Variable Induction System: Testing and Inspection

1. Start the engine.
2. Verify that the rods of the shutter valve actuator 1 and 2 are not pulled.
3. If the rods are pulled, do as follows.
(1) Stop the engine.
(2) Connect the SSTs (NGS).
(3) Verify that diagnostic trouble code No. P1521 or P1522 is not displayed. If code No. P1521 or P1522 is shown, carry out troubleshooting of the code No. P1521, P1522.
(4) If diagnostic trouble codes are not shown, start the engine and run it at idle.
(5) Select the SIMULATION TEST function on the NGS display.
(6) Turn the VRIS solenoid valve from OFF to ON by using the "VRISV1" or "VRISV2" and check if operation sound of the valve is heard.
(7) If the operation sound is heard, check the following.
- VRIS shutter valve actuators
(8) If the operation sound is not heard, check the following.
- VRIS solenoid valve
4. Check the rod operation under the following conditions.





Rod operation

5. If rod operation is not as specified, do as follows.
(1) Stop the engine.
(2) Connect the SSTs (NGS).
(3) Verify that diagnostic trouble code No. P1521 or P1522 is not displayed. If code No. P1521 or P1522 is shown, carry out troubleshooting of the code No. P1521, P1522.
(4) If diagnostic trouble codes are not shown, start the engine and run it at idle.
(5) Select the SIMULATION TEST function on the NGS display.
(6) Turn the VRIS solenoid valve from OFF to ON by using "VRISV1" or "VRISV2" and check if operation sound of the valve is heard.
(7) If the operation sound is heard, check the following.
- Loose or damaged vacuum hose
- VRIS shutter valve actuators
- Throttle position sensor
(8) If the operation sound is not heard, check the following.
- VRIS solenoid valve