AA25 - Check For IGN GND at CMP Sensor

^ Connect diagnostic harness CMP sensor tee to CMP sensor and vehicle harness.

^ Measure resistance between:
J35 (IGN GND) and J7 (B-) if 8 pin CMP sensor connector
or
J19 (IGN GND) and J7 (B-) if 4 pin CMP sensor connector.

^ Is resistance less than 5.0 ohms?


YES -- Service IGN GND between PCM and CMP sensor in harness for open. Remove all test equipment. Reconnect all components. Clear continuous memory. Rerun quick test.


NO -- Service IGN GND wire or replace CMP sensor. IGN GND open in CMP sensor. Remove all test equipment. Reconnect all components. Clear continuous memory. Rerun quick test.