IGNB3 - Check For IDM Short to Ground

^ Key OFF.

^ Disconnect PCM.

^ DVOM on ohm scale.

^ Measure resistance between Pin 23 (IDM) and Pin 7 (BAT-).

^ Is resistance greater than 10K ohms?

YES -- GO to IGNB4. IGNB4 - Check For IDM Open In Harness

NO -- Service IDM short to ground in harness between PCM connector and Ignition Control Module connector. Remove all test equipment. Reconnect all components. Clear continuous memory. Rerun quick test.