Fault code No.
Item
3
Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
4
Wire harness continuity.
5
Malfunction in ECU.
6
Malfunction in ABS ECU.
7
Delete the fault code and check
that the engine trouble warning
light goes off.
P2158
Front wheel sensor: no normal signals are received from the front
wheel sensor.
Improperly connected Con-
nect the coupler securely or
replace the wire harness.
Open or short circuit Replace
the wire harness.
Between front wheel sensor
coupler and ABS ECU coupler.
black–black
white–white
Between ABS ECU coupler and
ECU coupler.
white/yellow–white/yellow
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-230.
Replace the ABS ECU.
Push the ON/start switch, and
then rotate the front wheel by
hand.
Start the engine, and input the
vehicle speed signals by operat-
ing the vehicle at 20 to 30 km/h
(12 to 19 mph).
Confirm that the fault code has
a condition of "Recovered"
using the malfunction mode of
the Yamaha diagnostic tool, and
then delete the fault code.
Delete this fault code even if it
has a condition of "Detected".
8-112
FUEL INJECTION SYSTEM
Execute the diagnostic mode.
(Code No. 16)
Rotate the front wheel by hand
and check that the indicated
value increases.
Value increases Go to item 7
and finish the service.
Value does not increase Go
to item 4.
Execute the diagnostic mode.
(Code No. 16)
Rotate the front wheel by hand
and check that the indicated
value increases.
Value increases Go to item 7
and finish the service.
Value does not increase Go
to item 5.
Execute the diagnostic mode.
(Code No. 16)
Rotate the front wheel by hand
and check that the indicated
value increases.
Value increases Go to item 7
and finish the service.
Value does not increase Go
to item 6.
Go to item 7.