Haltech E6X Manual Win Version - Manual (Page 149)

E6X Manual
149
E.6.2 Motronic Style Triggers
Motronic style triggers are a type of multi-tooth trigger but are distinct in that they use a
missing tooth instead of a separate home signal to synchronise the ECU with engine position.
The motronic wheels supported by the ECU to date are those driven by the crank only and are
limited to wheels with 60 teeth with 2 missing and 36 teeth with 1 missing. The motronic
wheel operates identically to any other multi-tooth wheel with the following exceptions:
Care must be taken when selecting a “Tooth Offset”, if the tooth offset is selected such that it
will cause the missing tooth to be required to perform a trigger, incorrect trigger timing and
poor engine operation will result.
Note:
Since the missing tooth only gives the crank position (360° crank) and not the
cam position (720° crank and 360° cam) this type of trigger cannot support full
sequential fuel injection or full direct fire ignition unless a cam sensor is used
in conjunction with the motronic wheel.
Due to the high frequency of the motronic signal and complexity of detecting the missing
tooth, the maximum rpm to which the ECU will operate is 9000 rpm.
Ford 36-1 motronic style wheel
Please note that some Motronic sensors are of the Hall effect type, which gives out a
square wave signal, and there is therefore no necessity for signal conditioning. These
sensors have to be configured differently to the E6X 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 1.3.15 ie connect power, ground and main trigger). If in
doubt as to the type of sensor, check with the engine manufacturer.
Missing
Teeth