Yamaha YZF-R1(B) 2012 Service Manual page 483

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B. Gear position sensor system malfunction
Item/components and
probable cause
1
Connection of gear 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 wire harness
ECU coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
3
Continuity of leads between
gear position sensor and
relay unit coupler
4
Gear position sensor mal-
function
Refer to "CHECKING THE
GEAR POSITION SENSOR"
on page 8-147.
FUEL INJECTION SYSTEM
Check or maintenance job
Poor connection → Recon-
nect or repair the coupler.
Poor connection → Recon-
nect or repair the coupler.
Open short circuit → Replace
the wire harness.
Sky blue–Sky blue
Replace the gear position
sensor.
8-86
Sensor inspection proce-
dure
Start the engine, and check
the secure connection of the
coupler.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine, and check
the secure connection of the
coupler.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine, and check
the secure connection of the
coupler.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine, and check
the secure connection of the
coupler.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.

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