Yamaha FJR13AG Service Manual page 602

Fault code No.
Item
5 Accelerator position sensor re-
sistance.
6 Defective accelerator position
sensor.
7 Malfunction in ECU.
8 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.
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
Measure the accelerator posi-
tion sensor resistance.
black/blue–blue
Refer to "CHECKING THE AC-
CELERATOR POSITION SEN-
SOR" on page 8-263.
Check accelerator position sen-
sor signal 1.
Execute the diagnostic mode.
(Code No. 14)
When the throttle valves are ful-
ly closed:
A value of 12–22 is indicated.
When throttle valves are fully
open:
A value of 97–107 is indicated.
Check accelerator position sen-
sor signal 2.
Execute the diagnostic mode.
(Code No. 15)
When the throttle valves are ful-
ly closed:
A value of 10–24 is indicated.
When the throttle valves are ful-
ly open:
A value of 95–109 is indicated.
An indicated value is out of the
specified range → Replace the
accelerator position sensor.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-250.
Confirm that the fault code has
a condition of "Recovered" us-
ing 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
8-125
FUEL INJECTION SYSTEM
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 6.
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 7.
Service is finished.