Yamaha XT660 2004, Service Manual

Page: 353 / 463

7 - 9
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
30
The motorcycle has overturned. • Overturned motorcycle
• Malfunction in ECU
08
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
41
Open or short circuit is detected in the
lean angle cut-off switch. • Open or short circuit in wire harness
• Defective lean angle cut-off switch
• Disconnected lean angle cut-off switch coupler
• Malfunction in ECU
08
42
No normal signals are received from
the speed sensor or an open or short
circuit is detected in the neutral
switch. • Open or short circuit in wire harness
• Defective speed sensor
• Disconnected speed sensor coupler
• Malfunction in vehicle speed sensor detected unit
• Defective neutral switch
• Disconnected neutral switch connector
• Malfunction in the engine side of the neutral switch
• Malfunction in ECU
07
21
43
Power supply to the injector and fuel
pump is not normal. (The ECU is
unable to monitor the battery voltage.) • Open circuit in wire harness
• Malfunction in ECU
• Defective fuel injection system relay
09, 50