Turbo

1. Disconnect the vacuum hose from the pressure sensor.

Pressure Sensor Inspection:

2. Connect a voltmeter to the "D" terminal of the pressure sensor.
3. Apply 100 mmHg (3.9 inHg) of vacuum to the pressure sensor.
4. Turn on the ignition switch and check the voltmeter reading. The reading should be 1.9-2.1 volts at 100 mmHg (3.9 inHg).
5. Replace the pressure sensor if necessary.