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Home › GMC › 2024 › Acadia Elevation, FWD › Repair and Diagnosis › Body & Frame › Body, Cab Control Systems › Secondary And Configurable Customer Controls › Diagnostic Information and Procedures › Drive Mode Switch Malfunction › Circuit/System Testing

Circuit/System Testing

  1. Ignition/Vehicle OFF, disconnect the S36 Dimmer Switch
  2. Ignition ON/Vehicle in Service Mode
  3. Verify a test lamp illuminates between ground circuit terminal 8 and B+.
    • If the test lamp does not illuminate 

      Repair the open/high resistance on the ground circuit or ground connection.

    • Go to next step: If the test lamp illuminates 
  4. Test for 4.8 - 5.2 V between signal circuit terminal 7 and ground.
    • If less than 4.8 V 
    1. Test circuit 2202 for a short to ground.
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found.
    2. Test circuit 2202 for an open/high resistance.
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found.
    3. Replace the K9 Body Control Module.
    • If greater than 5.2 V 
    1. Test circuit 2202 for a short to voltage.
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found.
    2. Replace the K9 Body Control Module.
    • Go to next step: If between 4.8 - 5.2 V 
  5. Replace the S36 Dimmer Switch.
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