Test NTC-11A - Checking Park/Neutral Switch
WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION
in this article. For wiring diagram, see WIRING DIAGRAMS
section at the end of this article.
- Using scan tool, read park/neutral switch input state. While watching scan tool display, move gear selector in and out of Park and Reverse. If scan tool displays P/N and D/R, system is functioning properly. Test is complete.
- If scan tool does not display P/N and D/R, turn ignition off. Place gear selector in Park. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 30, park/neutral switch sense circuit (Black/White wire). Observe scan tool display while moving gear selector in and out of Park and Reverse.
- If display switches from less than 5 ohms to more than 5 ohms, replace PCM. Perform TEST VER-2 . If display does not switch from less than 5 ohms to more than 5 ohms, check if display always stays less than 5 ohms. If display always stays less than 5 ohms, repair short to ground in Brown/Orange wire, Brown/Yellow wire or Black/White wire. Perform TEST VER-2 . If display does not always stay less than 5 ohms, go to next step.
- Disconnect park/neutral switch connector. Using external ohmmeter, check resistance of sense circuit (Black/White wire) between park/neutral switch connector and PCM connector terminal No. 30. If resistance is less than 10 ohms, replace park/neutral switch. Perform TEST VER-2 . If resistance is more than 10 ohms, repair the open Brown/Orange wire, Brown/Yellow wire or Black/White wire. Perform TEST VER-2 .