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 given wiring harness for open or short circuit (continuity check).

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the harness.
- VAD control solenoid valve terminal B (harness-side) and PCM terminal 4C
- VAD control solenoid valve terminal A (harness-side) and main relay terminal C (harness-side)

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