Haltech E6X Manual DOS Version - Manual (Page 121)

E6X Manual
121
E.5 Synchronisation
When the ECU is configured to operate an engine that uses direct fire ignition or sequential
injection, the ECU needs a reference for engine position often referred to as a “synchronising”
signal or a “home” signal.
When the ECU is configured to perform full sequential injection or full direct fire ignition it
requires a home signal that occurs once in the full cycle (720° of crank rotation and 360° of
cam rotation). If the ECU is configured for waste spark direct fire the ECU requires a home
signal that occurs once in the half cycle (360° of crank rotation).
On a distributed engine the ECU does not need to know the engine position, it simply
generates a spark that is mechanically distributed to the correct cylinder. Direct Fire ignition
systems need to know which cylinder to fire next. The same principles of timing and
sequence apply to sequential injection. When the ECU sees a home signal it assumes that the
cycle for ignition and injection has restarted.
E.6 Trigger Type
The ECU is capable of triggering from various trigger formats as used on a number of
production vehicles other than standard trigger. The trigger types are as follows:
Multi-tooth
Motronic
Twin
Trigger
Nissan
Subaru A (1989 – 2000)
Subaru B (2001 – )
Mazda A
Daihatsu
MGF
The ECU uses these triggers to internally produce a “standard trigger” pattern to make timing
calculations for ignition and injection. The ECU uses the extra information associated with
some of these triggers to allow the user to set the trigger angle to suit the operation of the
haltech regardless of factory trigger positioning.
E.6.1 Multi-tooth
The multi-tooth trigger type supports any trigger system that has multiple evenly spaced
trigger events connected to the trigger channel and one home event connected the home
channel. An example of this type of trigger is the Toyota 24 and 1 cam sensor.