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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 350 (Rear Drive Axle) >> Diagnostic Information and Procedures >> DTC C1230 or C1231: Left/Right Rear Drive Clutch System Performance (G99) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC C1230 or C1231 is not set.
    • If any of the DTCs are set 
    1. Ignition OFF.
    2. Allow 30 min for the clutch to cool completely down.
    3. Perform key cycle, ignition OFF then ON.
    4. Clear DTC.
    5. Verify DTC C1230 or C1231 is not set.
      • If any of the DTCs are set, replace K47 Rear Differential Clutch Control Module.
      • If none of the DTCs are set.
    6. All OK.
    • If none of the DTCs are set 
  3. All OK.
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