FUEL SYSTEM <4D5-step
III
> -
Troubleshooting
13-35
INSPECTION PROCEDURE 13
The engine stalls during idling.
Probable cause
Probable causes can be found in troubles with control system, injection pump,
intake system, EGR system, and power supply.
D
Control system inoperative
D
Injection pump inoperative
D
Fuel system inoperative
D
Intake system inoperative
D
EGR system inoperative
D
Engine-ECU inoperative
NG
Repair
MUT-
II
Self-Diag code
Is a diagnosis code output?
YES
Inspection chart for diagnosis codes (Refer to P.13-9.)
NO
Conduct MUT-
II
Data list check and an actuator test.
(Refer to P.13-42, 46.)
OK
Inspect the following items in order:
D
Power supply system
D
Throttle body assembly
D
EGR system
D
Injection pump
INSPECTION PROCEDURE 14
Lack of output power
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, intake system, and EGR system.
D
Control system inoperative
D
Injection pump inoperative
D
Fuel system inoperative
D
Intake system inoperative
D
EGR system inoperative
D
Engine-ECU inoperative
NG
Repair
MUT-
II
Self-Diag code
Is a diagnosis code output?
YES
Inspection chart for diagnosis codes (Refer to P.13-9.)
NO
Conduct MUT-
II
Data list check and an actuator test.
(Refer to P.13-42, 46.)
OK
Inspect the following items in order:
D
Injection nozzle, fuel filter
D
Throttle body assembly
D
EGR system
D
Turbocharger
D
Compression pressure
D
Injection timing
D
Injection pump
D
Existence of mixing foreign objects (water, kerosene) with
the fuel
INSPECTION PROCEDURE 15
Occurrence of abnormal knocking
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, and EGR system.
D
Control system inoperative
D
Injection pump inoperative
D
Fuel system inoperative
D
EGR system inoperative
D
Engine-ECU inoperative
NG
Repair
MUT-
II
Self-Diag code
Is a diagnosis code output?
YES
Inspection chart for diagnosis codes (Refer to P.13-9.)
NO
Conduct MUT-
II
Data list check and an actuator test.
(Refer to P.13-42, 46.)
OK
Inspect the following items in order:
D
Injection nozzle
D
Injection timing
D
EGR system
D
Injection pump