Yamaha 2005 MT-01, Service Manual

Page: 365 / 435

FUEL INJECTION SYSTEM
7-50
Fault code No. 29 Symptom Decompression solenoid (thermistor): open or short cir-
cuit detected.
Diagnostic code No. 55 Decompression solenoid
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed state of decompression
solenoid. Check for looseness or pinching. Turning the
main switch to
“ON”.
2 Connections
• Decompression solenoid
(thermistor) 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
securely.
3 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between decompression
solenoid (thermistor) coupler
and ECU coupler
(green/red–green/red)
(black/blue–black/blue)
4 Defective decompression solenoid
(thermistor). • Execute the diagnostic mode.
(Code No.55)
• Replace if defective.
Refer to “CHECKING THE
DECOMPRESSION
SOLENOID” on page 7-105.
Fault code No. 30 Symptom The vehicle has overturned.
Diagnostic code No. 08 Lean angle cut-off switch
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
cannot be
restarted
unless the main
switch is first
turned “OFF”).
2 Installed condition of the lean angle
cut-off switch. Check for looseness or pinching.
3 Connections
• Lean angle cut-off switch 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
securely.
4 Defective lean angle cut-off switch. • Execute the diagnostic mode.
(Code No.08)
• Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE CUT-OFF
SWITCH” on page 7-100.