So, I am experiencing an intermittent problem with my '06 Evo RS. All 3 lights on the ACD display are staying lit? The owners manual says nothing except there is a problem and to have it checked out. I am experiencing no driveability issues. The lights will stay on fpr a few days and then go back to normal with just 1 light on. Anyone know what could be causing this issue or where to begin looking.

Thanks!

 

this happened to me and was my acd pump that failed. you can get one used for A LOT cheaper. check out the classifieds here. you should go to the dealer though as they can check the code for the acd to help narrow down the issue.

 

^^Thanks, I had a feeling it might be the acd pump.

 

Have the same problem, my ACD pump died. Here's my thread, scroll down to post #9 and try that first before you take it to the dealer:
https://www.evolutionm.net/forums/ev...d-problem.html

EDIT: I just post it here instead. This will save you from taking it to the dealer to check the code.

get a paper clip and use it to bridge pins 1&4 on your obd
(diagnostics plug) as you sit in the driver seat its in front of your right knee,
when the paper clip is in place turn the key on (dont start the car)
if there are no faults codes the 3 acd lights will flash rapidly.

and if there is fault codes, the 3 lights will flash slower
for example fault code 65

there will be 6 long flashes slight pause followed by 5 short flashes,
simply count the long flashes as 10 : 6x10=60
and the short flashes as 1 : 5x1 = 5
together that's code 65

there may be more than one code.



Quote:
here are the acd/abs fault codes


12 power supply open or short circuit
21 fr right wheel speed sensor open or short circuit
22 fr left wheel speed sensor open or short circuit
23 rear right wheel speed sensor open or short circuit
24 rear left wheel speed sensor open or short circuit
25 wrong diam tyre
26 faulty wheel speed sensor
31 steer sensor system(st1,st2,stn)open circuit
32 steer sensor stn short circuit
33 steer sensor stn system
34 steer system st1 st2 short circuit
41 tps open or short circuit
51 longitudinal acc sensor open or short circuit
52 longitudinal acc sensor
56 lateral acc sensor open or short circuit
61 stop lamp switch system open-circuit
65 abs monitor system open or short circuit
71 proportioning valve system open or short circuit
72 directional control valve right open or short circuit
73 directional control valve left open or short circuit
81 ayc relay system open or short circuit
82 electric pump system
83 electric pump system

 

https://www.evolutionm.net/forums/ev...everybody.html

 

If you have checked for codes and you dont come up with anything and you checked the resevour and its empty or near empty its probably got air in the lines. You should bleed the system. if you need to bleed the system let me know I have a diy section.

 

if you need the acd pump lmk i have it without the solenoid tho jus pump..

cheap btw

 

this is why i like this forum, saved you the trip to the dealer!

 

you da man!! Many thanks to you!!

 

I had my doubts, but the paperclip in the obd port worked! The code I pulled was 74, which if I remember right has something to do with the Propotioning Valve System. It may be a bad electrical connection/plug or or hydraulic unit. Not sure yet, have to run a few more checks to isolate the problem.