Charge Air Cooler By-Pass (CACBYP) Solenoid Valve
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Remove CACBYP solenoid valve. See Figure . Apply air pressure to each port of CACBYP solenoid valve. See Fig 1 . Air should flow through ports "B" and "C" only. Using fused jumper wires, apply battery voltage to CACBYP solenoid valve terminals. Apply air pressure to each port of CACBYP solenoid valve. Air should flow through ports "A" and "B" only. If CACBYP solenoid valve operation is not as specified, replace CACBYP solenoid valve.