Yamaha Star XVS13AA(C) 2011 Service Manual page 463

Fault
code Symptom
No.
Malfunction detected in the
34 primary wire of the rear cyl-
inder ignition coil.
Engine speed is high when
37
the engine is idling.
Injector: open or short cir-
39
cuit detected.
Lean angle sensor: open or
41
short circuit detected.
No normal signals are re-
ceived from the speed sen-
sor.
42 Open or short circuit is de-
tected in the neutral switch.
Open or short circuit is de-
tected in the clutch switch.
The ECU is unable to moni-
tor the battery voltage (an
43
open or short circuit in the
line to the ECU).
Error is detected while
reading or writing on EE-
44
PROM (CO adjustment val-
ue).
Charging voltage is abnor-
46
mal.
Faulty ECU memory.
(When this malfunction is
50 detected in the ECU, the
fault code number might
not appear on the meter.)
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Open or short circuit in wire harness.
• Malfunction in rear cylinder ignition coil.
• Malfunction in ECU.
• Improperly installed rear cylinder ignition
coil.
• Open or short circuit in wire harness.
• Open or short circuit in sub-wire harness.
• Malfunction in throttle body.
• Malfunction in throttle cables.
• Incorrect speed sensor signal.
• Improperly installed ISC.
• ISC valve is stuck fully open due to discon-
nected ISC unit hose or coupler. (High en-
gine idling 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.
• Open or short circuit in wire harness.
• Defective injector.
• Malfunction in ECU.
• Improperly installed injector.
• Open or short circuit in wire harness.
• Defective lean angle sensor.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Defective speed sensor.
• Malfunction in speed sensor.
• Defective neutral switch.
• Malfunction in the engine side of the neutral
switch.
• Defective clutch switch.
• Improperly adjusted clutch lever.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Defection in fuel pump relay.
• Malfunction in ECU. (The CO adjustment
value is not properly written on or read from
the internal memory.)
Malfunction in the charging system. Refer to
"CHARGING SYSTEM" on page 8-17.
• Malfunction in ECU. (The program and data
are not properly written on or read from the
internal memory.)
8-56
Diagnostic
code No.
31
54
36
37
08
07
21
09
50
60
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