Suzuki DF150 Service Manual page 134

CHART 10: SELF-DIAGNOSTIC CODE "4-3" Fuel injector
START
<Ignition switch "ON">
Check "28" "36" "53" "54" terminal voltage.
Is result OK? (See page 3-48.)
YES
<Ignition switch "ON">
Check fuel injector operating signal.
Is result OK? (See page 3-54.)
YES
<Ignition switch "OFF">
Check fuel injector operating sound
(individual).
Is result OK? (See page 3-53.)
YES
Possible cause:
• ECM failure
• Wire continuity/connection failure
CHART 11: SELF-DIAGNOSTIC CODE "2-1" Throttle position sensor
START
<Ignition switch "ON">
Check throttle position sensor output
voltage change.
Is result OK? (See page 3-59.)
YES
Possible cause:
• ECM failure
• Wire continuity/connection failure
CHART 12: SELF-DIAGNOSTIC CODE "1-2" Shift position sensor
START
<Ignition switch "ON">
Check shift position sensor output voltage
change.
Is result OK? (See page 3-60.)
YES
Possible cause:
• ECM failure
• Wire continuity/connection failure
NO
• ECM failure
• Wire continuity/connection failure
NO
• ECM failure
• Wire continuity/connection failure
NO
• Fuel injector failure
NO
• Throttle position sensor failure
• Wire continuity/connection failure
NO
• Shift position sensor failure
• Wire continuity/connection failure
ENGINE CONTROL SYSTEM 3-75