Haltech F10 Manual do Utilizador descarregar pdf (Página 81)

16.5 Torque Converter Clutch Lockup (TCC)

This function controls the clutch lockup solenoid on automatic transmissions. Locking the

torque converter reduces the amount of energy lost through the transmission, providing better

fuel economy.

The solenoid activates whenever the road sp eed is greater than a p rogrammed value for a

given throttle position. The solenoid will only activate if the engine temp erature is high er 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.

To use the TCC function, you must have the following:

A square wave signal road speed indicator whose frequency is proportional to road

speed; (this may require a unit for signal conditioning, such as the Haltech

RA7)

Access to the wiring of the torque converter lockup solenoid and 4th gear/overtemp

switch;

F10 programming software and cab le.

Wire the TCC solenoid to the appropriate output line on the output connector, and, if it is

available, the 4th gear /overtemp signal to the Aux. In line (the blue fly wire on the F10 main

harness.) The 4th gear/overtemp signal must be a pull-to-ground style signal. If you are not

using this feature, leave the blue flywire disconnected, but insulate the end to ensure sure that

it will not short to the bodywork.

To determine vehicle sp eed, a square wave signal must be applied to the road sp eed inp ut

connector. This connector possesses ground and 12 volt signals for powering a Hall effect or

optical sensor. A magnetic or reluctor type signal is incompatible, and y ou will need to

convert the output from this style of pickup to a square wave. The Haltech

RA7 Reluctor

Adapter would perform satisfactory conditioning.

Once the wiring is complete, run the F10 software in ONLINE mode and go to the M ain Set-

up p age. The p arameter Road Sp eed Value must be set with the number of p ulses exp ected

per kilometre. If y ou are unsure of the exact valu e for this p arameter, enter an approximate

number and ch eck against the vehicle's sp eedometer. Adjust the Road Speed Value until the

road speed disp layed on the Engine Data Page and the actual vehicle speed agr ee.

Go to the Options page in the software, and select the Torque Converter Lockup function on

the approp riate outp ut. The map for the TCC function indexes the vehicle road sp eed against

the throttle position. When, for any given throttle position, the road speed is greater than that

displayed in the map, the solenoid will be energised. The road sp eed must then fall 8 kp h

(5mph) for the clutch to be disengaged. This 8 kph hysteresis should prevent solenoid

oscillation dur in g cru isin g near the cut-off point. The default map activates the solenoid at 70

kph at smallest throttle opening, and increases the activation threshold to 160kph at 70%

throttle. Although this map may be customised as required, it is advisable to never engage the

lockup below 60 kph (40 mph).

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Haltech F10 Manual do Utilizador Página 81

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