No Response From Pcm With A No-Start Condition
NOTE:
For circuit identification and wiring diagram, see WIRING DIAGRAMS
article. If Powertrain Control Module (PCM) is replaced, PCM must be reprogrammed. See PROGRAMMING
. After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-1
under VERIFICATION TESTS to ensure system is functioning properly.
- Turn ignition off. Disconnect PCM connectors. PCM is located on left side of engine compartment, near front of battery. See Figure . Inspect connectors for damaged pins, corrosion and loose terminals. Repair connectors necessary. Using a test light connected to ground, probe terminal No. 46 (Orange/Red wire) at PCM C2 harness connector. See Fig 1 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Orange/Red wire between fuse No. 17 (20-amp) in Intelligent Power Module (IPM) on left side of engine compartment, next to battery. See Figure . Also inspect fuse No. 17 in IPM. See Figure .
- Turn ignition on. Using a test light connected to ground, probe terminal No. 20 (Pink/Gray wire) at PCM C1 harness connector. See Fig 2 . If test light illuminates brightly, power circuits are okay. Go to next step. If test light does not illuminate brightly, repair open fused ignition switch output circuit (Pink/Gray wire) between PCM and IPM.
- Turn ignition off. Using a test light connected to positive battery voltage, probe terminal No. 10 (Black/Brown wire) at PCM C1 harness connector. Also probe terminal No. 50 (Black/Dark Green wire) at PCM C2 harness connector. If test light illuminates brightly at both terminals, ground circuits are okay. Replace PCM. If test light does not illuminate brightly at one or both terminals, repair open in Black/Brown wire or Black/Dark Green wire between PCM and ground.