Telematics Wiring Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEW INDEX
Master Electrical Component List
Description and Operation
Remote Vehicle Speed Limiting Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Verification
1. Verify the vehicle is not in the OnStar initiated Stolen Vehicle Slow down
mode. This can be
accomplished by verifying the scan tool Telematics Enhanced Service
Immobilization parameter
is No.
- If the scan tool Telematics Enhanced Service Immobilization parameter
is Yes
- Perform the Remote Vehicle Speed Limiting Reset procedure with the scan
tool.
- Press the blue OnStar button and inform the advisor that you need to be
transferred to the
stolen vehicle team to update the vehicle account.
- Go to next step: If the scan tool BCM Telematics Enhanced Service
Immobilization
parameter is No
2. All OK.
READ NEXT:
Preliminary Procedure
Front Floor Console Replacement.
Theft Deterrent Module
Procedure
Disconnect the electrical connector.
Control Module References for programming and setup information, if
Keys can be programmed in various ways using the procedures outlined below.
Using the Replacing
Keys procedures will first erase all the known keys from the vehicle. Any
existing keys and any new
ke
SEE MORE:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
SPECIFICATIONS
FASTENER SPECIFICATIONS
Single Use Non-Threaded Fasteners/Components
NOTE:
All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW
after removal.
Application
O-Ring at PTU Output Shaft
O-Ring at Rear Differential Input Shaft
Retaining Ring at PTU Output