Yamaha 2009 YZF-R1 (Y) Service Manual page 446

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Item/components and
probable cause
5 Sidestand switch malfunction Diagnostic mode (Code No.
6 ECU malfunction
19
Open or short circuit of ECU input line (Blue/Yellow lead)
Engine startup: Impossible
Riding: Impossible
D:20
Sidestand switch
• ON (stand retracted)
• OFF (stand extended)
Set on/off the sidestand switch. (with the transmission in gear.)
Check or maintenance job
20).
Sidestand retracted: ON indi-
cation
Sidestand extended: OFF
indication
Indication is incorrect. →
Replace the sidestand
switch.
Replace the ECU.
FUEL INJECTION SYSTEM
8-55
Sensor inspection proce-
dure
Place the main switch to the
ON position, and check the
fault code indication when
the sidestand is retracted and
extended.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.