Test Point 4 - Reference Mark Transmitter

TEST POINT 4

Reference Mark Transmitter

Adjust oscilloscope as described in point 3.
(If using SUN 1080, press one of "ignition coil test" buttons for a better picture.)

Connect blue connection via locally made wire on term. 25 and black connection on term. 26 of DME plug.

If using Bosch tester, connect red clip of special lead on term. 25.

Start Engine

A single sine oscillation should be displayed on the screen. It is important that the oscillation begins with a positive slope and more than 2 V is displayed on the screen scale with a starter speed of at least 200 rpm (the signal amplitude depends on the starter speed).




If the transmitter signal is less than 2 V, check distance between transmitter and reference mark

Specification: 0.8 ± 0.05 mm.

If there is no transmitter signal, proceed as described in test point 3 for speed transmitter. The same specifications are applicable.