NA12 - Check PCM For Short to Ground

- Key "OFF".

- Breakout box installed.

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

- Ignition coil (non-Computer Control Dwell (CCD) only), ICM and Camshaft Position (CMP) sensor disconnected.

- Measure resistance between test pin 4 and test pins 40, 46 and 60 at breakout box.

- Is each resistance greater than 10,000 ohms?

Yes -- Remove breakout box. Reconnect all components. For further diagnosis, refer to Ignition Systems for Distributor Ignition (DI) Diagnostics.

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