Yamaha MT-01 T 2005 Service Manual page 360

Fault code No. 19
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Main wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective sidestand switch.
Fault code No. 22
Diagnostic code No.
Order Item/components and probable
cause
1 Installed condition of air temperature
sensor.
2 Connections
• Air temperature sensor coupler
• Main wire harness ECU coupler
3 Open or short circuit in wire harness.
4 Defective air temperature sensor.
Symptom A break or disconnection of the blue/yellow lead of the
ECU is detected.
20 Sidestand switch
Symptom Air temperature sensor: open or short circuit detected.
05 Air temperature sensor
FUEL INJECTION SYSTEM
Check or maintenance job
• Execute the diagnostic mode.
(Code No.20)
• 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.
• Repair or replace if there is an
open or short circuit.
• Between ECU and blue/yellow
lead
• Replace if defective.
Refer to "CHECKING THE
SWITCHES" on page 7-89.
Check or maintenance job
Check for looseness or pinching. Turning the
• 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.
• Repair or replace if there is an
open or short circuit.
• Between air temperature
sensor coupler and ECU
coupler
(brown/white–brown/white)
(black/blue–black/blue)
• Execute the diagnostic mode.
(Code No.05)
• Replace if defective.
Refer to "CHECKING THE AIR
TEMPERATURE SENSOR" on
page 7-107.
7-45
Reinstatement
method
If the
transmission is
in gear,
retracting the
sidestand.
If the
transmission is
in neutral,
reconnecting
the wiring.
Reinstatement
method
main switch to
"ON".