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Home >> Mazda >> 1995 >> 929 V6-3.0L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Idle Speed/Throttle Actuator - Electronic >> Testing and Inspection
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Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

BYPASS AIR CONTROL (BAC) VALVE
Air Valve / Inspection
1. Disconnect the air hose.






2. Blow through the BAC valve from port A and check the air flow.

- Cold engine: Air flows.
- Warm engine: Air does not flow.


Idle Air Control Valve / Inspection
1. Disconnect the idle air control valve connector.






2. Connect an ohmmeter to the idle air control valve terminals.
3. Check the resistance.

Resistance: 10.7-12.3 ohms at 20°C (68°F)

Operational Inspection
1. Start the engine and run it at idle.
2. Disconnect the idle air control valve connector.






3. Verify that the engine speed decreases.






4. Check air valve operation. Pinch the air hose to the BAC valve as shown and verify that the engine speed decreases.
5. Connect the idle air control valve connector.




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