AB6 - Isolate Shorts In PCM

- Key "OFF".

- Breakout box installed.

- Reconnect Powertrain Control Module (PCM) to breakout box.

- Ignition Control Module (ICM) (Pins 1-6).

- Measure resistance between test pin 56 (PIP) and test pins 37 and 57 (short to power). Also test pins 40 and 60 (short to ground) at breakout box.

- Is each resistance greater than 500 ohms?

Yes -- Reconnect all components. Go to AB7. AB7 - Check Continuity of Ignition Ground Circuit

No -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)