Test NTC-20: Checking Park/Neutral Switch
NOTE:
Possible causes are: Park/Neutral (P/N) switch sense circuit short to ground, P/N switch defective or PCM defective.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector C2 (located nearest to rear of vehicle). PCM is located to left of Power Distribution Center (PDC) in engine compartment. Disconnect Transmission Range Sensor (TRS) connector. TRS is located on transmission. See Fig 1 . Inspect electrical connectors and clean/repair as necessary. Inspect electrical connectors and clean/repair as necessary. Using a DVOM, check resistance of P/N switch sense circuit between PCM connector C2 terminal No. 76 (Black/White wire) and chassis ground. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair P/N switch sense circuit short to ground. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .
- Put transmission in Drive. Using a DVOM, check resistance of P/N switch sense circuit between PCM connector C2 terminal No. 76 (Black/White wire) and chassis ground. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .
- If no other potential causes are remaining, TRS is assumed to be defective. Replace TRS. Perform TEST VER-4A: SPEED CONTROL VERIFICATION .