Intake Air Control System

ON-VEHICLE INSPECTION





1. INSPECT INTAKE AIR CONTROL SYSTEM
a. Using a 3-way connector, connect vacuum gauge to the actuator hose.
b. Connect the hand-held tester to the DLC 3.
c. Start the engine.
d. Select the active test mode according to the message on the hand-held tester.





Vacuum

INSPECTION





1. INSPECT INTAKE AIR CONTROL VALVE ASSY NO.2
a. With 26.7 kPa (200 mm Hg, 7.9 inch Hg) of vacuum applied to the actuator, check that the actuator rod moves.
b. One minute after applying the vacuum, check that the actuator rod does not return.
c. If the operation is not as specified, replace the intake air control valve assembly No.2.

NOTICE: Do not adjust the adjust screw.

2. INSPECT INTAKE AIR CONTROL VALVE ASSY NO.3





a. Inspect actuator operation
1. With 26.7 kPa (200 mm Hg, 7.9 inch Hg) of vacuum applied to the actuator, check that the actuator rod moves.
2. One minute after applying the vacuum, check that the actuator rod does not return.
3. if the operation is not as specified, replace the intake air control valve No.3





b. Inspect VSV for continuity
1. Using an ohmmeter, check for continuity between the terminals.
Resistance: 37 to 44 Ohms at 20°C (68°F)
If there is no continuity, replace the VSV.





2. Inspect the VSV for ground.
^ Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.





3. Inspect the VSV operation.
^ Check that air flows from port E to the filter.





^ Apply battery voltage across the terminals.
^ Check that air flows from port E to F. If operation is not as specified, replace the VSV.





3. INSPECT AIR CLEANER CAP SUB-ASSY
a. Cover port C with your finger, and check that air flows from port B to port A.
b. Cover port C with your finger, and check that air does not flow from port A to port B.
c. Cover port A and C with your fingers, and apply 60 kPa (450 mm Hg, 18 inch Hg) of vacuum to port B. and check that there is no change of vacuum after one minute.
4. INSPECT VACUUM SWITCHING VALVE ASSY NO.1





a. Inspect the VSV for open circuit.
1. Using an ohmmeter, check that there is continuity between the terminals.
Resistance: 33 to 39 Ohms at 20°C (68°F)
If there is no continuity, replace the VSV.





b. Inspect the VSV for ground.
1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.





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





2. Apply battery voltage across the terminals.
3. Check that air flows from port E to port F. If operation is not as specified, replace the VSV.

1. INSPECT INTAKE AIR CONTROL SYSTEM




a. Using a 3 way connector, connect vacuum gauge to the actuator hose.
b. Connect the hand held tester to the DLC 3.
c. Start the engine.




d. Select the active test mode according to the message on the hand held tester.