Turbocharger; On-Vehicle Inspection - Toyota 1HD-FT Repair Manual

ENGINE - TURBOCHARGER SYSTEM
TURBOCHARGER
ON - VEHICLE INSPECTION
EG-97
.....
-.
wI
EGR System
w/o
EGR System
1. INSPECT INTAKE AIR SYSTEM
Check for leakage or clogging between the air cleaner
housing and turbocharger inlet and between the tur-
bocharger outlet and cylinder head.
• Clogged air cleaner .... Clean or replace element
• Hoses collapsed or deformed Repair or replace
• Leakage from connections Check each con-
nection 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 turboch-
arger 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.
CHECK TURBOCHARGING PRESSURE
(a) Warm up engine.
(b) Using a 3 -way connector. connect SST (turbochar-
ger pressure gauge) to the hose between the vacuum
pipe and intake pipe.
SST 09992-00241
(c) Press in the clutch pedal. then press the accelerator
pedal down as far as it will go. Measure the turbochar-
ging pressure at maximum speed (4.400 rpm).
Standard pre••ure:
38.6 - 50.0 kPa (0.39 - 0.50 kgf/cm", 5.6 - 7.3
p.i)
If the pressure is less than that specification. check
the intake air and exhaust systems for leakage.
If there is no leakage. replace the turbocharger assem-
bly.
If the pressure is above specification, check if the
actuator hose is disconnected or cracked. If not. re-
place the turbocharger assembly.