Diagnostic Aids
- Unwanted or inadvertent door lock/unlock activation may be requested by the OnStar® Remote Link application. It is possible that a customer may be unaware of account usage, resulting in an unwanted or phantom door lock/unlock. If normal system diagnosis results in an inability to verify the customer's concern, contact Technical Assistance Center (TAC).
- If the vehicle has a current DTC that illuminates the malfunction indicator lamp (MIL), the cause of the DTC must be diagnosed before proceeding with the Remote Vehicle Start Inoperative diagnostic.
- Only the first and second vehicle transmitters are able to control the remote vehicle start function.
- The remote vehicle start system will not operate if any of the following conditions are present:
- A current vehicle DTC that illuminates the malfunction indicator lamp (MIL)
- The vehicle is in valet mode
- More than 2 remote starts have been attempted
- The hazard switch is in the ON position
- A current hazard switch DTC is set
- The vehicle hood is ajar
- A current hood ajar DTC is set
- Incorrect BCM software is installed and vehicle start is not enabled
- The content theft deterrent system detects an alarm trigger
- Excessive engine RPM
- Excessive coolant temperature
- Accelerator pedal position greater than 0 percent
- Vehicle not in park
- Vehicle theft deterrent malfunction
- A current automatic transmission shift lock control system DTC is set
- A vehicle speed sensor signal is detected by the ECM