AIS19 - Check For Vacuum at IMRC Solenoid Inlet Port

^ Disconnect IMRC solenoid inlet vacuum hose (bottom port).

^ Install a vacuum gauge at the IMRC solenoid vacuum harness inlet connector.

^ Is manifold vacuum present with the engine at idle?

YES -- Turn engine off. Go to AIS2O. AIS20 - IMRC Solenoid Functional Check

NO -- Inspect vacuum supply hose to IMRC solenoid. Service as necessary. Return to AIS13 after Service to confirm proper system function. AIS13 - Check Both Lt and Rt Bank IMRC Function at Idle