Yamaha XT660R S Service Manual

7 - 12
FI
FUEL INJECTION SYSTEM
EAS00908
TROUBLESHOOTING DETAILS
This section describes the countermeasures per fault code number displayed on the meter. Check
and service the items or components that are the probable cause of the malfunction following the
order in the “TROUBLESHOOTING CHART”.
After the checking and servicing the malfunctioning part, reset the meter display. Refer to “Restore
method”.
Fault code No.:
Fault code number displayed on the meter when the engine failed to work normally. Refer to
“Diagnostic monitoring code table”.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to “DIAGNOS-
TIC MODE”.
Fault code No. 12 Symptom No normal signals are received from the crankshaft position sensor.
Used diagnostic code No. – –
Order Item/components Check or maintenance job Restore method
1 Crankshaft position sensor installa-
tion
Check the sensor for looseness or pinching. Reinstated by crank-
ing the engine.
2 Coupler connections
Crankshaft position sensor cou-
pler
ECU coupler
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
If necessary, repair the coupler or securely con-
nect it.
3 Open or short circuit in the wire har-
ness
Repair or replace if there is an open or short cir-
cuit between the wire harnesses.
Gray - Gray
Green/White - Black/Blue
4 Defective crankshaft position sen-
sor
Replace the sensor if it is defective.
Refer to “IGNITION SYSTEM” in chapter 8.

Yamaha XT660R S Specifications

General

Displacement	660 cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission System	5-speed
Final Drive	Chain
Front Suspension System	Telescopic forks
Front Tyre	90/90-21 M/C 54S
Rear Tyre	130/80-17 M/C 65S
Overall Width	865 mm
Overall Height	1, 230 mm
Seat Height	865 mm
Wheelbase	1, 505 mm
Wet Weight	181 kg
Fuel Tank Capacity	15 litres
Oil Tank Capacity	2.9 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC
Maximum Power	48hp (35kW) @ 6, 000rpm
Frame	Steel diamond
Rear Suspension System	Swingarm, (link suspension)
Front Brake	Single 298mm disc, 2-piston caliper
Rear Brake	Single Disc, 245 mm