Yamaha SR400 2014 Service Manual page 288

Fault code No.
Item
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Installed condition of throttle position
sensor.
2 Defective throttle position sensor.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Procedure
Probable cause of malfunction
1 Connections
• Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective sidestand switch.
Reinstatement method
16
Throttle position sensor: stuck throttle position sensor
detected.
Throttle angle
• 14–20 (fully closed position)
• 79–85 (fully open position)
• Check with throttle fully closed.
• Check with throttle fully open.
• Check for looseness or pinching.
• Check that the sensor is installed in the spec-
• Execute diagnostic code No. D01.
• Replace if defective.
Start the engine, let it run at idle, and then race it.
19
Sidestand switch: a break or disconnection of blue/black lead
of the ECU is detected.
Unable to start engine
Unable to drive vehicle
D20
Sidestand switch
• on (sidestand retracted)
• off (sidestand extended)
Extend and retract the sidestand (with the transmission in gear).
• Check the coupler for any pins that may be
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
• Repair or replace if there is an open or short
• Between the ECU and blue/black lead
• Execute diagnostic code No. D20.
• Replace if defective.
If the transmission in gear, retract the sidestand.
If the transmission is in neutral, connect the wiring.
7-31
FUEL INJECTION SYSTEM
Check or maintenance job
ified position.
Refer to "CHECKING THE THROTTLE
POSITION SENSOR" on page 7-70.
Check or maintenance job
pulled out.
the coupler securely.
circuit.
Refer to "CHECKING THE SWITCHES" on
page 7-55.