Air Control Solenoid Valve (ACV)
- Warm engine to operating temperature. Connect a jumper wire between coolant temperature switch terminals. Connect voltmeter between Yellow wire terminal of ACV solenoid valve and ground. See Fig 1
. Verify voltmeter indicates zero volts at 1500 RPM or greater. If voltage is not as indicated, check ECU terminal 2J. See PIN VOLTAGE CHART
S article in the ENGINE PERFORMANCE section.
Courtesy of MAZDA MOTORS CORP.
- Remove air control solenoid valve. Connect hoses to valve ports. Blow through hose "A" and verify air comes out of valve air filter. Apply battery power and ground to valve with jumper wires. Blow air through hose "A" and verify air comes out of port "B". See Fig 2
. Replace ACV solenoid valve if necessary.
Courtesy of MAZDA MOTORS CORP.