Variable Air Duct (VAD) Control Solenoid Valve Inspection

VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION







1. Remove the VAD control solenoid valve. (See INTAKE AIR SYSTEM REMOVAL/INSTALLATION.)
2. Inspect airflow between the ports under the following conditions.
- If not as specified, replace the VAD control solenoid valve.
- If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection




1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION.)
2. Inspect the following wiring harness for open or short circuit (continuity check).




California emission regulation applicable ATX model




Except for California emission regulation applicable ATX model

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the harness.
- VAD control solenoid valve terminal B and PCM terminal 68*1, 4C*2
- VAD control solenoid valve terminal A and main relay terminal C

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the harness.
- VAD control solenoid valve terminal B and body GND
- VAD control solenoid valve terminal A and power supply

*1 : California emission regulation applicable ATX model
*2 : Except for California emission regulation applicable ATX model