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 (see REMOVAL ).
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 in illustration.
   Fig 1: Identifying Vacuum Pump/Gauge And Turbocharger Boost Control Solenoid Valve

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   NOTE: This view is from the rear of the engine compartment.
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 (see TURBOCHARGER BOOST CONTROL SOLENOID VALVE REPLACEMENT  ).
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 (see TURBOCHARGER BOOST CONTROL SOLENOID VALVE REPLACEMENT  ).
   • 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 in illustration.
   Fig 2: Identifying Vacuum Pump/Gauge And Turbocharger Boost Control Solenoid Valve

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   NOTE: This view is from the rear of the engine compartment.
9. Apply vacuum to the port.
   • If it holds vacuum, replace the turbocharger boost control solenoid valve (see TURBOCHARGER BOOST CONTROL SOLENOID VALVE REPLACEMENT  ).
   • 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 (see TURBOCHARGER BOOST CONTROL SOLENOID VALVE REPLACEMENT  ).