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.
READ NEXT:
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
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
SEE MORE:
Special Tools
EL-38826 SIR Deployment Harness
For equivalent regional tools, refer to Special Tools.
Live and Undeployed Air Bag
WARNING: Refer to SIR Inflator Module Handling and Storage Warning
Take special care when handling or storing an undeployed air bag. An air bag
deployment produces a rapi
Driver Side Shown, Passenger Side Similar
Low-Beam Headlamp
Turn Signal Lamp
High-Beam Headlamp
Parking Lamp
High-Beam Headlamp/ Low-Beam Headlamp
Open the hood. See Hood
Remove the headlamp bulb
access cover.
Turn the bulb counterclockwise
and pull straight back.
Disconnect t