Diagnosis & Repair
- Disconnect CMP harness connector. Using ohmmeter, measure resistance between connector terminals. See Fig 1. Resistance should be 985-1600 ohms (cold sensor) and 1265-1890 ohms (hot sensor).
- Replace sensor as needed. If sensor is okay, inspect circuits between ECM and sensor for open or short. See wiring diagram in the WIRING DIAGRAMS article. Repair as needed.
- If both circuits are okay, inspect sensor installation. If sensor is NOT okay, replace CMP sensor. If sensor is okay, replace ECM and retest. ECM is located behind center console.