FUEL SYSTEM <4D5-step
III
> -
Troubleshooting
13-32
INSPECTION PROCEDURE 5
No initial combustion (unable to start)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
glow system, and power supply system.
D
Control system inoperative
D
Injection pump inoperative
D
Intake system inoperative
D
Glow 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
Check the following items in order:
D
Glow plug, glow plug relay
D
Battery
D
Injection nozzle
D
Throttle body assembly
D
Injection pump
D
Compression pressure
D
Existence of mixing foreign objects (water, kerosene) with
the fuel
INSPECTION PROCEDURE 6
Starting performance is bad when the engine is cold
(unable to start)
Probable cause
Probable causes can be found in troubles with control system, injection pump,
fuel system, intake system, and glow system.
D
Control system inoperative
D
Injection pump inoperative
D
Fuel system inoperative
D
Intake system inoperative
D
Glow 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
Glow plug, glow plug relay
D
Injection nozzle, fuel filter
D
Throttle body assembly
D
Existence of starter switch signal input
D
Engine oil
D
Injection pump
D
Existence of mixing foreign objects (water, kerosene) with
the fuel