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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Engine Controls - System & Component Testing) >> Air Induction Systems >> Air Charging Pressure Control - MILLENIA 2.3L >> Charge Air Cooler By-Pass (System Check)

Charge Air Cooler By-Pass (System Check)

WARNING: This page is about a different car, the 2001 Mazda Protege, 2001 Mazda Millenia, 2001 Mazda MX-5 Miata, 2001 Mazda MPV, and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect scan tool to DLC-2. Start engine and verify charge air cooler by-pass actuator rod is retracted. See Figure .
  2. Select SIMULATION TEST function. Select CACBYP. Using SIMULATION TEST function, turn off CACBYP and ensure actuator rod returns. If actuator rod operation is not as specified, turn ignition off. Go to next step.
  3. Turn ignition on. Using SIMULATION TEST function, ensure operation sound of Charge Air Cooler By-Pass (CACBYP) solenoid valve. If operation sound of CACBYP solenoid valve is not heard, replace CACBYP solenoid valve. If operation sound of CACBYP solenoid valve is heard, check following:
    • Vacuum hose damaged or loose.
    • Vacuum pump.
    • Damaged actuator diaphragm.
    • Sticking shutter valve.

    Repair as necessary.

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