Yamaha FJR1300A - Page 454

FUEL INJECTION SYSTEM
8-51
19
A break or disconnection of
the black/red lead of the
ECU is detected.
• Open or short circuit in front cowling wire
harness.
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Defective relay unit (diode).
20
21
Coolant temperature sen-
sor: open or short circuit
detected.
• Open or short circuit in wire harness.
• Defective coolant temperature sensor.
• Malfunction in ECU.
• Improperly installed coolant temperature
sensor.
06
22
Intake air temperature sen-
sor: open or short circuit
detected.
• Open or short circuit in wire harness.
• Defective intake temperature sensor.
• Malfunction in ECU.
• Improperly installed intake air temperature
sensor.
05
24
No normal signal is re-
ceived from the O
2
sensor.
• Open or short circuit in sub-wire harness.
• Open or short circuit in front cowling wire
harness.
• Open or short circuit in wire harness.
• Defective O
2
sensor.
• Malfunction in ECU.
• Improperly installed O
2
sensor.
—
30
Latch up detected.
No normal signal is re-
ceived from the lean angle
sensor.
• The vehicle has overturned.
• Defective lean angle sensor.
• Malfunction in ECU.
• Improperly installed lean angle sensor.
08
31
The amount of air-fuel ratio
feedback compensation is
maintained continuously in
the vicinity of the upper lim-
it (lean air-fuel ratio).
• Open or short circuit in sub-wire harness.
• Open or short circuit in front cowling wire
harness.
• Open or short circuit in wire harness.
• Fuel pressure too low.
• Clogged injectors.
• Defective O
2
sensor (unable to output a rich
signal).
• Malfunction in ECU.
• Malfunction in other areas of the fuel sys-
tem.
01
32
The amount of air-fuel ratio
feedback compensation is
maintained continuously in
the vicinity of the lower limit
(rich air-fuel ratio).
• Open or short circuit in sub-wire harness.
• Open or short circuit in front cowling wire
harness.
• Open or short circuit in wire harness.
• Fuel pressure too high.
• Faulty injectors (excessive injection vol-
ume).
• Defective O
2
sensor (unable to output a
lean signal).
• Malfunction in ECU.
• Malfunction in other areas of the fuel sys-
tem.
01
Fault
code
No.
Symptom Probable cause of malfunction
Diagnostic
code No.
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