NB4 - Check IDM Circuit For Short to Power (Excluding VREF)

- Key "OFF".

- Breakout box installed.

- Powertrain Control Module (PCM) and Ignition Control Module (ICM) (Pins 1-6) disconnected.

- "Key On".

- Measure voltage between test pin 4 and test pin 40 or 60 at the breakout box.

- Is voltage reading greater than 10.5 volts?

Yes -- Service short circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Go to NB5. NB5 - Check IDM Circuit For Shorts to VREF and PIP