Diagnosis & Repair
- Disconnect CMP sensor connector. Using ohmmeter, measure resistance between sensor connector terminals. Resistance should be 985-1600 ohms (cold sensor) or 1265-1890 ohms (hot sensor).
- Replace sensor as necessary. If sensor is okay, inspect circuits between ECM and CMP sensor for open or short. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary.
- If both circuits are okay, remove and inspect sensor. Also inspect signal plate. Replace as necessary. If both components are okay, replace ECM and retest.