Yamaha YZF-R1S Service Manual - page 360
7-16
Crankshaft position sensor
resistance
336
X 504 Ω at 20_C (68_F)
(between gray and black)
Tester positive probe
! gray
Tester negative probe
! black
1
2
1
2
FUEL INJECTION SYSTEM
FI
Fault code No.
12
Symptom
No normal signals are received from the crankshaft position sensor.
Used diagnostic code No. – –
Order
Inspection operation item and probable
cause
Operation item and countermeasure
Reinstatement
method
1
Installed condition of sensor
Check the installed area for looseness or
pinching.
Reinstated by
cranking the
2
Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the
coupler.
If there is a malfunction, repair it and connect it
securely.
Crankshaft position sensor coupler
Main wiring harness ECU coupler
engine.
3
Open or short circuit in wiring harness.
Repair or replace if there is an open or short
circuit between the main wiring harnesses.
Between sensor coupler and ECU coupler
Gray – Gray
Black / Blue – Black / Blue
4
Defective crankshaft position sensor.
Replace if defective.
1. Disconnect the crankshaft position sensor cou-
pler from the wire harness.
2. Connect the pocket tester (
Ω 100) to the
crankshaft position sensor coupler as shown.
3. Measure the crankshaft position sensor resis-
tance.
4. Is the crankshaft position sensor OK?