Haltech E6X Manual Win Version - Manual (Page 150)

E6X Manual
150
The Motronic magnetic sensor has two wires, one positive (+), and the other negative (-). The
wires are sometimes marked as such, but more often they are not. It is very important that the
positive wire connects to the Ground (Pin D on the Trigger Input plug on a fully terminated
harness). The negative wire connects to Trigger input (Pin B on the Trigger Input plug on a
fully terminated harness). If you cannot determine which wire is positive or negative from the
marking or wire colour, then it would be necessary to check the signal going into the E6X
using an oscilloscope.
A Motronic wheel more than often has 60 teeth of which two teeth are missing which will
often give a larger signal. The input signal to the E6X trigger circuit must first go negative(-),
then rise to positive as shown in the scope trace below. If the signal goes positive first, then
you must reverse the sensor wirring going to the E6X. The Missing teeth in the Motronic
wheel provide a larger pulse in the output waveform, which is recognised by the Haltech ECU
as the home position.
Scope trace of a Motronic Sensor output.
(Note the missing tooth pulse generates a negative pulse before it goes positive).
If the wires are reversed and the signal goes positive (+) first then the on-board reluctor
adaptor will still generate a pulse but it will not trigger the Haltech correctly resulting in
incorrect ignition timing. So please make sure it is wired correctly.
Note that when using Motronic type sensors it is only necessary to use the Home channel (ie
a separate Home signal to that provided by the missing teeth in the Motronic system) when
using the Sequential mode of operation or when controlling direct fire ignition where 4 coils
are used (including 4 cylinder configurations where one ignition coil per cylinder is used but
excluding 4 cylinder direct fire waste spark where 2 ignition coils are used) and 3 and 5
cylinder applications. The Home channel is independent of the Trigger channel and can use
either reluctor type sensors or Hall effect type sensors.
Negative to
positive
waveform