Yamaha MBK XMAX 2014 Service Manual page 364

Fault code No.
Item
2 Defective throttle position
sensor.
3 Malfunction in ECU.
TIP
• If fault code numbers "15" and "16" are both indicated, take the actions specified for fault code number
"15" first.
• If fault code numbers "16" and "37" are both indicated, take the actions specified for fault code number
"16" first.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of mal-
Item
function and check
1 Connection of sidestand
switch coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
16
Throttle position sensor: stuck throttle position sensor is de-
tected.
Check throttle position sen-
sor signal.
Execute the diagnostic
mode. (Code No. D01)
When the throttle valve is ful-
ly closed:
A value of 8–22 is indicated.
When throttle valve is fully
open:
A value of 88–102 is indicat-
ed.
An indicated value is out of
the specified range → Re-
place the throttle position
sensor.
Replace the ECU.
19
Sidestand switch: a break or disconnection of the blue/yellow
lead of the ECU is detected.
Unable to start engine
Unable to drive vehicle
D20
Sidestand switch
• "ON" (sidestand retracted)
• "OFF" (sidestand extended)
Extend and retract the sidestand.
Maintenance job
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
8-51
FUEL INJECTION SYSTEM
Turn the main switch to "ON"
and then open and close the
throttle valve.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
Confirmation of service
completion
Turn the main switch to "ON",
and then extend and retract
the sidestand.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.