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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Engine Controls - Tests W/Codes - 4.0L) >> Self-Diagnostic Tests >> Test NTC-10A - Checking Park/Neutral Position Switch

Test NTC-10A - Checking Park/Neutral Position Switch

WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST NTC-1A  before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION  at beginning of article. For wiring diagrams, see WIRING DIAGRAMS  at the end of this article. Perform TEST VER-2A  after each repair.
  1. Using scan tool, read park/neutral position switch input state. While watching scan tool display, move gear selector in and out of Park and Reverse positions. If display shows P/N and D/R, system is functioning properly. Test is complete. If display does not show P/N and D/R, go to next step.
  2. Turn ignition off. Place gear selector in Park position. Disconnect PCM 60-pin connector and ensure connector is clean and not damaged. Using scan tool in ohmmeter mode, check resistance on PCM 60-pin connector terminal No. 30, park/neutral switch sense circuit (Brown/Yellow wire on XJ and YJ bodies or Brown/White wire on ZJ body). Observe scan tool display while moving gear selector in and out of Park and Reverse positions.
  3. If display switches from less than 5 ohms to more than 5 ohms, replace PCM. If display does not switch from less than 5 ohms to more than 5 ohms, check if display stays less than 5 ohms. If display stays less than 5 ohms, repair short to ground in park/neutral switch sense circuit. If display does not stay less than 5 ohms, go to next step.
  4. Disconnect park/neutral switch connector and ensure connector is clean and not damaged. Using an external ohmmeter, check resistance of sense circuit (Brown/Yellow wire on XJ and YJ bodies or Brown/White wire on ZJ body) between park/neutral switch connector terminal No. 2 and PCM connector terminal No. 30. If resistance is less than 5 ohms, replace park/neutral switch. If resistance is more than 5 ohms, repair open in sense circuit.
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