Diagnosis & Repair
- Disconnect CMP sensor harness connector. Using ohmmeter, measure resistance between sensor connector terminals. Resistance should be 835-1400 ohms (cold sensor) or 1060-1645 ohms (hot sensor).
- Replace sensor as needed. If sensor is okay, inspect circuits between ECM and CMP sensor for open or short. See wiring diagram in WIRING DIAGRAMS article. Repair as needed. If both circuits are okay, remove sensor and inspect. Also inspect signal plate. Replace as needed. If both components are okay, replace ECM and retest.