Line Pressure Measurement

Line Pressure Measurement
- Set the parking brake and block both rear wheels securely.
- Raise the front of the car and support with safety stands.
- Run the engine at 2,000 rpm.
- Connect a vacuum pump to the vacuum tube of the vacuum modulator valve, and apply a vacuum of 500-600 mmHg.
- Measure the pressure line (under condition equivalent to throttle valve full close).
- Disconnect the vacuum tube from the vacuum modulator valve.
- Measure the line pressure (under condition equivalent to throttle valve full open).

NOTE: Before testing, be sure that the throttle B pressure is held within the specified limits.