Acoustic Control Induction System (ACIS)

INSPECTION

1. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR




a. Connect the MITYVAC (hand-held vacuum pump) to the actuator.
b. Apply a vacuum of 39.9 kPa (300 mmHg, 11.8 in.Hg) to the actuator and check that the actuator rod moves.
c. One minute after applying the vacuum, check that the rod's position is the same as in step (a).

If the result is not as specified, replace the IAC valve actuator.

2. INSPECT VACUUM TANK




a. Connect the MITYVAC (hand-held vacuum pump) to port A.
b. Apply a vacuum of 66.7 kPa (500 mmHg, 20 in.Hg) to the vacuum tank.
c. One minute after applying the vacuum, check that the pressure does not change.

If the result is not as specified, replace the vacuum control valve set.

3. INSPECT VACUUM SWITCHING VALVE ASSEMBLY FOR IAC VALVE







a. Measure the VSV resistance.




b. Check the VSV operation.
1. Check that air flows from port E to the filter.

If the result is not as specified, replace the VSV assembly.




2. Apply battery positive voltage across the terminals.
3. Check that air flows from port E to port F.

If the result is not as specified, replace the VSV assembly