Variable Air Duct (VAD) Control Solenoid Valve Inspection
VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION1. 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.
2. Inspect the following wiring harness for open or short (continuity check).
Open circuit
- If there is no continuity, the circuit is open. 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, the circuit is shorted. 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