DN3 - Check EVP Circuit Continuity

- Key "OFF".

- EGR Valve Position (EVP) 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 resistance between EVP circuit at the EVP sensor vehicle harness connector and test pin 27 at the breakout box.

- Is resistance less than 5.0 ohms?

Yes -- Go to DN4. DN4 - Check EVP Circuit For Short to Ground

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