ENGINE ME CHA NICAL
-
Turbocharger Diagnosis
[12H-
TI
EM·17
TU RBOCHARGER DIAG NOSIS [1 2H-T]
I N S U FF I C IENT ACCELERAT I O N , LACK OF POWER OR
EXCES S I VE F U E L CONS U MPTION
NOTE: Before troubleshooting the turbocharger. first check the valve clearance,
injection timing.
etc.
IPossible Cause)
ICheck Procedure and Correction Method)
PRESSURE
Check turbocharging pressure. (See page
EM-381
Turbocharging pressure:
0.39 - 0.53
kg/cm�
RESTRICTED I NTAKE AIR SYSTEM
3.
LEAK IN INTAKE AIR SYSTEM
4.
RESTRICTED EXHAUST SYSTEM
6.
LEAK IN EXHAUST SYSTEM
6.
ERRATIC TURBOCHARGER
(5.5
-
7.3
psi.
38 -
52
kPa)
If
nat within specification, begin diagnosis from
Item
2.
Check i n take air system, and repair or
replace parts as necessary. ISee page
EM-401
Check in take air system. and repair or
replace parts
85
necessary. (See page
EM-401
Check exhaust system, and repair or replace
paris as necessary. Isee page
EM-401
Check exhaust system. and repair Or replace
paris as necessary. (See page
EM-401
Check rotation of i m peller wheel. If it does not turn
or turns with heavy drag, replace the turbocharger
assembly
Check. axial play of impeller wheel.
ISee page
EM-43)
Axial play:
0.13
mm
10.0061
in.) or less
If nol within specification, replace the turbocharger
assembly.
