Yamaha FJR13AG Service Manual page 597

Fault code No. P2122, P2123, P2127, P2128, P2138
TIP
If a fault code number ("P2122", "P2123", "P2127", or "P2128") other than "P2138" is indicated, take the
actions specified for that fault code number 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
1 Connection of accelerator posi-
tion sensor 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 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).
3 Wire harness continuity.
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 de-
tected.
[P2138] Deviation error
Able/Unable to start engine
Able/Unable to drive vehicle
14, 15
Accelerator position sensor signal 1
• 12–22 (fully closed position)
• 97–107 (fully open position)
• Check with throttle valves fully closed.
• Check with throttle valves fully open.
Accelerator position sensor signal 2
• 10–24 (fully closed position)
• 95–109 (fully open position)
• Check with throttle valves fully closed.
• Check with throttle valves fully open.
Maintenance job
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
8-120
FUEL INJECTION SYSTEM
Confirmation of service com-
pletion
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" → Go
to item 8 and finish the service.
Condition is "Detected" → Go to
item 2.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" → Go
to item 8 and finish the service.
Condition is "Detected" → Go to
item 3.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recovered" →Go
to item 8 and finish the service.
Condition is "Detected" → Go to
item 4.