Chevrolet Trax: 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 Schematics (Encore) , OnStar/Telematics Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX
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
- Verify the vehicle is not in the OnStar initiated Stolen Vehicle Slowdown 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.
- If the scan tool BCM Telematics Enhanced Service Immobilization parameter is No
- All OK.
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Immobilizer - Repair instructions
THEFT DETERRENT MODULE REPLACEMENT (ENCORE)
Fig. 3: Theft Deterrent Module (Encore)
Theft Deterrent Module Replacement (Encore)
THEFT DETERRENT MODULE REPLACEMENT (TRAX)
Fig. 4: Theft Deterrent
Immobilizer - Description and operation
IMMOBILIZER DESCRIPTION AND OPERATION
Fig. 5: Immobilizer Diagram Without BTM
The immobilizer system functions are provided by the body control module (BCM)
and the engine control
module (ECM), as
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Vehicle Identification
Vehicle Identification Number (VIN)
This legal identifier is in the front
corner of the instrument panel, on
the left side of the vehicle. It can be
seen through the windshield from
outside. The VIN also appears on
the Vehicle Certification and Service
Parts labels and certificates of title
and re
Personalization Menu (Radio
without Touchscreen)
The audio system controls and
touchscreen are used to access the
personalization menus for
customizing vehicle features.
The following are all possible
personalization features. Depending
on the vehicle, some may not be
available.
CONFIG (Configuration): Press to
access the Configuration
Settings
