Dual MAP Toggle Switch

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Dec 1, 2013 | 05:05 PM

Doubleup

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From: Monterey

Dual MAP Toggle Switch

I have my ECU programmed with two separate tunes. Is there a way to hardwire switching between Tuned Maps with a simple toggle switch?

Dec 1, 2013 | 05:26 PM

RazorLab

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From: Mid-Hudson, NY

The cruise control button the steering wheel can switch the maps if set up that way in the tune.

Dec 1, 2013 | 05:41 PM

Doubleup

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From: Monterey

I don't have a cruise control button as this is a track car.

Just trying to figure out the appropriate ECU pinout if possible to make the switch back and forth.

Dec 1, 2013 | 05:45 PM

RazorLab

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From: Mid-Hudson, NY

Ah I didn't look at your username the first time around.

Does this mean you are keeping the car?

Here is the info you need:

https://www.evolutionm.net/forums/ec...raxmod-v1.html

Quote:

Originally Posted by tephra

* TPS map switching

As the name suggests this uses the Accelerator Pedal to swap maps, simply turn the ignition ON (but do NOT start the car) and hold the Accelerator Pedal down to the floor

* Cruise Control map switching

This uses the ON/OFF Cruise Control button to swap maps, simply hold the ON/OFF Cruise Control button to toggle maps. This CAN be done whilst the car is driving, see Load Threshold tuneable knob.

* 5V ADC map switching

You can connect your meth/nos controller to the ECU (using pin 112) it must output 0v on FAILURE, and 5v on SYSTEM OK
Because USDM have EVAP USDM vehicles cannot use this method - please use Resistor ADC instead
When the ECU sees the voltage go ABOVE the threshold it will start the timer to swap to alternate maps.
When the ECU sees the voltage go BELOW the threshold it will INSTANTLY swap to normal maps.

* Resistor ADC map switching

You can connect your meth/nos controller to the ECU (using pin 115) it must use a relay to ground pin 115. It is preferable to use a ~250Ohm resistor between pin115 and ground
When the ECU sees the voltage go ABOVE the threshold it will INSTANTLY swap to normal maps.
When the ECU sees the voltage go BELOW the threshold it will start the timer to swap to alternate maps.

There are 4 tuneable knobs:

Alternate Map Master (0=OFF, 1=5V ADC, 2=CruiseControl, 3=TPS, 4=Resistor ADC) - Well pretty obvious I thought

Alternate Map Load Threshold - The system will ONLY swap maps (except for both ADC's failsafe) when BELOW this threshold

Alternate Map Time to Activate - This is the amount of time required to hold the TPS/CruiseControl button to toggle maps. In the case of the ADC's switching, this is the amount of time before the ECU will switch to the Alternate Maps - switching map to normals maps (ie in a failsafe scenario) is INSTANT

Alternate Map ADC Threshold - This is the voltage threshold

For 5V ADC the voltage must be ABOVE this threshold before it will swap to Alternate Maps
For Resistor ADC the voltage must be BELOW this threshold before it will swap to Alternate Maps

Some notes about the Resistor ADC:

* a 250Ohm resistor to ground will produce about 0.5volts on the ADC - I have chosen 250Ohm since the Fuel Tank Temp resitor is 500-10k Ohm, and 250Ohm shouldn't heat up much
* we are hijacking the fuel tank temp signal, so you will NEED to disconnect this wire, probably easiest at C47 - hopefully someone can do a write up

* You only need to use the Resistor ADC if your car has EVAP

[/INDENT]

Dec 2, 2013 | 09:56 AM

Doubleup

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From: Monterey

Thanks! I guess now I just need to figure out what pin FFTEC used in the tune to trigger with 5v... 112 or 115; or do you think it is either one depending on method? He verbally told me I think however tune days are ofter a blur...