DL7 - Check PFE/DPFE Circuit For Short to Power

- Key "OFF".

- Pressure Feedback EGR (PFE) / Differential Pressure Feedback EGR (DPFE) sensor disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure the resistance between test pin 27 and test pins 26, 37 and 57 at the breakout box.

- Is each resistance greater than 10,000 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect PFE/DPFE sensor. 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)