Suzuki DF 60 - Page 97

ENGINE CONTROL SYSTEM 3-49
CHART12: ENGINE CRANKED, BUT NOT START (OR STOPS SHORTLY
AFTER STARTING)
Before starting this troubleshooting, make sure that:
• There is no self-diagnostic code indication.
• Emergency stop switch plate is set in place.
START
< Ignition switch “ON” >
Check “30” terminal
voltage.
Is result OK?
(See page 3-38.)
< Cranking >
Check injector operating
sound.
Is result OK?
(See page 3-40.)
NO
< Ignition switch “OFF” >
Check fuel injector
resistance.
Is result OK?
(See page 3-39.)
YES
< Ignition switch “ON” >
Check “40, 39, 38 and 22”
terminal voltage.
Is result OK?
(See page 3-38.)
YES
< Cranking >
Check fuel injector
operating signal.
Is result OK?
(See page 3-40.)
YES
Fuel injector failure
< Ignition switch “ON” >
Check “37” terminal
voltage for 3 sec. after
switch ON.
Is result OK?
(See page 3-38.)
Possible cause:
Failure of high pressure
fuel system components.
NO
ECM main relay failure
YES
< Ignition switch “ON” >
Check “2” terminal voltage
Is result OK?
(See page 3-38.)
YES
YES
< Cranking >
Check ignition spark using
timing light.
(P/no. 09930-76420).
Is there light flashing?
< Ignition switch “OFF” >
• Check ignition primary
coil resistance.
(See page 3-39.)
• Check ignition secondary
coil resistance.
(See page 3-42.)
Are results OK?
Power supply wire (Gr)
failure
ECM failure
Fuel pump failure
NO
< Ignition switch “ON” >
Check fuel pump 3 sec.
operating sound.
Is result OK?
(See page 3-41.)
YES
< Cranking >
Check “37” terminal
voltage.
Is result OK?
(See page 3-38.)
Emergency stop switch
failure
Spark plug failure
< Individual check >
Check if spark plug is in
good condition.
Is result OK?
NO
Ignition coil failure
< Ignition switch “ON” >
Check “44 and 43 ”
terminal voltage.
Is result OK?
(See page 3-38.)
YES
< Cranking >
Check ignition coil operat-
ing signal.
Is result OK?
(See page 3-41.)
NO
NO
NO
YES
YES
NO
NO
YES
NO
YES
NO
NO
YES
NO
YES
NO