Hey great write up looks like you did your homework

 

Is the ecu for the acd a stand alone so if I install an AEM I can still have it functional.

 

good info

 

Yes, it's its own ECU.

Terry S

 

i have had the 3 red lights on over a year im makin about 450 whp., i have a pump fail. my rear wheels seem to be the only ones recieving power, is this normal when the 3 red lights are on?and why is the rear wheels getting all the power? also am i loseing power cause of this? i plan to fix the pump as soon as i can. just wondering whats going on. thanks

 

in theory, does a USDM model have the potential to have an AYC unit installed that will work with the present ECU's? and the current ACD?

Just curious. If so, who knows, when i win the lotto, I may install one... or just buy a bugatti veyron...

 

alright so i have the 3 solid lights, should i even call the stealership? its been like that for about a year now, and its really starting to get annoying. its only on sometimes, im starting to think that theres something wrong with the damn ACD pump. i did have the transfer case rebuilt a while ago durring a clutch install, the tranny and the t. case were separated, and im thinking that perhaps it needs fluid, maybe the mechanic who did the clutch install didnt (couldnt) check the ACD fluid level after everything was done.

 

Is it a coincidence that my 3 lights have come on after puttin on some aftermarket wheels?

18x9.5 +27mm offset
15mm Front spacers

Would this upset the equilibrium of the system, and send a fault message to the computer?

70k on the clock, drivetrain flush + Service in the next week or to, I rather not bring it to the Dealer yet as I'll have to take off alot of stuff.

 

bigger / different wheels shouldn't hurt the ACD. Check to make sure you didn't unplug one of the sensors in the wheel well by accident. Also, try resetting the ACD by disconnecting the battery for a couple of minutes. I had the fault lights come on once from running the car in gear on the lift without wheels on the hubs, and disconnecting the battery reset things. Good luck!

 

Has anyone had their ACD pump come loose and rattle or vibrate? Mine sounds like it is....Im just hoping I dont have to get a new pump. I will be looking at it on a lift tomorrow.

Thanks

 

If you have an 03 Evo, you wont have an ACD pump...

And to the AYC person question, no it wont work right away because the USDM has no AYC controller. Also, you'll have to do some hack 'n slashing to fit all the pump/reservoir lines.

Terry S

 

Oops sorry I just need to change my sig, I have an 06 now. You can look at my latest post for more info.

Thanks

 

I have always the 3Lights ON ... im really thinkin if i have to change the ACD PUMP ... In my country it cost tooo much $$$, i check already the Fluid of the AYC she is FULL enven Brake fluid is full, i have to check or its a FUSE or Reset the car by taking off the POSITIVE Cable ... IF not, im 100% Sure that its the Pump but the weird that when i turn on the car the light is only on TARMAC after w few seconds the 3 Lights appear ... any more idea or info ???

P.S The Brake fluid of the ACD AYC is on the left when u open the trunk no ???
BTW the ABS is OFF ...

 

3 Solid lights.. This thing keeps going on and off.. started out 10 months ago in Idaho.. 3 solid lights on a cold start (when it snowed)

anyways, it didnt show up for 3 months, now it happens every week.. sometimes it goes away with switching the car off then back on.. 3 days ago i switched the car on and off and it was still there.question is.. how much will it cost to fix it, i have to drive to phoenix to get it looked at by the dealer.

whats the reason behind that fault

thanks

 

did u check the reservoir fluid level ? if its below th erecommended level then u should add some more fluid. and that shoudl fix the issue.