Powertrain Control Module
NOTE:
For circuit identification and wiring diagram, see WIRING DIAGRAMS
article. 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 harness connectors. PCM is located on left side of engine compartment, near air filter housing. See Fig 1 . Connect a test light between ground and fused battery voltage circuit (Red/White wire) at PCM C2 harness connector terminal No. 46. See Fig 2 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused battery voltage circuit.
- Turn ignition on. Connect a test light between ground and fused ignition switch output circuit (Dark Blue/White wire) at PCM C1 harness connector terminal No. 20. See Fig 3 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused ignition switch output circuit.
- Turn ignition off. Using a test light connected to battery positive, individually probe the following ground circuits:
- Black/Tan wire at PCM C1 harness connector terminal No. 10.
- Black/Tan wire at PCM C2 harness connector terminal No. 47.
- Black/White wire at PCM C2 harness connector terminal No. 50.
If test light illuminates at each ground circuit, ground circuits are okay. Test is complete. If test light does not illuminate at each ground circuit, repair open in appropriate ground circuit.