ECU Controled Active Areo via custom Pin 48 output

[Greg E]

It occurred to me that this wouldn't be very hard to setup.

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The only difference you would wire it so the dash switch will control power to the relays and the ECU will be the trigger for the relays.

Chrome mod Custom Pin 48 output gives the user the ability to activate the pin based off coolant temp, RPM and Load. I could very easily add speed as another input condition. In fact, I can take it one step further where you can enable/disable the inputs you want to trigger the pin, then set the min/max conditions. You can eveon have the ability to enable if you want a min and/or a max condition.

What do you guys think?

This pin could literally be used for anything. Not just AA. OBD1 purge solenoid operation, Meth injection, nitrous... Hell it can turn on a streaming word LED banner that says, "eat my shorts" if you want.

[smartaxel]

Would you be able to give this same option to other pins? Eg the vent solenoid (35) pin? I like being able to enable or disable the triggers. That'd give the most flexibility and be ideal.

[Greg E]

Pin 35 is being switched from a custom output to just an oil pressure based trigger.

There are other switched outputs on the board. Hopefully I will get a chance to find them in the code soon.

[95gto]

Seriously cool as this just made integrating an active aero wing on non-active aero cars easier.

Now I just need to finish my APR to active aero conversion.

[futurevr4man]

i have not rewired mine yet because im curious what you will come up with. my wing doesnt work currently though :(

[Greg E]

i have not rewired mine yet because im curious what you will come up with. my wing doesnt work currently though :(

The contact connectors might be bad on the rear wing. Its an easy fix.

[2fnloud]

I wonder how cool an AA banana would be?

[futurevr4man]

its strange, greg. it will work once, then the aero light comes on the dash and it doesnt work anymore

[Greg E]

its strange, greg. it will work once, then the aero light comes on the dash and it doesnt work anymore

AA ECU is faulty, motors are rusty or the contacts on the wing are bad. 3 most common issues.

[Vishnu]

its strange, greg. it will work once, then the aero light comes on the dash and it doesnt work anymore

I get that right now, but I have no motor plugged into the front dam.

[Jesters Deadd]

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[futurevr4man]

I get that right now, but I have no motor plugged into the front dam.

im assuming you have a 91-93 though correct? i have a 94, so im not sure why it is happening to me.

[CoopKill]

im assuming you have a 91-93 though correct? i have a 94, so im not sure why it is happening to me.

Does your front actually work when it work the one time? If not, when you unplug the motor for the front it acts like that.

[Vishnu]

im assuming you have a 91-93 though correct? i have a 94, so im not sure why it is happening to me.

I have a 95, so our systems should be virtually identical. I could try plugging in my motor and seeing if it corrects the issue, I've just lived without it since I don't have a functional air dam yet, still trying to repair mine.

[CoopKill]

Without the front motor plugged in it will code out after operating once. 3sx has a plug n play module to fix it if you have no motor, or removed the front aero entirely.

[ChargerX3]

Good stuff. Ill have an exhaust dump cutout that i may use this for in the future.

[Vishnu]

Without the front motor plugged in it will code out after operating once. 3sx has a plug n play module to fix it if you have no motor, or removed the front aero entirely.

I'm actually toying around with linear actuators to act as the motor in order to keep AA with a FMIC, this chrome mod might actually help alleviate the Issues I'm stuck on right now.

[Greg E]

Good stuff. Ill have an exhaust dump cutout that i may use this for in the future.

Why not use the current active exhaust chrome mod for that?

[ChargerX3]

Probably will unless i still want to use it for the AE separately. Just depends on if i keep the stock exhaust.

[hated]

Greg,

I assume this can be used for Alcohol injection? Also, you can set it up to disable if you run out? Been reading thru all 7 pages of the forum, and my head is spinning.

[Toni]

Greg,

I can't seem to get the pin 48 output to trigger. I wanted to use it as a shift light output so I set the coolant to 36, min/max rpm 3000/7000, min/max load 1/300. I logged the output and it never went to 1. This was with the ignition on, car running, and car moving. I tried using 100/7000 also just to make it always trigger. No luck. I verified my pin out from my test wire to the ecu pin. It's correct with no break and I did not get any ground trigger. Also tested to see if I would get +12 on it with no luck.

edit: I also have bit 10 enabled for pin 48 output.

Any ideas?

I don't have a vent wire on my harness so for now I'm gonna try the active exhaust output.

[Greg E]

We tested every portion of this setup using LEDs so I know it works. That's not to say something got missed.

Pin 48 is the FPR solenoid not the Vent. Make sure you're checking the correct output.

[Toni]

I figured it was something I was doing. I'll double check all the pinouts as well. Also, I'll try to configure pin 35 for the same to see if anything changes and I did get it mixed up. I'm pretty sure I wanted to use pin 35 to start but my older 1g adapter harness wasn't populated for the vent wire.

[Toni]

I went ahead and enabled Active Exhaust and pin 35 and set them to activate after 2krpm. In evoscan, only the active exhaust activates, the other two pins stay at 0.

pin 35 is request id b5 function x bit 64
pin 48 is request id B5 function x bit 128
active exhaust is B4 and x bit 16

Do these make sense?

ecu config:

pin 35
rpm - 2000
tps - 100
load -10
coolant -36

pin48
rpm - 2000/7000
load - 1/300
coolant - 36

[Toni]

I went ahead and enabled Active Exhaust and pin 35 and set them to activate after 2krpm. In evoscan, only the active exhaust activates, the other two pins stay at 0.

pin 35 is request id b5 function x bit 64
pin 48 is request id B5 function x bit 128
active exhaust is B4 and x bit 16

Do these make sense?

ecu config:

pin 35
rpm - 2000
tps - 100
load -10
coolant -36

pin48
rpm - 2000/7000
load - 1/300
coolant - 36

[Greg E]

I wonder if there is a mistake with the EVOScan request for those bits. Let me verify them tonight.

[Toni]

Sounds good thanks. I'll have some time Saturday so I'll hook up some LEDs to the outputs to see if they work on the wire.