Function Test
- Turn off engine. Disconnect electrical connector from vacuum pump and valve assembly. Apply battery (+) power to terminal No. 2, and ground terminals No. 1 and 4. See Fig 1
. Ground terminal No. 3. If throttle does not fully open within 3 seconds, replace vacuum pump and valve assembly.
- If throttle fully opens within 3 seconds, remove battery (+) power from terminal No. 2. If throttle does not fully close within 3 seconds, check actuator. See ACTUATOR under TESTING. If actuator is okay, replace vacuum pump and valve assembly.
Courtesy of SUBARU OF AMERICA, INC.