IGNB2 - Check For 1DM Short to Power

^ Key OFF.

^ Connect TFI Diagnostic Cable 007-00097, or equivalent to PCM breakout box, connect BAT- lead to negative post of battery, and connect TFI module tee to vehicle harness.

^ DVOM on DC volt scale.

^ Key ON.

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

^ Is voltage less than 0.5 volt DC?

YES -- GO to IGNB3. IGNB3 - Check For IDM Short to Ground

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