Initial Inspection and Diagnostic Overview

1. INSPECT INTAKE AIR SYSTEM.
- Check for leakage or clogging between the air cleaner housing and turbocharger inlet and between the turbocharger outlet and cylinder head.
- Clogged air cleaner.... Clean or replace element.
- Hoses collapsed or deformed.... Repair or replace.
- Leakage from connections .... Check each connection and repair.
- Cracks in components .... Check and replace.

2. INSPECT EXHAUST SYSTEM.
- Check for leakage or clogging between the cylinder head and turbocharger inlet and between the turbocharger outlet and exhaust pipe.
- Deformed components .... Repair or replace.
- Foreign material in passages .... Remove.
- Leakage from components .... Repair or replace.
- Cracks in components .... Check and replace.

3. INSPECT ACTUATOR OPERATION.
- Disconnect the actuator hose.



- Using a turbocharger pressure gauge (SST 09992-00241), apply approximately 61 kPa (8.8 psi) of pressure to the actuator and check that the rod moves.
- If the rod does not move, replace the turbocharger assembly.

NOTICE: Never apply more than 81 kPa (0.83 kgf/cm2, 11.8 psi) of pressure to the actuator.

4. CHECK TURBOCHARGING PRESSURE.
- Using a 3-way connector, connect a turbocharger pressure gauge (SST 09992-00241), to the hose between the intake manifold and MAP sensor.



- While driving with the engine running at 2,800 rpm or more with the throttle valve fully open in 3rd gear, check the turbocharging pressure.

Standard pressure: ... 49 - 81 kPa (7.1 - 11.8 psi).

- If the pressure is less than that specified, check the intake air and exhaust systems for leakage. If there is no leakage, replace the turbocharger assembly.
- If the pressure is above specification, check if the actuator hose is disconnected or cracked. If not, replace the turbocharger assembly.

5. INSPECT IMPELLER WHEEL ROTATION.
- Refer to "Turbocharger Unit Inspection".
- Component Tests and General Diagnostics

6. INSPECT VSV FOR TURBOCHARGING PRESSURE CONTROL.
7. INSPECT MAP SENSOR.
- Manifold Pressure/Vacuum Sensor