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Home >> GMC >> 2021 >> Acadia SL >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Battery, Starting System And Charging System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Stop/Start System Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no DTCs set related to the following component/system: Stop/Start System
    • Go to next step: If a related DTC is not set 
  3. Ignition/Vehicle & All vehicle systems - Off
    4. NOTE:

    The battery voltage should stabilize after a few minutes of turning the ignition/vehicle Off.

  4. Test for 12.4 to 12.8 V between the test points: Battery Positive Post & Battery Negative Post
    • Go to next step: If between 12.4 and 12.8 V 
  5. Verify the scan tool parameter: Stop/Start Select Switch = Inactive
    • If not the specified state 

      Refer to Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  6. Press and hold the switch: Stop/Start Select Switch

    Verify the scan tool parameter: Stop/Start Select Switch = Active

    • If not the specified state 

      Refer to Circuit/System Testing - Test 1

    • Go to next step: If the specified state 
  7. Press and release the switch: Stop/Start Select Switch

    Verify the component activates: Stop/Start Select Switch Indicator

    • If the component does not activate 

      Refer to Circuit/System Testing - Test 2

    • Go to next step: If the component activates 
  8. Verify the scan tool parameter:
    • Battery Sensor Module Battery State Information = Available
    • Battery Sensor Module Reset Occurred - Using Estimated State of Charge = No
    • If not the specified state 
    1. Refer to Battery Sensor Module Learn
    2. Road Test - Vehicle

      Verify the correct operation: Stop/Start System

      • Go to next step: If no condition exists
    3. All OK.
    • Go to next step: If the specified state 
  9. Road Test - Vehicle

    Verify the correct operation: Stop/Start System

    • Go to next step: If no condition exists 
  10. Verify the correct operation: Infotainment System State = Always On - During an autostart or autostop event
    • If a condition exists 

      Refer to Circuit/System Testing - Test 3

    • Go to next step: If no condition exists 
  11. All OK.
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