Variable Air Duct (VAD) Control System Operation Inspection

Variable Air Duct (VAD) Control System Operation Inspection

1. Connect WDS or equivalent to DLC-2.
2. Access ECT, TP_REL and RPM PIDs.
3. Start the engine.
4. Verify ECT PID is 70 degrees C {158 degrees F} or over.
5. Inspect shutter valve operation under the following conditions.

VAD Shutter Valve Operation:

If the shutter valve operation is not as specified, inspect as follows:
1. Verify that DTC P2676 or P2677 is not displayed.
- If DTC P2676 or P2677 is shown, perform DTC inspection. Diagnostic Trouble Code Descriptions

2. Inspect VAD control solenoid valve.
- If the VAD control solenoid valve is not okay, replace VAD control solenoid valve.
- If the VAD control solenoid valve is okay, inspect the following:
- Vacuum hose looseness or damage
- Vacuum chamber cracks or damage
- Shutter valve actuator.
- Shutter valve is stuck open or closed.