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Circuit/System Verification

NOTE: If the green LED is off with the ignition ON and the LED does not function when commanded with the scan tool, contact the OnStar® Center to confirm the vehicle has a current subscription.
  1. Ignition ON/vehicle in Service Mode.
  2. Verify no DTCs are set.
    • If no DTCs are set 
  3. Verify that the Green Indicator turns ON and OFF when commanding the Green Indicator ON and OFF with a scan tool.
    • If the Green Indicator does not turn ON and OFF 

      Refer to Circuit/System Testing - Green Indicator Test

    • If the Green Indicator turns ON and OFF 
  4. Verify that the Red Indicator turns ON and OFF when commanding the Red Indicator ON and OFF with a scan tool.
    • If the Red Indicator does not turn ON and OFF 

      Refer to Circuit/System Testing - Red Indicator Test

    • If the Red Indicator turns ON and OFF 
  5. All OK.
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