Haltech E8 - Manual (Page 65)

Haltech E11/E8 Instruction Manual
Figure 70 - Thermofan Output
• Coolant Temp High - Thermo fan turns on at this temperature
• Coolant Temp Low - Thermo fan turns off at this temperature. Must be set lower than the Coolant
Temp High parameter.
• Auto Activate with A/C – When an input is correctly configured as A/C Request the thermofan
can also be automatically be activated and deactivaed when the Air Conditioning is switched on
and off.
Thermofan (duty)
The thermo fan (duty) output function is used on certain thermal cooling fans that have intelligent control
logic built into their control relays. Thermofans such these will vary their fan speed based on engine
temperature, generally as the engine temperature increases so does the fan speed. This type of thermo
fan control is often controlled by intelligent relay circuitry. The control output from the ECU varies output
duty cycle with temperature, this in turn varies the speed of the fan. This form of fan control is found in
some late model vehicles including some Mitsibishi Lancer EVOs.
Figure 71 - Thermofan (duty) Output
Torque Converter Lockup Control (TCC)
This function controls the clutch lockup solenoid on automatic transmissions that support this feature.
Locking the torque converter reduces the amount of energy lost through the transmission, providing better
fuel economy.
The solenoid activates whenever the road speed is greater than a programmed value for a given throttle
position. With the default settings, the solenoid will only activate if the engine temperature is higher than
46°C (118°F), and will be disengaged if the throttle position exceeds 70% or road speed falls below
64kph. The TCC function also provides for a 4th gear/transmission over-temperature switch input. This
signal indicates that the transmission is hot, and engaged in top gear. When this is the case, the lockup
solenoid is activated regardless of road speed whenever the throttle is more than 4% opened.
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