If you use a 555 timer to switch the TPS line to the TCU, between 0V to 5V, it will also cause the line pressure to switch between full and low pressure, through the Dropping resistor circuit.

Harvey.;)

Thanks Harvey.

Do you know if the line pressure is able to respond to such an input? I mean one of 250ms or less?

Joe

As always a definitive statement.

The dropping resistor circuit is in no way involved with any operative control signal. Your lack of understanding in this respect is already well recorded.

In what way will the line pressure be induced to change as a result of very short pulses? This type of signal already exists in respect power mode activation as well as kick down as has been demonstrated through experiments.

Don't know Joe, but I am sure it will try.:)

Harvey.;)

Harvey, you keep expounding a theory whereby you contend that the TPS in itself originates a control signal, and this is incorrect.

All signals from the TPS comprise an input to the TCU and it is only after processing that any output results. Line pressure control is dependent on several functions, not simply the input from the TPS.

It is documented fact that the TCU receives two separate types of signal from the TPS, one on the basis of speed of accelerator depression and the other the position of the accelerator. Experimentation now indicates that there could be a third based on a short application of the accelerator i.e. there is probably a time base in respect of first documented signal.

All of this is logically covered within the thread, but evidently has gone over your head.