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Pressure Regulator Control (PRC) Solenoid
- Disconnect intake air temperature sensor on dynamic chamber. Connect a 3000 ohms resistor to sensor connector. Disconnect coolant temperature sensor. Connect a 200 ohms resistor to sensor connector.
- Connect voltmeter between PRC solenoid Blue/Black wire and ground. With engine running, voltage should be less than 2.5 volts for 4 minutes after starting. After 4 minutes, voltage should be 12 volts. If not repair wiring or connection. See Fig 1
.
Courtesy of MAZDA MOTORS CORP.
- Disconnect vacuum hose from solenoid. Blow through port A. Ensure air exhausts through port B. See Fig 2
.
- Disconnect 2 wire connector from solenoid. Connect 12 volts to one terminal and ground the other terminal of solenoid. Blow air though port A. Ensure air exhausts through air filter.
Courtesy of MAZDA MOTORS CORP.