Yamaha FJR1300A(D) - Page 491

FUEL INJECTION SYSTEM
8-42
1 Connection of crankshaft po-
sition sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.
2 Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
3 Wire harness continuity. Open or short circuit → Re-
place the wire harness.
Between crankshaft position
sensor coupler and ECU
coupler.
gray/white–gray/white
Between crankshaft position
sensor coupler and joint cou-
pler.
black/blue–black/blue
Between joint coupler and
ECU coupler.
black/blue–black/blue
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 4.
4 Installed condition of crank-
shaft position sensor.
Check for looseness or
pinching.
Check the gap between the
crankshaft position sensor
and the pickup rotor.
Improperly installed sensor
→ Reinstall or replace the
sensor.
Refer to “PICKUP ROTOR”
on page 5-36.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 5.
5 Defective crankshaft posi-
tion sensor.
Check the crankshaft posi-
tion sensor.
Refer to “CHECKING THE
CRANKSHAFT POSITION
SENSOR” on page 8-182.
Replace if defective.
Crank the engine.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 6.
6 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-174.
Fault code No. 12
Item
Crankshaft position sensor: no normal signals are received
from the crankshaft position sensor.