Boost Solenoid: Testing and Inspection

Turbocharger Boost Control Solenoid Valve Inspection

Special Tools Required

- Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

1. Remove the charge air cooler.

2. Disconnect the hoses (A) from the turbocharger boost control solenoid valve (B), and connect the vacuum pump/gauge, 0-30 inHg (C) to the solenoid valve as shown.





3. Apply vacuum to the port.

- If it holds vacuum, release the vacuum, then go to step 4.
- If it does not hold vacuum, replace the turbocharger boost control solenoid valve Service and Repair.

4. Turn the ignition switch to ON (II).

5. Select TURBOCHARGER BOOST CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS.

6. Reapply vacuum to the port.

- If it holds vacuum, replace the turbocharger boost control solenoid valve Service and Repair.
- If it does not hold vacuum, go to step 7.

7. Turn the ignition switch to LOCK (0), then remove the vacuum pump/gauge from the turbocharger boost control solenoid valve.

8. Connect the vacuum pump/gauge (A) to the turbocharger boost control solenoid valve (B) as shown.





9. Apply vacuum to the port.

- If it holds vacuum, replace the turbocharger boost control solenoid valve Service and Repair.
- If it does not hold vacuum, go to step 10.

10. Turn the ignition switch to ON (II).

11. Select TURBOCHARGER BOOST CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS.

12. Reapply vacuum to the port.

- If it holds vacuum, the turbocharger boost control solenoid valve is OK.
- If it does not hold vacuum, replace the turbocharger boost control solenoid valve Service and Repair.