Repair Section
2
–
121
(13) White smoke
Clogged air cleaner element
Description
White smoke is being exhausted.
Possible Cause
• Fuel filter
• Injector
• Supply pump
• EGR system
• Engine ECU
• Electronic control throttle
• Rail pressure sensor
1 Check the fuel filter. Replace the fuel filter.
2 Check each injector. (Refer to the injector check
procedure issued by the vehicle manufacturer.)
Repair or replace the injector and/or the corre-
sponding circuit.
3 Check the Exhaust Gas Recirculation (EGR)
system. (Refer to the EGR system check proce-
dure issued by the vehicle manufacturer.)
Repair or replace the EGR system.
4 Check the supply pump and the supply pump
drive circuit. (Refer to the supply pump drive cir-
cuit diagram issued by the vehicle manufac-
turer.)
Repair or replace the supply pump and drive cir-
cuit.
5 Check the rail pressure sensor and the corre-
sponding circuit. (Refer to the rail pressure sen-
sor check procedure issued by the vehicle
manufacturer.)
Repair or replace the rail pressure sensor and
the corresponding circuit.
6 Check the electronic control throttle and the cor-
responding circuit. (Refer to the electronic con-
trol throttle check procedure issued by the
vehicle manufacturer.)
Repair or replace the electronic control throttle
and/or the corresponding circuit.
Troubleshooting complete
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
To Next Page
Loading...
