Turbocharger On-Vehicle Inspection

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Intake. Lexus Is250, Is220D. Gse20 Ale20

  1. INSPECT EXHAUST SYSTEM

  2. CHECK TURBOCHARGING PRESSURE

Turbocharger -- On-Vehicle Inspection



1. INSPECT EXHAUST SYSTEM

  1. Check for leaks or clogging between the cylinder head and turbocharger inlet, and also between the turbocharger outlet and exhaust pipe.

    Condition
    		Operation
    Deformed components
    		Repair or replace
    Foreign material in passages
    		Remove
    Leakage from components
    		Repair or replace
    Cracks in components
    		Check and replace


2. CHECK TURBOCHARGING PRESSURE


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Intake.Intake Air Control System.Turbocharger On-Vehicle Inspection

  1. Warm up the engine.

  1. Using a 3-way connector, connect SST (turbocharger pressure gauge) to the hose leading to the intake air connector.

    SST
    09992-00242

  1. While depressing the clutch pedal, fully depress the accelerator pedal down. Measure the turbocharging pressure at maximum speed (5,100 to 5,250 rpm).

    Standard pressure:
    48 to 53 kPa (0.49 to 0.54 kgf/cm2, 6.9 to 7.7 psi)
    If the pressure is less than the specified range, check both the intake and exhaust systems for leakage. If there is no leaks, check if the actuator hose is properly connected. If there is no problem with the hose, check the turbocharger. If the pressure is greater than the specified range, check if the actuator hose is properly connected, or is cracked. If there is no problem with the hose, check the turbocharger.