Checking Powertrain Control Module (PCM) Power & Ground Circuits (NGC)
WARNING: This page is about a different car, the 2002 Dodge Durango and 2002 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
DO NOT probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal-to-pin connection. Install Miller Special Tool (8815) to perform diagnosis.
- Turn the ignition off. Disconnect the PCM C1 harness connector. Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the appropriate terminal of the Special Tool. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair the Fused B+ circuit for an open. Check related fuses and repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER-1 (NGC) under VERIFICATION TESTS.
- Turn the ignition on, with the engine off. Using 12-volt test light connected to ground, probe the Fused Ignition Switch Output circuits in the appropriate terminals of the Special Tool. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair the Fused Ignition Switch Output circuit(s) for an open. Check related fuses and repair as necessary. Perform POWERTRAIN VERIFICATION TEST VER-1 (NGC) under VERIFICATION TESTS.
- Turn the ignition off. Using 12-volt test light connected to battery voltage, probe the PCM ground circuits in the appropriate terminals of the Special Tool. If test light illuminates brightly, test is complete. If test light does not illuminate brightly, repair the PCM ground circuit(s) for an open. Perform POWERTRAIN VERIFICATION TEST VER-1 (NGC) under VERIFICATION TESTS.