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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC P0645, P0646, or P0647 >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On / Vehicle - In Service Mode
  2. Perform the scan tool control function:A/C Compressor Clutch Relay - On and Off

    Verify the component turns On and Off:Q2 A/C Compressor Clutch

    • If the component does not turn On and Off 

      Refer to: Circuit/System Testing

    • Go to next step: If the component turns On and Off 
  3. All OK.
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