Wiring ‘Sport’ switch to operate exhaust valves

Not 100% sure of the internal wiring of the switch, but I suspect it is something like this:

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You'll only get power on the yellow/red (GR) wire with the sidelights/headlights turned on. Were you expecting it to illuminate when the switch is turned on?

Perhaps you can help me confirm the wiring?

Thanks.

(EDIT: The connector graphic shows the pin numbers as viewed from the side with the metal contacts, not the wire side. Looks like I've messed up the colours in the graphic, but the pin numbers should be correct)

 

Corrected graphic:

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Pin 1: blank
Pin 2: black/violet & red/yellow
Pin 3: Yellow/red
Pin 4: Brown/white
Pin 5: Red/yellow

This is for the F360 by the way.

 

It's a useful exercise to understand the pinout of the digital switches however the way the exhaust valves are controlled isn't how you'd expect.

The engine ECUs themselves manage the valves opening and closing so there is no direct signal from any button.

The sports button for example is wired directly to a spare gpio pin (general purpose input/output) on the Magneti Marelli dashboard. This then allows it to activate the dash lights to show your in sports mode or not. The signal on which mode your in is required by several systems including suspension, automated transmission control (TCU) and engine management ignition ECUs. Instead of wiring additional pins between all these ecus and potentially more the engineers decided to broadcast the sport mode signal over a CAN bus message. Then anyone interested ECUs can read the message and interrogate the state (on or off).

The later spec post 2003 engine ECUs programming depending on the model year (early cars didn't do this, they only had to make do with a single map) had multiple maps for exhaust valve regulation. The work on % torque requested (from your throttle pedal) and also the engine rpm your currently at. With the signal from your sports button it will switch to a sports exhaust valve map or the standard map. Both operate the valves at different opening points.

I have developed tools to allow these maps to be personalized alongside the programming to tailor many other aspects of your driving experience including throttle sensitivity, improved performance and many other functions. In this way for example you can retrofit existing sports button to open valves all the time or only after say 1% throttle .. which is basically the same except they close at idle with no driver inputs which is a better version of a basic exhaust valve controller. If you need more information let me know.


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Perhaps Aaron can clarify his intentions. I was assuming he was wiring the SPORT switch in parallel with the normal system.

Strange... The 2003 wiring diagrams I have seem to be missing this connection. I see the SPORT switch hooked up directly with the Suspension ECU. I see an orange/white and a green/yellow wire going to the Instrument panel from the Suspension ECU, but it's not clear of their functions. They go to pins 12 and 17 on the instrument panel 20 pin connector. I assumed one was for the SPORT light. No idea what the other one does. Comparing this with the F430, pin 12 is unused, pin 17 has the odd label "Suspension check to electronic check".

 

I assumed the OP.waa using the switch to control a "exhaust valve controller" like a Forza

This is something a few people have done already .. not interfering with cars wiring ..only that of the third party controller

In this case though OP wants to have backlight work so he will have to patch into dash wiring as Ian laid out

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Here's the other side of the Sport Switch...

1 Not connected
2 Negative switch
3 Positive switch
4 Switch position on "soft" setting (NORMAL)
5 Switch position on "hard" setting (SPORT/RACE)

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No your right..

I'd forgotten, the Suspension ECU actually gets the sport mode switch input, it then relay's the signal to the Instrument cluster which in turn converts it to a CAN message for any ecu's listening on the CAN bus like TCU.

Suspension ECU:
Pin 9 RACE mode switch Digital input (From Sport Button)
Pin 15 RACE mode signal Digital output (To Instrument Cluster)

Instrument Cluster:
Connector C
Pin 12 RACE mode switch Digital input (From Suspension ECU)

 

Thanks, Trev. That hookup suggests that pin 5 is normally connected (internally) to pin 2 (fixed earth) with the switch not selected. Perhaps Aaron can confirm this.

I'm just wondering why they bothered to add an external jumper wire (on the connector).

That will make my switch internals look messier:
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Might be easier to use the unused on US rear fog light switch combined with Steve Bisset's or Fabio's bypass controller. But you would need to get one of the stickie guys to change the gutless blank switch for a two position switch. They are already doing that and putting various exhaust symbols on the face.

 

Did you go thru center tunnel and out driver side fuse box area ?

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And the fog light harness was just hanging behind the dash ? That was a pretty good score

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Which part number did you use

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Forza should offer an option to purchase this hard wire switch plug and play. Nice work.

 

Why using a Forza module if you want to command the valves via a switch ?
A $50 electrovalve and some length of vacuum hoses will do the job

 

Delve into the software domain and you don't even need to fit anything yet you get significantly more fine grain controls. You can apply a "software" valve controller

The exhaust valve maps are fully configurable and significantly more advanced than any aftermarket valve controller as they also take into consideration engine conditions. For instance load (%) and rpm (revs) so they can open exactly how you like. E.g. 1% throttle and 1,500rpm the valves snap open in Sport or Race mode, 50% throttle and 4,000 rpm and then they open in Normal mode, in fact the maps are totally flexible and configurable to exactly how you like. I can even revise the logic so that at your highway cruising speed after given time period (e.g. >10 seconds) in the steady state of driving in any given given gear (not fluctuating by -/+ 1000 rpm) the valves close and stay there until you apply +20% more throttle in less than a given threshold of time (e.g. overtaking). That way you can deploy aggressive race maps and still settle back into a relaxed cruise and intelligently your car can "detect" this using the above conditions and close the valves for you automatically. There are any number of parameters you can use to decide how advanced (or simple) you want this to behave.

For example you can have race mode always open (i.e. 0% throttle at ANY revs and its open, so in other words open in race) and then in normal mode its closed. Then you can just flick the switch and go from open to closed when you want without any aftermarket bolt on's. Entirely in software. No Bolt on's!

I would personally also never keep the exhaust valves closed at approaching max rpm's as on a 360 as this places significantly higher loading on the shafts of the Cam timing variators which is an increased risk of failures. This was a "bug fix / lesson" learned by Bosch when they introduced the F430's, at ANY point at the high RPM's the valves fly open to protect the engine components regardless of if your driving mode.

 

Hi Trev.

Of course it can be done by remapping the S/W but :
- not everybody can do that
- still, I prefer to have a manual control for opening the valves all the time, and to keep the S/W mapping I have as it is (Sport exhaust + CS mapping) for the rest of the day. Even in Race, I don't want to have the valves open continuously.

One cool mod could be to connect a switch to an unused input of the ECU, and to modify the S/W, so that the valves can be opened all the time via the S/W. Best of both worlds ...

 

We can also change the SPORT wording on the switch to whatever you guys want. We have exhaust ones for several customers.
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No need to even re-wire the harness connector anymore. I can program into the software ability to interpret additional CAN messages in either direction now to do whatever I want wit that data including Exhaust Controller. So If you connect a CAN line based switch (just line the Manettino switch) to the CAN bus off the back of the OBD port I can listen for it and then do whatever you want.

Hint: Bypassing the ecu control of the exhaust valves isn't very clever as its torque modelling gets upset so your far better cooperating with it than overriding it.

 

How much are these stickers?


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PM sent

 

Thank you

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