Haltech E6M - Manual (Page 143)

137
Note: The polarity conflicts with E.2 Reluctor (Magnetic Coil) Triggers as
regards connection of a reluctor adaptor. Due to hardware constraints of the
E6M the polarity is in fact reversed when connecting a reluctor type Motronic
sensor.
The reversal of polarity is applicable only to the Trigger circuit. The Home
circuit polarity is not reversed.
When the Haltech E6M is triggered by a Motronic reluctor type sensor an external in-
line resistor is needed. This resistor links trigger Input B to a Motronic sensor. This
resistor is 2.4k
Ω
but please note that some installers have found that a higher
resistance to 2.4 K ohm is needed for certain installations. Should you find that the
engine will not rev beyond certain limits we suggest you temporarily install a rotary
potentiometer in line of around 20 K ohm and increase the resistance until you find
that the motor revs out smoothly to maximum rpm. Then measure the resistance and
substitute the rotary pot with a hard set resistance of the same value (1/4 watt min.).
There is a zero ohm link within the E6M ECU which can be substituted for the correct
resistance once known. As the components are surface mount we suggest that the ECU
be returned to Haltech if an internal rather than an external resistor is required. (a 2.4
K ohm resistor cannot be fitted as standard on the E6M as some applications require a
zero ohm link).
As a guide we have found that BMW installations require around 2.4 k
Ω
resistance,
Porsche around 17 k
Ω
, and Opel around 3.5 k
Ω
, however different installations and
different types of Motronic sensors may require a variation to the above. The purpose
of the in-line resistance is to load the pick-up coil to give it a high immunity to radio
frequency (RF) noise. Generally the engine will start and run correctly and the
problem of the in-line resistance will only manifest itself in that the revs will be
limited if the correct resistance is not set, generally by limiting the amount of revs
obtained.
In the main set-up page set the number of cylinders and set the system mode at the
bottom of the page to “Advanced”. Now go to the Ignition set-up page and under
“Trigger Type” select “Motronic”. As soon as you do the “Trigger Edge” option will
disappear as the ECU will set the correct edge.
Please note that the number of teeth entered in the software by means of the
ignition set-up page should be set to reflect the number of teeth that pass the
sensor in one camshaft revolution. For example, for a motronic wheel with 60
teeth less 2 missing teeth this entry should be 120. The number of teeth should be
directly divisible by the number of cylinders. Further note that early versions of
software such as 6.09 do not support motronic type sensors of more than 60 teeth
please contact Haltech as it is the intention to extend the range of support in the future.
Set the “Trigger Input” to “Internal Reluctor” but only if the Motronic sensor is of
the reluctor type. If it is of the Hall effect type set “Trigger Input” to “Hall
Effect”.
Set the “Trigger Gain” to suit. This number can be set between 0-7. A lower number
will make it less sensitive and a higher number will make it more sensitive. Start
around 2 and increase from there.