Yamaha MTN1000 2016 Service Manual page 523

Fault code No.
Item
4 Defective lean angle sensor.
5 Malfunction in ECU.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P2122, P2123, P2127, P2128, P2138
TIP
If a fault code other than No. "P2138" ("P2122, P2123, P2127, P2128") is detected, perform trouble-
shooting first.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
14
Procedure
Tool display
15
Procedure
Probable cause of malfunc-
Item
tion and check
P1604, P1605
[P1604] Lean angle sensor: ground short circuit detected.
[P1605] Lean angle sensor: open or power short circuit.
Refer to "CHECKING THE
LEAN ANGLE SENSOR" on
page 8-201.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-194.
Confirm that the fault code has
a condition of "Recovered"
using the Yamaha diagnostic
tool, and then delete the fault
code.
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.
Able/Unable to start engine
Able/Unable to drive vehicle
14, 15
Accelerator position sensor signal 1
• 13–21 (fully closed position)
• 97–106 (fully open position)
• Check with throttle grip in fully closed position.
• Check with throttle grip in fully open position.
Accelerator position sensor signal 2
• 10–24 (fully closed position)
• 94–109 (fully open position)
• Check with throttle grip in fully closed position.
• Check with throttle grip in fully open position.
Maintenance job
8-106
FUEL INJECTION SYSTEM
Turn the main switch to "ON",
then to "OFF", and then back to
"ON".
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 6 and finish the service.
Condition is "Detected"  Go to
item 5.
Service is finished.
Confirmation of service com-
pletion