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Home >> Plymouth >> 1995 >> Acclaim 2.5 K >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L Flex Fuel >> Test NTC-11A >> Checking Park/Neutral Switch

Checking Park/Neutral Switch

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL article.
  1. Using scan tool, read park/neutral 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 correctly. 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 Powertrain Control Module (PCM) connector. Put scan tool in ohmmeter mode. Using scan tool, check resistance on PCM connector terminal No. 30, (Brown/Light Blue wire on AJ body and AA body) or (Black/Orange wire on AS 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. 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.
  4. Disconnect park/neutral switch connector. Using an external ohmmeter, check resistance of Brown/Light Blue wire on AA body without flexible fuel between park/neutral switch connector and PCM connector terminal No. 30. If resistance is less than 5 ohms, replace park/neutral switch. Perform TEST VER-2.
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