Haltech E6X Manual DOS Version - Manual (Page 123)

E6X Manual
123
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
E.6.3 Twin Triggers
The Twin Trigger is designed for two purposes. It can be used to provide direct fire ignition
on 2 cylinder engines (most motorbike twins) without the use of a Home sensor. The ECU
Main Trigger input fires coil 1, and the Home input is used to fire coil 2. The Twin Trigger
can also be used to differentiate between coils on an 8 or 12 cylinder using twin distributors.
Two four (or six) cylinder distributors, complete with trigger wheels can be used. No home is
required in this configuration.
E.6.4 Nissan Triggers
The Nissan optical trigger sensor is used by almost every ECU controlled Nissan engine. It is
a cam sensor and consequently spins at half the engine speed, and is therefore able to measure
the full engine cycle position, so can be used as a trigger for direct fire and sequential
injection applications. The sensor consists of two signals which will from now on be referred
to as home and trigger.
The home signal consists of 360 evenly spaced pulses, where each falling edge represents 2
degrees of engine movement.