Variable Induction System: Testing and Inspection

VARIABLE INDUCTION AIR SYSTEM

Description


Power Valves 1 and 2

The power valves 1 and 2 are installed in intake manifold collector and used to control the suction passage of the variable induction air control system. They are set in the fully closed or fully opened position by the power valve actuators 1 and 2 operated by the vacuum stored in the vacuum tank. The vacuum to power valve actuators is controlled by the VIAS control solenoid valves 1 and 2.


Component Function Check


1. CHECK OVERALL FUNCTION-I

With CONSULT
1.Start engine and warm it up to the normal operating temperature.
2.Perform "VIAS S/V-1" in "ACTIVE TEST" mode with CONSULT.
3.Turn VIAS control solenoid valve 1 "ON" and "OFF", and check that power valve actuator 1 rod moves.










Without CONSULT
1.Start engine and warm it up to the normal operating temperature.
2.When revving engine up to 5,000 rpm quickly.
3.Check that power valve actuator 1 rod moves under the following conditions.















Is the inspection result normal?
YES- GO TO 2.
NO-.

2. CHECK OVERALL FUNCTION-II

With CONSULT
1.Perform "VIAS S/V-2" in "ACTIVE TEST" mode with CONSULT.
2.Turn VIAS control solenoid valve 2 "ON" and "OFF", and check that power valve actuator 2 rod moves.










Without CONSULT
1.When revving engine up to 5,000 rpm quickly.
2.Check that power valve actuator 2 rod moves under the following conditions.
















Is the inspection result normal?
YES- INSPECTION END
NO-.


Diagnosis Procedure


1. INSPECTION START

Confirm the malfunctioning system (power valve 1 or power valve 2). .
Which system is related to the incident?
Power valve 1-GO TO 2.
Power valve 2-GO TO 6.

2. CHECK VACUUM EXISTENCE-I

With CONSULT
1.Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2.Start engine and let it idle.
3.Perform "VIAS S/V-1" in "ACTIVE TEST" mode with CONSULT.
4.Turn VIAS control solenoid valve 1 "ON" and "OFF", and check vacuum existence under the following conditions.





Without CONSULT
1.Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2.Disconnect VIAS control solenoid valve 1 harness connector.
3.Start engine.
4.When revving engine up to 5,000 rpm quickly.
5.Check vacuum existence under the following conditions.





Is the inspection result normal?
YES- Repair or replace power valve actuator 1. Engine Control System.
NO- GO TO 3.

3. CHECK VACUUM TANK

1.Stop engine and disconnect vacuum hose connected to intake manifold collector.
2.Start engine and let it idle.
3.Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES- GO TO 4.
NO- Replace intake manifold collector. Intake Manifold Collector.

4. CHECK VACUUM HOSE

1.Stop engine.





2.Check vacuum hose for cracks, clogging, improper connection or disconnection. System Description.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair hoses or tubes.

5. CHECK VIAS CONTROL SOLENOID VALVE 1

P1800.
Is the inspection result normal?
YES- GO TO 9.
NO- Replace VIAS control solenoid valve 1. Engine Control System.

6. CHECK VACUUM EXISTENCE-II

With CONSULT
1.Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2.Start engine and let it idle.
3.Perform "VIAS S/V-2" in "ACTIVE TEST" mode with CONSULT.
4.Turn VIAS control solenoid valve 2 "ON" and "OFF", and check vacuum existence under the following conditions.





Without CONSULT
1.Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2.Disconnect VIAS control solenoid valve 1 harness connector.
3.Start engine.
4.When revving engine up to 5,000 rpm quickly.
5.Check vacuum existence under the following conditions.





Is the inspection result normal?
YES- Repair or replace power valve actuator 2. Engine Control System.
NO- GO TO 7.

7. CHECK VACUUM HOSE

1.Stop engine.





2.Check vacuum hose for cracks, clogging, improper connection or disconnection. System Description.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair hoses or tubes.

8. CHECK VIAS CONTROL SOLENOID VALVE 2

P1801.
Is the inspection result normal?
YES- GO TO 9.
NO- Replace VIAS control solenoid valve 2. Engine Control System.

9. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END