DD23 - Check Solenoid Circuit: Short to Power/Short to Ground

- Key "OFF".

- Solenoid disconnected.

- Breakout box installed. Powertrain Control Module (PCM) disconnected.

For EGR Atmospheric (EGRA) solenoid:

- Measure resistance between test pin 12 and test pins 37 and 57 at the breakout box.

- Measure resistance between test pin 12 and test pins 40 and 60 at the breakout box.

For EGR Vacuum (EGRV) solenoid:

- Measure resistance between test pin 33 and test pins 37 and 57 at the breakout box.

- Measure resistance between test pin 33 and test pins 40 and 60 at the breakout box.

- Is each resistance greater than 10,000 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect solenoid. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

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