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Diagnostic trouble code: P0444 “Undervoltage in control circuit of drive stage of Item No. Operation procedure Inspection results Follow-up procedure 1 Connect the diagnostic tester and
Proceed to next step. Yes Proceed to Step 4 2 Disconnect the connector of carbon No Proceed to next step. Yes Repair or replace the wiring harness. 3 Verify that the power supply circuit of No Proceed to Step 2 Yes Proceed to next step. 4 Inspect with multimeter to verify that . ℃ No Replace the control valve. Yes Refer to diagnosis help. 5 Inspect with multimeter to verify that No Proceed to next step. Yes Repair or replace the wiring harness. 6 Verify that the circuit between 2# pin No Refer to diagnosis help.
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