Yamaha TMAX XP530E-A 2017 Service Manual page 502

Fault code No.
Item
6 Malfunction in ECU.
7 Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P2158
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of front wheel sen-
sor 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).
2 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).
P2122, P2123, P2127, P2128, P2138
[P2122] Accelerator position sensor: open or ground short circuit
detected.
[P2123] Accelerator position sensor: power short circuit detected.
[P2127] Accelerator position sensor: ground short circuit detected.
[P2128] Accelerator position sensor: open or power short circuit
detected.
[P2138] Accelerator position sensor: output voltage deviation error.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-230.
Confirm that the fault code has
a condition of "Recovered"
using the Yamaha diagnostic
tool, and then delete the fault
code.
P2158
Front wheel sensor: no normal signals are received from the front
wheel sensor.
Able to start engine
Able to drive vehicle
16
Front wheel speed pulse
0–999
Check that the number increases when the front wheel is rotated. The
number is cumulative and does not reset each time the wheel is stopped.
Maintenance job
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
Improperly connected  Con-
nect the coupler securely or
replace the wire harness.
8-111
FUEL INJECTION SYSTEM
Service is finished.
Confirmation of service com-
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 2.
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 3.
pletion