Initial Inspection and Diagnostic Overview
ON-VEHICLE INSPECTION
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 air filter
- 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 EXHAUST GAS CONTROL VALVE OPERATION
(a) Disconnect the air hose from the actuator.
(b) Using SST, apply approx. 49 kPa (0.50 kgf/sq. cm, 7.1 psi) of pressure to the actuator. SST 09992-00242
(c) Check that the actuator push rod moves.
(d) Reconnect the air hose to the actuator.
If operation is not as specified, replace the control valve assembly.
4. INSPECT TURBOCHARGING PRESSURE
(a) Using a 3-way connector, connect SST (turbocharger pressure gauge) to the hose between the gas filter and turbo pressure sensor. SST 09992-00242
(b) While driving with the engine running at 5,600 rpm or more with the throttle valve fully open in the 1st gear/L range, check the turbocharging pressure.
Standard pressure: 61 - 75 kPa (0.62 - 0.76 kgf/Sq. cm, 8.8 - 10.8 psi)
If the pressure is less than that specified, check the intake 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 VSV FOR INTAKE AIR CONTROL VALVE
6. INSPECT [1][2]VSV FOR WASTE GATE VALVE
7. INSPECT VSV FOR EXHAUST GAS CONTROL VALVE
8. INSPECT VSV FOR EXHAUST BYPASS VALVE
9. INSPECT TURBO PRESSURE SENSOR