Yamaha MBK XMAX 2014, Service Manual

Page: 375 / 482

FUEL INJECTION SYSTEM
8-62
Fault code No. 41
Item Lean angle sensor: open or short circuit detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. D08
FI diagnostic tool display
Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Procedure
Remove the lean angle sensor and incline it more than 65 de-
grees.
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Connection of lean angle
sensor 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). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”,
then to “OFF”, and then back
to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 2.
2 Connection of wire harness
ECU 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). Improperly connected
→
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”,
then to “OFF”, and then back
to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 3.
3 Wire harness continuity. Open or short circuit
→
Re-
place the wire harness.
Between lean angle sensor
coupler and ECU coupler.
yellow/green–yellow/green
blue–blue
black/blue–black/blue
Turn the main switch to “ON”,
then to “OFF”, and then back
to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 4.
4 Defective lean angle sensor. Execute the diagnostic
mode. (Code No. D08)
Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 8-144. Turn the main switch to “ON”,
then to “OFF”, and then back
to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 5.
5 Malfunction in ECU. Replace the ECU.
Fault code No. 42 (For YP125R)
Item
Speed sensor: no normal signals are received from the speed
sensor.
Fail-safe system
Able to start engine
Able to drive vehicle