Yamaha Grizzly550 User Manual page 375

Fault
code Symptom
No.
Intake air temperature sen-
22 sor: open or short circuit
detected.
The vehicle has over-
30
turned.
Malfunction detected in the
33 primary lead of the ignition
coil.
Engine speed is high when
37
the engine is idling.
Fuel injector: open or short
39
circuit detected.
Lean angle sensor: open or
41
short circuit detected.
No normal signals are re-
42 ceived from the speed sen-
sor.
Power supply to the fuel in-
43 jector and fuel pump is not
normal.
Error is detected while
reading or writing on EE-
44
PROM (CO adjustment val-
ue).
Power supply to the fuel in-
46 jection system is not nor-
mal.
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Open or short circuit in wire harness.
• Defective intake temperature sensor.
• Malfunction in ECU.
• Improperly installed intake air temperature
sensor.
• The vehicle has overturned.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Malfunction in ignition coil.
• Malfunction in ECU.
• Malfunction in a component of ignition cut-
off circuit system.
• Open circuit in wire harness.
• Malfunction in throttle body.
• Malfunction in throttle cables.
• ISC valve is stuck fully open due to discon-
nected ISC unit hose or coupler. (High en-
gine idle speed is detected with the ISC
valve stuck fully open even though signals
for the valve to close are continuously being
transmitted by the ECU.)
• Malfunction in ECU.
• Fuel injection system fuse is blown.
• Open or short circuit in wire harness.
• Defective fuel injector.
• Improperly installed fuel injector.
• Open or short circuit in wire harness.
• Defective lean angle sensor.
• Malfunction in ECU.
• Open circuit in wiring harness.
• Defective speed sensor.
• Malfunction in vehicle speed sensor detect-
ed.
• Malfunction in the engine side of the neutral
switch.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Malfunction in ECU. (The CO adjustment
value is not properly written on or read from
the internal memory.)
• Malfunction in charging system. Refer to
"CHARGING SYSTEM" on page 9-11.
9-38
Diagnostic
code No.
d05
d08
d30
d54
d36
d08
d07
d09
d60
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