Check Pressure Sensor

Using new dry cell batteries, connect the battery positive terminal to terminal No. 6 and the battery ground terminal to terminal No. 8, and connect the circuit tester positive terminal to terminal No. 7 and the circuit tester ground terminal to terminal No. 8.
NOTE:
- Using a circuit tester, check that the initial voltage of each dry-cell battery is 1.6 V or more. And also check that the voltage of three batteries in series is between 4.8 - 5.2 V.
- For power supply, 5 V DC constant voltage power source can also be used.
Courtesy of SUBARU OF AMERICA, INC.

Check the voltage at a normal atmospheric pressure.

NOTE: The atmospheric pressure at higher altitude is lower than normal. Therefore, the voltage is lower than the standard value.

Terminal No.	Standard
7 (+) and 8 (-)	Approx. 3.5 V (when 25°C (77°F))

Connect the battery positive terminal to terminal No. 3 and the battery ground terminal to terminal No. 4, and check that there is a voltage drop from the voltage measured in step 2) when the vacuum pump is operated.

Courtesy of SUBARU OF AMERICA, INC.