Haltech E6K - Manual (Page 138)

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Note: The polarity conflicts with Appendix E.2 as regards connection of a
reluctor adaptor. Due to hardware constraints of the E6K 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 E6K 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 E6K 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 E6K 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.
If using a reluctor type sensor go to the “Ignition” set-up page and set the “Trigger Mode” to
“Constant”.