Main Air Bleed Control Solenoid Valve Testing
- Warm up engine and run at idling speed. Connect a tachometer to the engine. Disconnect the connector from the throttle sensor and connect a jumper wire to "A" and "C" terminals of the connector.
- Connect a voltmeter to the main air bleed control solenoid (Brown) terminal and ground. Increase the engine speed and observe the meter reading. At any engine speed between idle and 3000 RPM, voltage should be approximately 12 volts.
- Between 3000-4000 RPM, voltage should be below 2 volts. At more than 4000 RPM, voltage should be approximately 12 volts. Disconnect the jumper wire connected to "A" and "C" terminals and connect the connector to the throttle sensor.
- Position the vehicle securely on a rolling road-tester. Increase the vehicle speed and observe the voltmeter reading. At speeds below 50 MPH, voltage should be approximately 12 volts. Above 50 MPH, voltage should be less than 2 volts.