Yamaha Vmax VMX17C 2009 Service Manual page 497

Fault code No.
Item
4 Defective accelerator position sensor.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
D:01
Checking method
Meter display
D:13
Checking method
Probable cause of malfunction
1 Installed condition of throttle position
sensor.
2 Connections
• Throttle servo motor coupler
• Wire harness ECU coupler
3 Open or short circuit in wire harness.
4 Defective throttle servo motor.
5 Malfunction in ECU.
59
Accelerator position sensor: open or short circuit detected.
• Execute the diagnostic mode. (Code No. D:14
and/or D:15)
• Replace if defective.
Refer to "CHECKING THE ACCELERATOR
POSITION SENSOR" on page 8-138.
Turning the main switch to "ON".
60
Throttle servo motor: open or short circuit detected.
Defective throttle servo motor.
Malfunction in ECU (servo motor driving system).
Able/Unable to start engine
Able/Unable to drive vehicle
D:01, D:13
Throttle position sensor signal 1
• 15–16 (fully closed position)
• 97–102 (fully opened position)
• Check with throttle valve fully closed.
• Check with throttle valve fully open.
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 open.
• 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 servo motor coupler and ECU
coupler.
(yellow/red–yellow/red)
(yellow/white–yellow/white)
• Execute the diagnostic mode. (Code No. D:01
and/or D:13)
• Replace the throttle body assembly if defec-
tive.
• Replace the ECU.
8-64
FUEL INJECTION SYSTEM
Check or maintenance job