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 Connector End View Reference 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 Slowdown mode. This can be accomplished by verifying the scan tool K9 Body Control Module Telematics Enhanced Service Immobilization parameter is No. ⇒ If the scan tool K9 Body Control Module Telematics Enhanced Service Immobilization parameter is Yes 1.1. Perform the Remote Vehicle Speed Limiting Reset procedure with the scan tool. 1.2. 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 K9 Body Control Module Telematics Enhanced Service Immobilization parameter is No
2. All OK.