Yamaha XV19SX(C), Service Manual

Page: 441 / 494

FUEL INJECTION SYSTEM
7-50
Fault code No. 28 Symptom Engine temperature sensor: open or short circuit detect-
ed.
Diagnostic code No. 11 Engine temperature sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed state of engine temperature
sensor. Check for looseness or pinching. Turning the
main switch to
“ON”.
2 Connections
• Engine temperature sensor coupler
• Main wire harness ECU coupler
• Sub-wire harness 2 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
and/or sub lead. • Repair or replace if there is an
open or short circuit.
• Between engine temperature
sensor coupler and ECU cou-
pler
(brown–brown)
(black–black)
4 Defective engine temperature sensor. • Execute the diagnostic mode.
(Code No.11)
• Replace if defective.
Refer to “CHECKING THE EN-
GINE TEMPERATURE SEN-
SOR” on page 7-87.
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 the lean angle
sensor. Check for looseness or pinching.
3 Connections
• Lean angle sensor coupler
• Main 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 7-85.