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Diagnostic trouble code: P0647 “Overvoltage in control circuit of A/C Item No. Operation procedure Inspection results Follow-up procedure 1 Connect the diagnostic tester and adaptor
Proceed to next step Yes Proceed to Step 4 2 Pull out the A/C relay, turn the ignition No Proceed to next step. Yes Repair or replace the wiring harness 3 Check if the power supply circuit of relay No Proceed to Step 2 Yes Replace the relay 4 Inspect with multimeter to check if the No Proceed to next step Yes Repair or replace the wiring harness 5 Check if the circuit between the control No Refer to diagnosis help
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