Test No. 56: Power Door Lock System Does Not Operate When Using Manual Switch
- Check driver's door Electronic Control Unit (ECU) and body ECU for proper voltage and input signals. See DRIVER'S DOOR ELECTRONIC CONTROL UNIT and BODY ELECTRONIC CONTROL UNIT under PIN VOLTAGE TESTS. If proper voltage and input signals exist, go to next step. If proper voltage or input signal does not exist, repair as necessary and recheck power door lock system operation.
- Replace driver's door ECU or body ECU with a known-good body ECU and recheck power door lock operation. If power door lock operates properly, original ECU was defective. If power door lock still does not operate properly, check wiring harness and electrical connectors for an intermittent problem. Repair wiring harness or electrical connector as necessary.