Haltech E6K - Manual (Page 136)

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A variation on this type of pickup uses a magnet moving past the pole piece, instead of
ferrous metal, but generating the same wave form. An example of this type is the MSD flying
magnet crank trigger. This pickup can be used to trigger the E6K ECU.
For the E6K to detect the home signal from a motronic trigger it uses slightly altered
hardware. If you are using a motronic trigger your Haltech dealer will help you obtain this
hardware.
Note: Since there are a large number of diverse reluctor distributors it may be
necessary to connect an external custom reluctor adapter unit if the on board
circuitry cannot be configured satisfactorily. Please contact your nearest
Haltech dealer if you are experiencing reluctor configuration problems.
E.2.2 Motronic Trigger
The Bosch Motronic sensor system comprises a toothed wheel, generally 60 teeth, with 2
teeth missing and a sensor which counts the passing teeth. The Ford system with 36 teeth and
1 tooth missing is generally similar. Please note that early versions of software such as 6.09
does not support the Ford 36 teeth wheel and version 6.32 (with matching firmware) or a
subsequent version is necessary. The teeth provide the means for generating trigger signals
and the missing teeth are detected and provide a home reference. Most Motronic type sensors
are reluctor (magnetic) type sensors which give out a signal which is similar to a sine wave
and this signal must be conditioned by a reluctor adaptor. The Haltech E6K system has an
in-built reluctor adaptor but please note that this reluctor adaptor is based on
microprocessors and at the date of publication it is necessary to specify that the system
will be interfacing with a Motronic type trigger system to ensure that the chips are
programmed to suit Motronic. The programming in the chips for Motronic systems is
different for that of other systems. We normally discourage opening the case of the ECU
particularly as this can affect warranty but if in doubt that the correct version of reluctor
adaptor chips are installed this can be checked by carefully removing the 4 screws from the
end plate with no connector and sliding the removable lid from the box. You will note 2 chips
marked PIC16C711 and these should be marked with the letter “M”. If not it is probable that
the correct chips are not installed and you should contact your Haltech supplier. At the date of
publication only Motronic type systems of 60 teeth and less are supported but higher teeth
numbers will be supported at a later date.
Please note that some Motronic sensors are of the Hall effect type which give out a
square wave signal and there is therefore no necessity for signal conditioning. These
sensors have to be configured differently to the E6K system (ie treated as a square wave
input, not a reluctor type input) so you will need to establish which type of Motronic
sensor is on your engine. If 2 wires this will almost certainly be a reluctor type (isolated
loop). If 3 wire it could be either a reluctor type (signal, ground and shield grounded to
sensor) or Hall effect type in which case the Motronic trigger should be connected as a Hall
effect type input (see table under 1.3.14 ie connect power, ground and main trigger). If in
doubt as to the type of sensor check with the engine manufacturer. Also please note that if you
elect to use an external reluctor adaptor rather than the internal reluctor adaptor of the E6K
the signal will already be conditioned to square wave and the connection to the E6K should
then be treated in the same manner as a Hall effect sensor.