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Home >> Buick >> 2018 >> Envision Base >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> Stop/Start System Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify no DTCs are set.
    • Go to next step: If no DTCs are set 
  3. Ignition ON.
  4. Test for greater than 12 V between the battery positive terminal and negative terminal.
    • Go to next step: If greater than 12 V 
  5. Verify the scan tool parameter:
    • Battery Sensor Module Battery State Information parameter reads Available.
    • Battery Sensor Module Reset Occurred - Using Estimated State of Charge reads No.
    • If not the specified value 
    1. Disconnect and reconnect the C1 Battery Negative cable.
      NOTE:

      Allowing the vehicle to sit undisturbed for 3 h will automatically perform a Battery Sensor Learn upon the next engine cranking event. This will allow the battery state of charge to be relearned.

    2. Wait a minimum of 3 hours.
    3. Start the engine.
    4. Test drive the vehicle.

      Verify the Stop/Start System is functioning correctly.

      • Go to next step: If No Conditions exists
    5. All OK.
    • Go to next step: If the Specified Value 
  6. Test drive the vehicle.

    Verify the Stop/Start System is functioning correctly.

    • Go to next step: If No Conditions exists 
  7. Verify the infotainment system remains active during a start/stop event.
    • If the infotainment system turns off or restarts during a start/stop event. 

      Refer to Circuit/System Testing - Power Supply Transformer Circuit Malfunction

    • Go to next step: If the infotainment system remains active during a start/stop event 
  8. All OK.