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VF bimodal pin diagram

snistr

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Hi all, hoping someone can help. Looking for a pin diagram for the VF electronic bimodal unit. There are 4 pins and would like to know which is ground, power etc. the exhaust is not on the car so I can't put a multimeter to test. Any help would be great.

I got my hands on a VF clubsport exhaust and would like to fit and if possible connect the bimodal via a switch.
 

Nfsve

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Power, gnd, PWM in, .... not in that order though.
 
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snistr

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wow didn't really expect it to be so complicated.

I do have the plug for one of the mufflers and there is only three wires coming out.

But looks like its harder than just connecting12v to the bimodal unit via a switch.
 

TazzI

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Right, thats both a very (extremely) smart implementation.. and also a very silly one.

The design has zero 'smarts' behind. That entire problem can be eliminated by using a microcontroller instead. And a simple on/off switch.

Can be designed with a transistor, or solid state relay to pulse the 12v signal to the unit at the required frequency. I skipped a little bit of the more technical details, but assuming we need a nice square wave then the coding is extremely simple..
Even a none equal on/off square signal is just as easy to implement.

Small handful of coding required...

while (true){

if (digitalRead(BimodalSwitch) == HIGH)
{
digitalWrite(HIGH, RelayPin);
delay(FrequencyCalc);
digitalWrite(LOW, RelayPin);
delay(FrequencyCalc);
}
}
 

Nfsve

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Do you have a picture of the plug?
 
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Nfsve

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Pin 1 gnd, pin 4 12v, pin 3 PWM in
 

snistr

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Ill try to load a pic tonight
 

Mavericks Choice

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I have a my16 SSV M6 Ute with bi modal what gets me is the crackle/fart on decel/gearchange especially when cold. It appears to me that the butterflys when in the closed position flap about under exhaust! I have no idea why they don't incorporate some type of return spring to hold there position when not actuated?
 
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