Haltech IG5 - Manual (Page 57)

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Note: When using the TCC function, the Aux. In Function in the
Identification must be set for Torque Converter Control. When using TCC,
other functions that use the Aux. Input line can not be used.
13.5 Electric Thermatic Fan Control (TF)
This function can be used to switch on a thermofan when the engine temperature exceeds a
certain value. The fan will stay on until the engine temperature drops below a second value.
Note: The electric fan cannot be driven directly by the ECU. A relay must be
used to switch the high currents drawn by the fan.
To use this function, you must have the following:
- an electric thermofan, fused and relay switched;
- IG5 programming software and cable.
Install the wiring for the thermofan to one of the Auxiliary outputs as described in figure 13.5
Be sure that the relay contacts are rated higher than the current drawn by the thermofan.
Run the IG5 programming software and go to the Options page. Select the Thermofan
function on the appropriate output and set the two temperatures as required.
Switch On Temperature
The engine coolant temperature above which the fan switches on.
Switch Off Temperature
The engine coolant temperature above which the fan switches on. This parameter
should be at least 5° lower than the Switch On temperature to prevent the fan from
switching in and out repeatedly.
Figure 13.5. Example circuit for Thermatic Fan Control