Intake Charge Pressure Check
WARNING: This page is about a different variant/trim than selected.
Required Special Tools:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- 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.
- Disconnect the black connector of No. 2 turbocharger wastegate solenoid.CAUTION: Two persons should be in the vehicle when the test is conducted; the person in the passenger seat should read the indications shown by the pressure meter.
- When the engine speed reaches approximately 3, 000 r/min or more with the throttle fully opened in the second gear, measure the intake charge pressure.
Standard value: 85 - 159 kPa (12.4 - 23.0 psi)
- If the intake charge pressure is lower than the standard, check the following possible causes.
- Turbocharger wastegate actuator malfunction
- Turbocharger wastegate regulating valve malfunction
- Intake charge pressure leakage
- Turbocharger malfunction
- Turbocharger bypass valve malfunction
- If the intake charge pressure is higher than the standard, check on the following areas because the intake charge pressure control might be abnormal.
- Turbocharger wastegate actuator malfunction
- Turbocharger wastegate regulating valve malfunction
- Rubber hose of turbocharger wastegate actuator disconnected or cracked
- Connect the black connector of No. 2 turbocharger wastegate solenoid.
- If the diagnostic trouble code is stored during the check, use scan tool MB991958 to eliminate the diagnostic trouble code.