Mazda 6 Quiz
Fuel and emission control systems

Variable air duct (vad) control solenoid valve inspection (l3)

In this manual: Fuel and emission control systems
General information — 42Engine — 23Lubrication system — 10Cooling system — 9Fuel and emission control systems — 161Engine electrical system — 17Clutch — 21Manual transaxle — 10Automatic transaxle — 110Front and rear axles — 20Steering system — 15Braking system — 104Suspension — 34Body — 201Body electrical system — 287Heater and air conditioner systems — 89Technical data — 1Special tools — 1
~1min read

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 (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

Test yourself

A quick Mazda 6 quiz: every answer comes with an explanation and a link to the manual page.