Yamaha Star XVS13AA(C) 2011, Service Manual

Page: 476 / 536

FUEL INJECTION SYSTEM
8-69
Fault code No. 24 Symptom No normal signal is received from the O
2
sensor.
Diagnostic code No. — —
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of O
2
sensor. Check for looseness or pinching. Starting the en-
gine and oper-
ating it at idle.
2 Connections
• O
2
sensor coupler
• Wire harness ECU coupler
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
3 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between O
2
sensor coupler and
ECU coupler.
(gray/white–gray/white)
(red/white–red/white)
(gray/green–gray/green)
(black/blue–black/blue)
4 Check fuel pressure. • Refer to “CHECKING THE
FUEL PRESSURE” on page
7-14.
5 Defective O
2
sensor. • Replace if defective.
Fault code No. 30 Symptom The vehicle has overturned.
Diagnostic code No. 08 Lean angle sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 The vehicle has overturned. Raise the vehicle upright. Turning the
main switch to
“ON” (however,
the engine can-
not be restarted
unless the main
switch is first
turned “OFF”).
2 Installed condition of lean angle sen-
sor. Check for looseness or pinching.
3 Connections
• Lean angle sensor coupler
• Wire harness ECU coupler • Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
4 Defective lean angle sensor. • Execute the diagnostic mode.
(Code No. 08)
• Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 8-109.