Test NTC-10A - Checking Park/Neutral Switch

WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. 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 DIRECTORY . For wiring diagrams, see WIRING DIAGRAMS .

Using DRB, read park/neutral switch input state. While watching DRB display, move gear selector in and out of Park and Reverse positions. If display shows P/N and D/R, system is functioning correctly. Test is complete. If display does not show P/N and D/R, go to next step.
Turn ignition off. Place gear selector in Park position. Disconnect Powertrain Control Module (PCM) connector. Put DRB in ohmmeter mode. Using DRB, check resistance on PCM connector terminal No. 30 (Brown/Yellow wire on AA and AP bodies, Brown/Light Blue wire on AJ body). Observe DRB display while moving gear selector in and out of Park and Reverse positions.
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 does not always stay less than 5 ohms, go to next step. If display always stays less than 5 ohms, repair short to ground in appropriate wire. Perform TEST VER-2.
Disconnect park/neutral switch connector. Using an external ohmmeter, check resistance of sense circuit (Brown/Yellow wire on AA and AP bodies, Brown/Light Blue wire on AJ body) 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 open in appropriate wire. Perform TEST VER-2.