Turbocharger: Testing and Inspection

INTAKE CHARGE PRESSURE CHECK




1. Removing the black hose from the No.1 turbocharger wastegate solenoid or the brown connector, install the pressure gauge to this hose. Cap the nipple of solenoid after removing the black hose.




2. Disconnect the black connector of No.2 turbocharger wastegate solenoid.
3. When the engine speed reaches approximately 3000 r/min or more with the throttle fully opened in the second gear, measure the boost pressure.

Standard value: 85 - 159kPa (12.4 - 23.0 psi)

4. If the boost pressure is lower than the standard, check the following possible causes.
a. Turbocharger wastegate actuator malfunction
b. Boost pressure leakage
c. Turbocharger malfunction

5. If the boost pressure is higher than the standard, check on the following areas because the boost pressure control might be abnormal.
a. Turbocharger wastegate actuator malfunction
b. Wastegate regulating valve malfunction
c. Rubber hose of turbocharger wastegate actuator disconnected or cracked




6. Connect the black connector of No.2 turbocharger wastegate solenoid.




7. If the diagnostic trouble code is stored during the check, use scan tool MB991958 to eliminate the diagnosis code.