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FI
FUEL INJECTION SYSTEM
Fault code No. 12 Symptom No normal signals are received from the crankshaft position sensor.
Used diagnostic code No.--
Inspection operation item and probable cause Operation item and countermeasure Reinstatement
method
Installed condition of sensor Check the installed area for looseness or
pinching.
Reinstated by
cranking the
engine.
Defective crankshaft position sensor. Replace if defective.
1. Disconnect the crankshaft position sensor
coupler 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
resistance.
4. Is the crankshaft position sensor OK?
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
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
Tester positive probe
→
gray
1
Tester negative probe
→
black
2
1
2
Crankshaft position sensor
resistance
248 ~ 372
Ω
at 20 °C (68 °F)
(between gray and black)