A22 - Check For IGN GND Open In Harness

^ Disconnect diagnostic harness ICM tee from ICM only; leave ICM tee connected to vehicle harness.

^ Measure resistance between Pin 16 (IGN GND) of PCM harness connector and J9 (IGN GND) at the breakout box.

^ Is resistance less than 5.0 ohms?


YES -- Replace ICM. Remove all test equipment. Reconnect all components. Clear continuous memory. Rerun quick test.


NO -- Service ignition ground open between PCM and ICM in harness. Remove all test equipment. Reconnect all components. Clear continuous memory. Rerun quick test.