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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis >> Transmission >> Transfer Case - GETRAG 790 >> Diagnostic Information and Procedures >> DTC C0394 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the rear differential clutch control module.
  2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal 2 and ground:
    • If the test lamp illuminates, test the signal circuit for a short to voltage.
  3. Ignition OFF, test for infinite resistance between the signal circuit terminal 2 and ground:
    • If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the clutch assembly.
  4. Test for 310-113K ohms between the signal circuit terminal 2 and the low reference circuit terminal 4.
    • If less than the specified range, test both circuits for a short together. If the circuits test normal, replace the differential clutch drum assembly.
    • If greater than the specified range, test both circuits for an open/high resistance. If the circuits test normal, replace the differential clutch drum assembly.
  5. If all circuits test normal, replace the rear differential clutch control module.
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