DN117 - Check EVP Signal At PCM With Engine Idling

- Key "OFF".

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

- Install breakout box and connect PCM to breakout box.

- Key On, Engine Running.

- Measure voltage between test pin 27 and test pin 46 at the breakout box while performing the following:

- With engine at idle, tap and wiggle the EGR Valve Position (EVP) sensor and connector.

- Does the voltage increase above 0.67 volt?

Yes -- Remove EGR assembly and inspect for contamination, carbon deposits, binding and other damage. Service as necessary. If EGR valve is OK, replace EVP sensor. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Unable to duplicate and/or identify fault at this time. For further diagnosis using the EEC-IV monitor box or Scan Tool, refer to Normal Scan Data Values.