Yamaha 2010 XMAX YP125R Service Manual page 435

Fault code No.
Item
3 Connections
• Intake air pressure sensor coupler
• Wire harness ECU coupler
4 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 Installed condition of throttle position
sensor.
2 Connections
• Throttle position sensor coupler
• Wire harness ECU coupler
3 Open or short circuit in wire harness.
4 Defective throttle position sensor.
Reinstatement method
14
Intake air pressure sensor: hose line malfunction (clogged or
detached hose).
• 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.
• Execute the diagnostic mode. (Code No. 03)
• Replace if defective.
Refer to "CHECKING THE INTAKE AIR
PRESSURE SENSOR" on page 8-88.
Starting the engine and operating it at idle.
15
Throttle position sensor: open or short circuit detected.
Able to start engine
Able to drive vehicle
01
Throttle angle
• 9–22 (fully closed position)
• 93–106 (fully opened position)
• Check with throttle fully closed.
• Check with throttle fully opened.
• Check for looseness or pinching.
• Check that the sensor is installed in the speci-
fied position.
• 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 throttle position sensor coupler and
ECU coupler.
(gray/red–gray/red)
(yellow–yellow)
(gray/black–gray/black)
• Execute the diagnostic mode. (Code No. 01)
• Replace if defective.
Refer to "CHECKING THE THROTTLE POSI-
TION SENSOR" on page 8-88.
Turning the main switch to "ON".
8-38
FUEL INJECTION SYSTEM
Check or maintenance job