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Home >> GMC >> 2021 >> Terrain SL >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Door Lock Indicator Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Operate the component: S13D Door Lock Switch - Driver - Lock Switch & Unlock Switch

    Verify the component operates in both directions:

    • A23D Door Latch Assembly - Driver = Lock & Unlock
    • A23P Door Latch Assembly - Passenger = Lock & Unlock
    • Go to next step: If all functions work properly 
  3. Operate the component: Driver Door - Open and close the door.

    Verify the scan tool parameter: Driver Door Ajar Switch = Active & Inactive

    • Go to next step: If the parameter state changes 
  4. Operate the component: Passenger Door - Open and close the door.

    Verify the scan tool parameter: Passenger Door Ajar Switch = Active & Inactive

    • Go to next step: If the parameter state changes 
  5. Operate the component: S13D Door Lock Switch - Driver - Lock Switch & Unlock Switch

    Verify the component turns On and Off: Door Lock Switch Indicator

    • If the component does not turn On and Off 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If the component works as specified 
  6. Operate the component: S13P Door Lock Switch - Passenger - Lock Switch & Unlock Switch

    Verify the component turns On and Off: Door Lock Switch Indicator

    • If the component does not turn On and Off 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If the component works as specified 
  7. All OK.