Speed/Reference Mark Sensor Check

1. With ignition Off, disconnect multiple pin connector from ECU.
2. Using suitable ohmmeter, measure resistance between terminals 7 and 19 of ECU connector. Resistance should be 600 - 1600 ohms.
3. If resistance is not as specified, measure resistance directly at speed/reference mark sensor plug connector terminals 7 and 19. Resistance should be 600 - 1600 ohms. If resistance is satisfactory, check wiring between sensor and ECU. If resistance is not satisfactory, replace sensor.