Yamaha R1 Series 2015 Service Manual page 537

Fault code No.
Item
5 Defective cylinder identification
sensor.
6 Malfunction in ECU.
Fault code No. 12
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item Probable cause of
malfunction and check
1 Connection of crankshaft posi-
tion sensor coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
2 Connection of wire harness
ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Wire harness continuity.
11
Cylinder identification sensor: no normal signals are received from
the cylinder identification sensor.
Check the cylinder identification
sensor.
Refer to "CHECKING THE CYL-
INDER IDENTIFICATION SEN-
SOR" on page 8-193.
Replace if defective.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-180.
12
Crankshaft position sensor: no normal signals are received from
the crankshaft position sensor.
Unable to start engine
Unable to drive vehicle
—
—
—
Maintenance job
Improperly connected
nect the coupler securely or
replace the wire harness.
Improperly connected
nect the coupler securely or
replace the wire harness.
Open or short circuit
the wire harness.
Between crankshaft position
sensor coupler and ECU cou-
pler.
gray–gray
Between crankshaft position
sensor coupler and joint con-
nector.
black/blue–black/blue
Between joint connector and
ECU coupler.
black/blue–black/blue
8-56
FUEL INJECTION SYSTEM
Crank the engine.
Fault code number is not dis-
played Service is finished.
Fault code number is displayed
Go to item 6.
Confirmation of service com-
Con- Crank the engine.
Fault code number is not dis-
played Service is finished.
Fault code number is displayed
Go to item 2.
Con- Crank the engine.
Fault code number is not dis-
played Service is finished.
Fault code number is displayed
Go to item 3.
Replace Crank the engine.
Fault code number is not dis-
played Service is finished.
Fault code number is displayed
Go to item 4.
pletion