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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Wheel drive shaft outer joint inspection
Disassembly Procedure
Remove the outer constant velocity (CV) joint and boot from the wheel
drive shaft. Refer to Front Wheel
Drive Shaft Outer Joint and Boot Replacement.
Remove any lubricant from the CV joint.
Fig. 64: Taping Gently On Brass Drift With A Hammer In Order To Tilt Cage
NOTE:
Liftgate window replacement
Special Tools
J 24402-A Glass Sealant (Cold Knife) Remover
J 39032 Stationary Glass Removal Tool
Use a urethane adhesive systems which meet GM Specification GMW 15672
Removal Procedure
WARNING: Refer to Cracked Window Warning
NOTE: Before
cutting out a stationary window, apply a double layer o
