Yamaha Vmax VMX17C 2009 Service Manual page 479

Fault code No.
Item
Meter display
D:13
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
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Actuator operation
Checking method
Probable cause of malfunction
1 Connections
• EXUP servo motor coupler
• Wire harness ECU coupler
15
Throttle position sensor: open or short circuit detected.
Throttle position sensor signal 2
• 15–16 (fully closed position)
• 97–102 (fully opened position)
• Check with throttle valve fully closed.
• Check with throttle valve 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.
(black/brown–black/brown)
(white–white)
(black–black)
(blue/green–blue/green)
• Execute the diagnostic mode. (Code No. D:01
and/or D:13)
• Replace if defective.
Refer to "CHECKING THE THROTTLE POSI-
TION SENSOR" on page 8-137.
Turning the main switch to "ON".
17
EXUP servo motor circuit: open or short circuit detected.
Able to start engine
Able to drive vehicle
D:53
Actuates the EXUP servo motor (turns to open side and to closed
side).
Illuminates the engine trouble warning light.
Check the operating sound.
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the couplers.
• If there is a malfunction, repair it and connect
the coupler securely.
8-46
FUEL INJECTION SYSTEM
Check or maintenance job
Check or maintenance job