Variable Air Duct (VAD) Control System Operation Inspection
- Connect the M-MDS to DLC-2.
- Access ECT, TP_REL and RPM PIDs.
- Start the engine.
- Verify ECT PID is 70°C {158°F} or over.
- Inspect shutter valve operation under the following conditions:
VAD shutter valve operation
VAD SHUTTER VALVE OPERATIONEngine speed Above 6,000 RPM with TP_REL PID less than 60% Below Above Shutter valve Close Open - If the shutter valve operation is not as specified, inspect the following:
- Verify that DTC P2676 or P2677 is not displayed.
- If DTC P2676 or P2677 is displayed, perform DTC inspection. (See DTC TABLE ).
- Inspect VAD control solenoid valve. (See
VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION
).
- If the VAD control solenoid valve is not normal, replace VAD control solenoid valve.
- If the VAD control solenoid valve is normal, inspect the following:
- Vacuum hose looseness or damage
- Vacuum chamber crack or damage
- Shutter valve actuator. (See VARIABLE AIR DUCT (VAD) SHUTTER VALVE INSPECTION ).
- Shutter valve stuck open or close