Yamaha YZF-R1S Service Manual page 366

Fault code No. 19
Used diagnostic code No. 20 (sidestand switch)
Order Inspection operation item and probable
cause
1 Connected condition of connector
Main wiring harness ECU coupler
(No.15 pin)
<pin location>
2 Open or short circuit in wiring harness
and / or sub lead.
3 The malfunction of the sidestand switch. Replace if defective.
Fault code No. 20
Used diagnostic code No. 02 (atmospheric pressure sensor) ! 1
03 (intake air pressure sensor) ! 2
Order Inspection operation item and probable
cause
1 Defective atmospheric pressure sensor
2 Defective intake air pressure sensor
FUEL INJECTION SYSTEM
Symptom Open circuit in the input line of ECU No.15 terminal is detected.
Operation item and countermeasure
Execute the diagnostic mode (Code No.20).
Check 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 connected it
securely.
Repair or replace if there is an open or short
circuit.
Between sidestand switch coupler and ECU
coupler
Blue / Black – Black
Refer to "CHECKING THE SWITCHES" in
chapter 8.
Symptom Defective values are detected due to the internal malfunction of the intake air
pressure sensor or the atmospheric pressure sensor.
Operation item and countermeasure
Execute the diagnostic mode (Code No.02).
Replace if defective.
Refer to "Fault code No.23".
Execute the diagnostic mode (Code No.03).
Replace if defective.
Refer to "Fault code No.13".
7-22
FI
Reinstatement
method
If the
transmission is
in gear, it is
reinstated by
retracting the
sidestand.
If the
transmission is
in neutral, it is
reinstated by
reconnecting
the wiring.
Reinstatement
method
Reinstated by
turning the
main switch
ON.