O.K.:
I am wondering if there is any known way to diagnose why my acd warning lights come on (all 3 lit).
Here is the guts of the problem. in janurary 05, i spun out my evo and had some light damage to the front from sliding backwards over some rough terrain. i ended up changing the bumper, intercooler and oil cooler cause of this. there are
a few lines that got a little bent/crimped on the behind the intercooler, I am not sure if they are for acd or not, so i don't want to assume that's the problem, have to take off the whole front end for nothing.
For the next year or so, I never really drove more than 25 miles at a time, and the few times that i did, the acd lights lit up only once or twice. i checked the fluid level, and found that it had gone down a little, but after filling it up right away, i found that when the engine cooled off, the level had returned back to normal, henseforth overflow.
Now, every time i drive more than 20 miles, the lights lite up. I can reset the lights really quickly by turning ignition off and back on right away, but i want to solve the problem. If the problem is simple, i would definately fix it myself, for i have a fear that our local mitsu dealer will take at least a week to fix it.( we have only one dealer, and they have proven to be extremely slow w/ evo's!)

So if anyone has any way to "pull a code", similar to the way we would for regular engine trouble would be helpful.

 

Any help on this subject would be greatly appreciated.

 

My ACD lights come on too! mostly they come on when im driving it hard for a while and doing hard turns, they only turn on once in a while though? and yes I just turn the car off and turn it back on and its fine... maybe a glitch? I would like to know also.

 

There's a diagnostic trouble codes for the ACD .. if you can pull it .. I can tell you what it is ..

When the all 3 lights lights up...there's a failure mode detected which can be reset by turning off and on again .. also .. the lights will go off once the failure is no longer present ..


for now here's a list of possible failures ..(ALOT)!!

Any of the 4 wheel speed sensor failures
open circuit / short circuit
steering wheel sensor
TPS sensor
Pressure sensor to the ACD
Longitudinal G sensor fail
Lateral G sensor fail
Stop lamp switch (!!) <-- interesting
ACD mode button stuck
parking brake switch
ABS malfunction (probably triggers the ABS also)
ACD proportional valve failure
ACD pump malfunction / failure
ACD control unit failure

 

I will pull it, but i need to know how. would it be the same as pulling a check engine code?

 

let me rephrase my question.
Can I get acd trouble codes w/ a normal obdII scan tool?

 

I run LED light bulbs in the brake lights, and it has been acting a little weird. i wonder if thats the problem?
anyway, do these codes come up in a normal obdII scan? i.e. are they P1, or P0 codes?

 

If you can get codes you would probably need a MUT III tool to do it.

 

can't afford a MUT III, and I would just go to the dealer for that anyway, I just want to be able to pull a code so I don't have to go to the dealer.
I just want to know if it is a P0 or P1 code able to be pulled from a standard scan tool???
(i.e.) I don't want to get raped by the dealer for a loose wire.

 

SO I am trying something different.
Took out the spyderlytes, and the led taillight, and am going to run stock bulbs for a while. the stop lamp switch might actually be the culprit, since I didn't have a problem until after i put a set of LED's in.

 

sorry .. for now I only know MUT can pull the codes .. it's slightly different from the standard OBD protocols ..

I think the stoplamp switch refers to the one on the brake pedal itself .. and not the physical lights ..

lets go by elimination method..
change the LED and see if that's the cause (doubt so .. but)
Fault appears when you're driving straight with no turns (hmm host of things including a dead/dying ACD)
Fault appears during turning ( steering wheel angle or wheel speed sensor or lateral g sensor)

No fixed pattern .. most likely an intermittent open circuit somewhere .. trace when the last time you did electrical work ..

under hard accel or decel .. probable ACD pressure / pump / switch problem .. longitudinal g sensor problem

work it slowly .. good luck !!

 

changed out bulbs, back to regular....
so far, so good, drove 100 miles today and no problem!!!!
anyway, i'll probably switch back to led later, i'm waiting for a set of Luxeon 3w bulbs for the tails. going to be way brighter than the spyder lites. but this time i'll put on a load resistor as well.

 

great news .. fingers crossed !!

Good to know my little info helped ..

 

Yeah, thanks, I would have never put any thought to my lights, w/o it, but once i saw your post, I knew right away what the prob was. going to drive tommorrow again to see if it still is o.k.

 

well, a week later and it's still o.k.
Thanks a lot for the help, cause i would have never equated running led bulbs to acd fault.

so for all the people 05 and up using leds, make sure you add in a load resistor.