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Test SC-4A - Checking Speed Control Operation

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Check connector for damaged, pushed out or miswired terminals. Repair as necessary. Perform TEST SC-VER . If connector is okay, ensure gear selector is in Drive. Using scan tool in ohmmeter mode, check resistance of Black PCM connector terminal A6, Park/Neutral Position (PNP) switch sense circuit (Black/White wire).
  2. If resistance is greater than 5 ohms, replace PCM. Perform TEST SC-VER . If resistance is less than 5 ohms, disconnect PNP switch connector. Check connector, and clean and repair as necessary. Perform TEST SC-VER .
  3. If connector is okay, using an external ohmmeter, check resistance of PNP switch sense circuit between Black PCM connector terminal A6, (Black/White wire) and ground. If resistance is greater than 5 ohms, replace PNP switch. Perform TEST SC-VER . If resistance is less than 5 ohms, repair short to ground in PNP switch sense circuit. Perform TEST SC-VER .
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