Yamaha RX10RTL, Supplemental Service Manual

Page: 156 / 355

FI
Fault code No. 16 Symptom Stuck throttle position sensor detected.
Used diagnostic code No. 01 (throttle position sensor)
Order Inspection operation item and probable
cause
Operation item and countermeasure Reinstatement
method
1 When detecting fault code No.15. Refer to “Fault code No.15”. Reinstated by
starting the
engine,
operating it at
idle, and then
racing it.
2 Installed condition of throttle position
sensor. Check the installed area for looseness or pinching.
Check that it is installed in the specified position.
Refer to “THROTTLE BODIES” section.
3 Defective throttle position sensor Execute the diagnostic mode (Code No.01).
Replace if defective.
Refer to “THROTTLE BODIES” section.
Fault code No. 20 Symptom
Defective values are detected due to the internal malfunction of the intake air
pressure sensor or the atmospheric pressure sensor.
Used diagnostic code No. 02 (atmospheric pressure sensor)
→
1
03 (intake air pressure sensor)
→
2
Order Inspection operation item and probable
cause
Operation item and countermeasure Reinstatement
method
1 Defective atmospheric pressure sensor Execute the diagnostic mode (Code No.02).
Replace if defective.
Refer to “Fault code No.23”. Reinstated by
turning the main
switch ON.
2 Defective intake air pressure sensor Execute the diagnostic mode (Code No.03).
Replace if defective.
Refer to “Fault code No.13”.
Fault code No. 21 Symptom Open or short circuit is detected from the coolant temperature sensor.
Used diagnostic code No. 06 (coolant temperature sensor)
Order Inspection operation item and probable
cause
Operation item and countermeasure Reinstatement
method
1 Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the
coupler.
If there is a malfunction, repair it and connect it
securely.
Coolant temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
Reinstated by
turning the main
switch ON.
2 Open or short circuit in wiring harness
and/or sub lead. Repair or replace if there is an open or short circuit.
Between sensor coupler and ECU coupler
Black/Blue – Black/Blue
Green/White – Green/White
3 Defective coolant temperature sensor. Execute the diagnostic mode (Code No.06).
Replace if defective.
Refer to “COOLING SYSTEM” in CHAPTER 8.
FUEL INJECTION SYSTEM
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