Yamaha XP500 Service Manual page 458

Fault code No. 12
Used diagnostic code No. – –
Order Inspection operation item and
probable cause
1 Installed condition of sensor
2 Defective crankshaft position sen-
sor.
3 Open or short circuit in wiring har-
ness.
4 Connected condition of connector
Inspect the coupler for any pins
that may have pulled cut.
Check the locking condition of the
coupler.
FUEL INJECTION SYSTEM
Symptom No normal signals are received from the crankshaft position sensor.
Operation item and countermeasure
Check the installed area for looseness or pinching.
Replace if defective.
1. Disconnect the crankshaft position sensor cou-
pler from the wire harness.
2. Connect the pocket tester (Ω × 100) to the crank-
shaft position sensor coupler as shown.
Positive tester probe → gray 1
Negative tester probe → black 2
3. Measure the crankshaft position sensor resis-
tance.
4. Is the crankshaft position sensor OK?
Repair or replace if there is an open or short circuit
between the main wiring harnesses.
Between sensor coupler and ECU (engine) coupler
black/yellow – black/yellow
black/blue – black/blue
If there is a malfunction, repair it and connect it
securely.
Crankshaft position sensor coupler
Main wiring harness ECU (engine) coupler
Gy B
1
Crankshaft position sensor resis-
tance
189 ~ 231 Ω at 20 °C (68 °F)
(between gray and black)
7 - 13
FI
Reinstatement
method
Reinstated by
cranking the
engine.
2