Speed/Reference Mark Sensor
NOTE:
This test can only be made with an oscilloscope. Adjust workshop oscilloscope to supplier's instructions.
- Connect positive test lead to terminal 7 and connect negative test lead to terminal 19 of disconnected EZF control unit plug. Turn engine with starter. Screen should display "sine" oscillation of at least 2.5 V (speed) with an integrated higher amplitude (reference mark).
- Sensor distance cannot be adjusted. If insufficient (2.5 V speed) or no deflection is displayed on screen, check for proper connections. Check wire resistance at connections or replace sensor. See Fig 1 .