Yamaha YZF-R1(B) 2012 Service Manual page 490

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Item/components and
probable cause
1 ECU malfunction
Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
D:14
Checking
method
Meter display
D:15
Checking
method
Item/components and
probable cause
1 Connection of accelerator
position sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
2 Connection of main harness
ECU coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
50
ECU memory malfunction
Engine startup: Under certain conditions
Riding: Under certain conditions
—
—
—
Check or maintenance job
Replace the ECU.
59
Open or short circuit of accelerator position sensor lead
Engine startup: Possible under certain conditions
Riding: Possible under certain conditions
D:14
D:15
Accelerator position sensor signal 1
• 12–22 (fully closed position)
• 97–107 (fully opened position)
• Check with throttle grip fully closed.
• Check with throttle grip fully open.
Accelerator position sensor signal 2
• 10–24 (fully closed position)
• 95–109 (fully opened position)
• Check with throttle grip fully closed.
• Check with throttle grip fully open.
Check or maintenance job
Poor connection → Connect
it securely, or repair/replace
the wire harness.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
FUEL INJECTION SYSTEM
8-93
Sensor inspection proce-
dure
Place the main switch to the
ON position.
Then, check that no fault
code indicated.
Sensor inspection proce-
dure
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.