System Check

Start engine. Check Variable Resonance Induction System (VRIS) shutter valve actuator rod positions. For 626, see VACUUM DIAGRAMS article. For Millenia, see Figure . On all models, VRIS shutter rods should not be pulled. If VRIS shutter valve actuator rods are not pulled, go to step 4 . If VRIS shutter valve actuator rods are pulled, go to next step.
Turn ignition switch off. Connect New Generation Star (49-T088-0A0) scan tool to Data Link Connector (DLC) 2. DLC-2 is located under left side of instrument panel, right of steering column. Check for Diagnostic Trouble Codes (DTCs). See appropriate SELF-DIAGNOSTICS article. If any DTCs are present, repair as necessary. If DTCs are not present, go to next step.
Start engine and run at idle. Using select SIMULATION TEST. Turn both VRIS solenoid valves on using VRISV1 or VRISV2 selection. Listen for clicking noise from VRIS solenoids. If both VRIS solenoids click, check VRIS shutter valve actuators. If VRIS solenoids do not click, check VRIS SOLENOID VALVE .
Start engine and operate at idle. Check operation of shutter valve actuators No. 1 and 2 at specified engine speed. See VRIS RPM SPECIFICATIONS (MILLENIA & 626 2.5L) table. If actuators do not operate as specified, check for DTCs. See appropriate SELF-DIAGNOSTICS article. Repair as necessary. If no DTCs are present, check VRIS components and Throttle Position (TP) sensor.

VRIS RPM SPECIFICATIONS (MILLENIA & 626 2.5L)