Yamaha PZ50W Service Manual page 282

Fault code No. 42
Diagnostic code No. 07 (speed sensor)
Order Item/components and probable cause
1 Connections
Speed sensor coupler
Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective speed sensor.
4 Gear for detecting vehicle speed has
broken.
FUEL INJECTION SYSTEM
Symptom No normal signals are received from the speed sensor.
Check or maintenance job
Check the couplers for any pins that may have
pulled out.
Check the locking condition of the couplers.
If there is a malfunction, repair it and connect the
coupler securely.
Repair or replace if there is an open or short cir-
cuit.
Between speed sensor coupler and ECU coupler.
Blue – Blue
White/Yellow – White/Yellow
Black/Blue – Black/Blue
Execute the diagnostic mode (code No. 07).
Replace if defective.
Refer to "SIGNAL SYSTEM" in CHAPTER 8.
Replace if defective.
Refer to "FRONT AXLE AND TRACK" in CHAP-
TER 4.
7-22
FI
Reinstatement
method
Starting the
engine, and
inputting the
vehicle speed
signals by oper-
ating the snow-
mobile at a low
speed of 20 to
30 km/h.