Service manual

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FI
FUEL INJECTION SYSTEM
EAS00906
Diagnostic monitoring code table
Fault
code No.
Symptom Probable cause of malfunction Diagnostic code
12
No normal signals are received from
the crankshaft position sensor.
• Open or short circuit in wire harness
• Defective crankshaft position sensor
• Disconnected crankshaft position sensor coupler
• Malfunction in A.C. magneto rotor
• Malfunction in ECU
• Improperly installed crankshaft position sensor
—
13
Open or short circuit is detected in the
intake air pressure sensor.
• Open or short circuit in wire harness
• Defective intake air pressure sensor
• Disconnected intake air pressure sensor coupler
• Malfunction in ECU
03
14
Faulty intake air pressure sensor
hose system.
• detected hose
• clogged hose
• Disconnected, clogged, kinked, or pinched intake air
pressure sensor hose
• Defective intake air pressure sensor
• Malfunction in ECU
03
15
Open or short circuit is detected in the
throttle position sensor.
• Open or short circuit in wire harness
• Defective throttle position sensor
• Disconnected throttle position sensor coupler
• Malfunction in ECU
• Improperly installed throttle position sensor
01
16
Stuck throttle position sensor is
detected.
• Stuck throttle position sensor
• Improperly installed throttle position sensor
• Malfunction in ECU
01
19
Open circuit in the input line (blue/
black lead) of ECU is detected when
the start switch is pushed.
• Open circuit in wire harness (ECU coupler)
• Malfunction in ECU 20
21
Open or short circuit is detected in the
coolant temperature sensor.
• Open or short circuit in wire harness
• Defective coolant temperature sensor
• Disconnected coolant temperature sensor coupler
• Malfunction in ECU
• Improperly installed coolant temperature sensor
06
22
Open or short circuit is detected in the
intake air temperature sensor.
• Open or short circuit in wire harness
• Defective intake air temperature sensor
• Disconnected intake air temperature sensor coupler
• Malfunction in ECU
• Improperly installed intake air temperature sensor
05
24
No normal signal is received from the
O
2
sensor.
• Open or short circuit in wire harness.
• Defective O
2
sensor.
• Improperly installed sensor.
• Malfunction in ECU.
—
30
The motorcycle has overturned. • Overturned motorcycle
• Malfunction in ECU
08
31
The amount of air-fuel ratio feedback
compensation is maintained continu-
ously in the vicinity of the upper limit
(lean air-fuel ratio).
• Open or short circuit in wiring harness.
• Fuel pressure too low.
• Clogged injectors.
• Defective O
2
sensor (unable to output a rich signal).
• Malfunction in other areas of the fuel system.
• Malfunction in ECU.
—
32
The amount of air-fuel ratio feedback
compensation is maintained continu-
ously in the vicinity of the lower limit
(rich air-fuel ratio).
• Open or short circuit in wiring harness.
• Fuel pressure too high.
• Faulty injectors (excessive injection volume).
• Defective O
2
sensor (unable to output a lean signal).
• Malfunction in other areas of the fuel system.
• Malfunction in ECU.
—
33
Open circuit is detected in the primary
lead of the ignition coil.
• Open circuit in wire harness
• Malfunction in ignition coil
• Malfunction in ECU
• Malfunction in a component of ignition cut-off circuit sys-
tem
30