Yamaha 2010 XMAX YP125R Service Manual page 434

Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Probable cause of malfunction
1 Connections
• Intake air pressure sensor coupler
• Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective intake air pressure sensor.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Probable cause of malfunction
1 Intake air pressure sensor hose
2 Intake air pressure sensor malfunction at
intermediate electrical potential.
13
Intake air pressure sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
03
Displays the intake air pressure.
Operate the throttle while pulling the brake lever and pushing the
start switch " ". (If the display value changes, the performance is
OK.)
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
the coupler securely.
• Repair or replace if there is an open or short
circuit.
• Between intake air pressure sensor coupler
and ECU coupler.
(gray/red–gray/red)
(pink/white–pink/white)
(gray/black–gray/black)
• Execute the diagnostic mode. (Code No. 03)
• Replace if defective.
Refer to "CHECKING THE INTAKE AIR
PRESSURE SENSOR" on page 8-88.
Turning the main switch to "ON".
14
Intake air pressure sensor: hose line malfunction (clogged or
detached hose).
Able to start engine
Able to drive vehicle
03
Displays the intake air pressure.
Operate the throttle while pulling the brake lever and pushing the
start switch " ". (If the display value changes, the performance is
OK.)
• Check the intake air pressure sensor hose
condition.
• Repair or replace the sensor hose.
• Check and repair the connection.
• Replace it if there is a malfunction.
8-37
FUEL INJECTION SYSTEM
Check or maintenance job
Check or maintenance job