DN116 - Check EVR Signal For Intermittent Short

- Vacuum gauge connected.

- Key On, Engine Running.

- Look for an increase in EGR valve vacuum while performing the following:

- With the engine at idle, wiggle the EGR Vacuum Regulator (EVR) solenoid harness between the EVR solenoid and dash panel and between dash panel and Powertrain Control Module (PCM).

- Does the EGR vacuum increase?

Yes -- Isolate and service short in EVR circuit. Remove vacuum gauge. Reconnect all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

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

No -- Reconnect vacuum hose to EGR valve. Go to DN117. DN117 - Check EVP Signal At PCM With Engine Idling