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Home >> Mazda >> 1995 >> Millenia V6-2255cc 2.3L DOHC >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Idle/Throttle Speed Control Unit >> Testing and Inspection >> Component Tests and General Diagnostics >> BAC Valve
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BAC Valve





System Inspection
1. Connect the data link connector terminals TEN and GND by using a jumper wire.
2. Connect a tachometer to the data link connector terminal IG-.
3. Start the engine at engine cold condition.
4. Verify that the idle speed decreases gradually as the engine warms up.
5. If not, check the water hose of the BAC valve.
6. If water hose is OK. replace the BAC valve.

Removal / Installation
1. Disconnect the negative battery cable.
2. Drain the coolant from the radiator.
3. Remove the air charge cooler air duct.
4. Remove the resonance chamber.
5. Remove in the order shown in the figure.
6. Install in the reverse order of removal.
7. Refill the radiator with the specified engine coolant.




1. Air hose
2. Water hose
3. BAC valve
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