FUEL INJECTION SYSTEM
8-77
Fault code No. 59
Item Accelerator position sensor: open or short circuit detected.
Fail-safe system
Able/Unable to start engine
Able/Unable to drive vehicle
Diagnostic code No. 14, 15
14
Meter display
Accelerator position sensor signal 1
• 12–22 (fully closed position)
• 97–107 (fully open position)
Procedure
• Check with throttle grip in fully closed position.
• Check with throttle grip in fully open position.
15
Meter display
Accelerator position sensor signal 2
• 10–24 (fully closed position)
• 97–109 (fully open position)
Procedure
• Check with throttle grip in fully closed position.
• Check with throttle grip in fully open position.
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Connection of accelerator
position sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.
2 Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
3 Wire harness continuity. Open or short circuit → Re-
place the wire harness.
Between accelerator position
sensor coupler and ECU
coupler.
black/blue–black/blue
white–white
black–black
blue–blue
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 4.
4 Installed condition of accel-
erator position sensor.
Check for looseness or
pinching.
Improperly installed sensor
→ Reinstall or adjust the
sensor.
Refer to “ADJUSTING THE
ACCELERATOR POSITION
SENSOR” on page 7-11.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 5.
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