Yamaha MBK X-MAX 300 2017, Service Manual

Page: 377 / 462

FUEL INJECTION SYSTEM
8-72
Fault code No. P2158
Fault code No. P2158
Item
Rear wheel sensor: no normal signals are received from the rear
wheel sensor.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. –
Tool display –
Procedure –
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Locate the malfunction. If the ABS warning light is on,
refer to “BASIC INSTRUC-
TIONS FOR TROUBLESHOOT-
ING” on page 8-85.
If the ABS warning light is off,
perform the following procedure.
Use the monitoring function of
the Yamaha diagnostic tool to
check the rear wheel speed
pulse. For information about us-
ing the Yamaha diagnostic tool,
refer to the operation manual
that is included with the tool.
Rotate the rear wheel by hand
and check the display value for
the rear wheel speed pulse. Dis-
play value for the rear wheel
speed pulse is greater than 0
(km/h)
→
Go to item 9 and de-
lete the fault code.
Display value for the rear wheel
speed pulse is 0 (km/h)
→
Go to
item 2.
2 Connection of rear wheel sen-
sor coupler. Check the locking
condition of the coupler. Discon-
nect the coupler and check the
pins (bent or broken terminals
and locking condition of the
pins).
Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Rotate the rear wheel by hand
and check the display value for
the rear wheel speed pulse us-
ing the monitoring function.
Display value for the rear wheel
speed pulse is greater than 0
(km/h)
→
Go to item 9 and de-
lete the fault code.
Display value for the rear wheel
speed pulse is 0 (km/h)
→
Go to
item 3.
3 Connection of ABS ECU cou-
pler. Check the locking condition
of the coupler. Disconnect the
coupler and check the pins
(bent or broken terminals and
locking condition of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Rotate the rear wheel by hand
and check the display value for
the rear wheel speed pulse us-
ing the monitoring function.
Display value for the rear wheel
speed pulse is greater than 0
(km/h)
→
Go to item 9 and de-
lete the fault code.
Display value for the rear wheel
speed pulse is 0 (km/h)
→
Go to
item 4.