Initial Inspection and Diagnostic Overview

ON-VEHICLE INSPECTION OF TURBOCHARGER

1. INSPECT INTAKE AIR SYSTEM
Check for leakage or clogging between the air cleaner and turbocharger inlet and between the turbocharger outlet and cylinder head.
- Clogged air cleaner .... Clean or replace the element
- Hoses collapsed or deformed .... 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
(a) Remove the air cleaner assembly (from the turbocharger).
(b) Disconnect the actuator hose.
(c) Using SST (turbocharger pressure gauge), apply approx. 0.66 kg/cm2 (9.4 psi, 65 kPa) of pressure to the actuator and check that the rod moves.

If the rod does not move, replace the turbocharger assembly.

SST 09992-00241

CAUTION:
- Never apply more than 0.8 kg/cm2 (11.4 psi 78 kPa) of pressure to the actuator.





4. CHECK TURBOCHARGING PRESSURE
(a) Using a 3-way connector, connect SST (turbocharger pressure gauge) to the hose leading to the intake manifold.

SST 09992-00241

(b) While driving with the engine running at 2,800 rpm or more with the throttle valve fully open in the second gear, check the turbocharging pressure

Standard pressure:
0.40 - 0.70 kg/cm2 (5.7 - 10.0 psi, 39 - 69 kPa)

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