Diagnostic Procedure

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
   Fig 1: CONSULT-II Display - Active Test

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3. Turn VIAS control solenoid valve "ON" and "OFF", and make sure that power valve actuator rod moves.
   Fig 2: Identifying Power Valve Actuator

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Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Rev engine quickly up to above 3, 600 rpm and make sure that power valve actuator rod moves.

OK or NG

OK: INSPECTION END 

NG (With CONSULT-II): GO TO 2.

NG (Without CONSULT-II): GO TO  3.

Fig 3: Identifying Power Valve Actuator

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With CONSULT-II 

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

   VIAS SOL VALVE	Vacuum
   ON	Should exist
   OFF	Should not exist

   Fig 4: CONSULT-II Display - Active Test

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OK or NG

OK: Repair or replace power valve actuator.

NG: GO TO  4.

Without CONSULT-II 

1. Stop engine and disconnect vacuum hose connected to power valve actuator.
2. Disconnect VIAS control solenoid valve harness connector.
3. Start engine and let it idle.
4. Apply 12V of direct current between VIAS control solenoid valve terminals 1 and 2.
5. Check vacuum existence under the following conditions.
   VIAS TERMINALS REFERENCE
   
   

   Condition	Vacuum
   12V direct current supply	Should exist
   No supply	Should not exist

OK or NG

OK: Repair or replace power valve actuator.

NG: GO TO 4.

Fig 5: Applying 12V Of Direct Current Between VIAS Control Solenoid Valve Terminals

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1. Stop engine.
2. Check hoses and tubes between intake manifold and power valve actuator for crack, clogging, improper connection or disconnection. Refer to , "VACUUM HOSE DRAWING ".

OK or NG

OK: GO TO 5.

NG: Repair hoses or tubes.

Fig 6: Checking Hoses And Tubes

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Refer to , "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 6.

NG: Replace vacuum tank.

1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve harness connector.
3. Turn ignition switch ON.
   Fig 7: Identifying VIAS Control Solenoid Valve

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4. Check voltage between VIAS control solenoid valve terminal 1 and ground with CONSULT-II or tester.

   Voltage: Battery voltage 

OK or NG

OK: GO TO  8.

NG: GO TO 7.

Fig 8: Checking Voltage Between VIAS Control Solenoid Valve Terminal 1 And Ground

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Check the following.

• Harness connectors E110, M7
• Harness connectors M82, F102
• Harness for open or short between VIAS control solenoid valve and IPDM E/R
• Harness for open or short between VIAS control solenoid valve and ECM

: Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and VIAS control solenoid valve terminal 2. Refer to WIRING DIAGRAM.

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG

OK: GO TO 9.

NG: Repair open circuit or short to ground or short to power in harness or connectors.

Refer to , "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 10.

NG: Replace VIAS control solenoid valve.

Refer to , "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END