Yamaha 2002 TDM900, Service Manual

Page: 384 / 475

7-21
FUEL INJECTION SYSTEM
FI
Fault code No.
42
Symptom
A. No normal signal are received from the speed sensor.
B. Open or short circuit is detected in the neutral switch.
Diagnostic monitoring
d N
A 07 Speed sensor
code No.
B 21 Neutral switch
Order Item / components Check or maintenance job Restore
method
A-1 Connected state of connector
Speed sensor coupler
Main wiring harness ECU coupler
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely. Reinstated by
starting the
engine, and
inputting the
vehicle speed
i l b
A-2 Open or short circuit in lead wire. Repair or replace if there is an open or short
circuit.
Main wiring harness
Blue - Blue
White / Yellow - White
Black / Blue - Black / Blue
signals by
operating the
motorcycle at
a 20 to 30
km / h.
A-3 Gear for detecting vehicle speed has
broken. Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
A-4 Defective speed sensor Execute the diagnostic monitoring mode.
(Code No. 07)
Replace if defective.
Refer to “FUEL INJECTION SYSTEM” in
chapter 8.
B-1 Connected state of connector
Neutral switch coupler
Main wiring harness ECU coupler
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Reinstated by
starting the
engine, and
inputting the
vehicle speed
i l b
B-2 Open or short circuit in lead wire. Repair or replace if there is an open or short
circuit.
Main wiring harness
Sky blue / Sky blue
signals by
operating the
motorcycle at
a 20 to 30
km / h
B-3 Faulty shift drum (neutral detection area) Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
km / h.
B-4 Defective neutral switch Execute the diagnostic monitoring mode.
(Code No. 21)
Replace if defective.
Refer to “CHECKING THE SWITCHES” in
chapter 8.