DL27 - Check PFE and SIG RTN Harness Circuit Continuity

- Key "OFF".

- Breakout box connected, Powertrain Control Module (PCM) disconnected.

- Pressure Feedback EGR (PFE) sensor disconnected.

- Measure resistance between PFE circuit at the sensor vehicle harness connector and test pin 27 at the breakout box.

- Measure resistance between PFE SIG RTN circuit at the sensor vehicle harness connector and test pin 46 at the breakout box.

- Is each resistance less than 5.0 ohms?

Yes -- Go to DL28. DL28 - Check PFE Harness Circuit For Shorts to Power

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