Haltech IG5 - Manual (Page 52)

48
CHAPTER 13 AUXILIARY OUTPUTS
13.1 Description
The IG5 possesses a maximum of 4 auxiliary outputs each of which may be programd to
control a certain function. Each output is a pull-to-ground style signal suitable for switching
solenoids, relays or low-power dashboard lamps. Do not connect any device which requires
more than 200 milli-amp continuous current directly to the ECU - it will not operate properly.
If you are switching high currents, use a suitable relay, either mechanical or solid state, and
control the heavier current with the relay.
A number of function programs exist within the IG5 ECU. You may select any function to be
executed on any auxiliary output, but no two channels may perform the same function.
Following is a list of available functions to choose from. This list will grow with further
development of the IG5 system. You may choose any two functions from this list.
Turbo Waste Gate Control
Dual Intake Valve Control
Torque Converter Clutch Lockup
Electric Thermatic Fan Control
Electric Intercooler Fan Control
Shift Light Indicator
Stall Saving Solenoid Control
Turbo Timer
NOS Switch
Note: In some more complex applications, one two or even three of the
Auxiliary Outputs may not be available.
Torque Converter Clutch Control cannot be used if a Home Trigger is being used.
Torque Converter Clutch Control, Turbo Timer and Nos can not be used together as
they use the same hardware. Choose only one of these. The Aux. In Functions in the
Identification must be set for the correct function when using any one of these 3 functions.
13.2 Turbo Waste Gate Control (TWG)
13.2.1 Description
The wastegate of a turbo is operated when the manifold pressure is sufficiently high to force
the diaphragm within the wastegate unit. With electronic boost control a pulsating solenoid
bleeds off the manifold pressure at the waste gate unit so reducing the manifold pressure. The
solenoid operates at constant frequency and the duty cycle is altered to control the drop in
pressure.