Yamaha Diagnostic Tool; Connecting The Yamaha Diagnostic Tool - Yamaha WR250F 2022 Owner's Service Manual

EAM30285

YAMAHA DIAGNOSTIC TOOL

This model uses the Yamaha diagnostic tool to identify malfunctions.
For information about using the Yamaha diagnostic tool, refer to the operation manual that is included
with the tool.
TIP
A generic scan tool can also be used to identify malfunctions.
EAM30356

CONNECTING THE YAMAHA DIAGNOSTIC TOOL

1
5
1
5
1. Speed sensor
2. ECU (Engine Control Unit)
3. Wire harness coupler (to the ECU)
4. Wire harness coupler (to the multi-function
display)
5. Multi-function display
TIP
When connected to Yamaha diagnostic tool, the vehicle speed signal line between the meter and ECU
is disconnected and "Er_1" is always shown on the meter display.
FUEL INJECTION SYSTEM
Yamaha diagnostic tool USB (US)
90890-03269
Yamaha diagnostic tool (A/I)
90890-03264
OBD/ GST Leadwire kit
90890-03249
2
3
4
2 3 6
4
6. FI diagnostic tool sub-lead
7. Yamaha diagnostic tool
A. Normal
B. Connected to Yamaha diagnostic tool
8-31
7