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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Rear Drive Axle >> Diagnostic Information and Procedures >> DTC C0393: Rear Axle Coupling Solenoid Valve >> Component Testing

Component Testing

  1. Disconnect the harness connector at the Q49 Rear Differential Clutch Solenoid Valve.
  2. Test for 2-4Ω between the control terminal 1 and control circuit terminal 2.
    • If not between 2-4Ω 

      Replace the Q49 Rear Differential Clutch Solenoid Valve.

    • If between 2-4Ω 
  3. All OK.
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