NA5 - Check IDM Circuit For Shorts to Power (Excluding VREF)

- Key "OFF".

- Breakout box installed.

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

- Measure voltage between test pin 4 at the breakout box and battery negative post.

- Key "ON", engine "OFF".

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

- Is any 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 NA6. NA6 - Check IDM Circuit For Short to VREF and PIP