DTC P0705: Park/Neutral Position Switch
- Check Power Circuit - Turn ignition off. Disconnect inhibitor switch wiring harness connector. See Fig 1. Turn ignition on. Measure voltage between inhibitor switch connector terminal No. 3 (Green wire) and ground. See Fig 2. If battery voltage is present, go to next step. If battery voltage is not present, check 7.5-amp fuse No. 30. If fuse is okay, repair Green wire circuit between inhibitor switch and fuse panel.
- Check Input Signal Circuit - Turn ignition off. Disconnect A/T control unit wiring harness connector. Check continuity between inhibitor switch connector terminals No. 7 (Brown wire) and No. 9 (Black/Red wire) and A/T control unit terminal No. 19. If continuity is not present, repair harness or connectors between inhibitor switch and A/T control unit.
- Check Inhibitor Switch
- Disconnect inhibitor switch harness connector. Turn ignition on. Using a voltmeter, check for voltage at inhibitor switch harness connector as follows:
- With gear selector in Park, continuity should be present between connector terminals No. 3 (Green wire) and 4 (Blue wire).
- With gear selector in Reverse, continuity should be present between connector terminals No. 3 and 5 (Light Green wire).
- With gear selector in Neutral, continuity should be present between connector terminals No. 3 and 6 (Black/White wire).
- With gear selector in Drive, continuity should be present between connector terminals No. 3 and 7 (Brown wire).
- With gear selector in "2", continuity should be present between connector terminals No. 3 and 8 (Red wire).
- With gear selector in "1", continuity should be present between connector terminals No. 3 and 9 (Black/Red wire).
If continuity is not as specified, replace inhibitor switch. If continuity is as specified, disconnect system harness connectors and inspect for damage or corrosion. Check ECM pins and terminals for damage or corrosion. Repair as necessary and retest.