ABS Brake ECU Location?

Topic: ABS Brake ECU Location? (Read 2059 times) previous topic - next topic

ABS Brake ECU Location?

September 02, 2011, 08:48:25 pm

Hey out there , Just picked up the coach at Paso Robles Truck Center with 2 new rear brake rotors new axial seals. They can't find the ABS ECU to clear the code ,so the ABS light is still on. They said you wave a magnet in front of the LED's on the ECU and it clears the light. Where is the location of the ABS ECU . 1996 U320 M-11 Engine. Thanks Art

Re: ABS Brake ECU Location?

Reply #1 – September 02, 2011, 09:22:51 pm

On my 95 its dead center in the second bay (the smaller one).

Re: ABS Brake ECU Location?

Reply #2 – September 02, 2011, 09:27:18 pm

On our 97 it is located on the wall next to the Aqua Hot over flow bottle.
Pamela

Re: ABS Brake ECU Location?

Reply #3 – September 02, 2011, 09:34:09 pm

What does it look like ? Art

Re: ABS Brake ECU Location?

Reply #4 – September 02, 2011, 09:48:45 pm

Silver box, forward wall, cables going into it from up top.

Re: ABS Brake ECU Location?

Reply #5 – September 02, 2011, 09:54:25 pm

Here is the best I could do
Pamela

Re: ABS Brake ECU Location?

Reply #6 – September 02, 2011, 10:56:22 pm

You've got the later version. Earlier version was just a simple aluminum box with a decal.

Re: ABS Brake ECU Location?

Reply #7 – September 02, 2011, 11:21:44 pm

Thanks for everyone's help! BUT listen to this. I found it with your help, so I called the shop and they said the Midland is old and a piece of Crap but they didn't say crap . So they don't know how to turn off the light, so they said we might have to Disable It, I didn't like that answer. Can anyone give me an answer about how to reset the Midland. It worked fine when I took it in , before
the new rotors, How can that be? Please HELP Art

Re: ABS Brake ECU Location?

Reply #8 – September 03, 2011, 12:03:55 am

Call James Triana at Foretravel on Tuesday and ask him.

On Friday, September 2, 2011, prevostart <art.twaddell@gmail.com> wrote:

Quote

Thanks for everyone's help! BUT listen to this. I found it with your help, so I called the shop and they said the Midland is old and a piece of Crap but they didn't say crap . So they don't know how to turn off the light, so they said we might have to Disable It, I didn't like that answer. Can anyone give me an answer about how to reset the Midland. It worked fine when I took it in , before the new rotors, How can that be?
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Quote

Art
1996 U320 40'

Re: ABS Brake ECU Location?

Reply #9 – September 03, 2011, 07:35:45 am

When I had my seals replaced the sensors near the disc brakes were pushed out of place.Thy had to be pushed back in.

Re: ABS Brake ECU Location?

Reply #10 – September 03, 2011, 08:38:00 am

Art, My ABS is a Midland DGX which may be the same as yours, The word used when I had to work on it was not as mild as CRAP. I had to disable it as no parts are available.
I will attach a diagram but these vary from coach to coach .
Gary B

Re: ABS Brake ECU Location?

Reply #11 – September 03, 2011, 10:07:02 am

Its quite possible the depth isn't set correctly on the sensor. The Sensor 'counts' the teeth on a toothed ring on the axle. They have to be close enough together. You can actually put a VOM on the output cable, spin the wheel and see the pulses created.

It is NOT unusual for this to happen after brake work... In the 'early' days of ABS some systems (Bosch) actually used an 'ablative' cap to properly set the depth. Basically it was a plastic cap that clipped onto the end of the sensor. The toothed ring then wore it down.

Lots of places just tap them back down with a hammer.

I've also seen places that 'forgot' to reinstall the ring. I've seen rings that were so clogged with rust and grease that the sensor couldn't count teeth.

Re: ABS Brake ECU Location?

Reply #12 – September 03, 2011, 10:16:11 am

Gary: Thanks for your reply , if you look at your wiring sch, It is close to mine but just a little different. The info sheet will help.
Thanks Art

Re: ABS Brake ECU Location?

Reply #13 – September 03, 2011, 08:13:25 pm

Quote from: Gary Bouland – September 03, 2011, 08:38:00 am

Art, My ABS is a Midland DGX which may be the same as yours, The word used when I had to work on it was not as mild as CRAP. I had to disable it as no parts are available.
I will attach a diagram but these vary from coach to coach .
Gary B

Gary B.,
I heard you can get parts for it at O'Rielly's Auto Parts. Heh, heh.

Re: ABS Brake ECU Location?

Reply #14 – September 04, 2011, 07:58:38 am

Rick, When I told the girl behind Oreillys counter that I needed an ECU she slapped me and threatened to call the cops.

Re: ABS Brake ECU Location?

Reply #15 – September 04, 2011, 12:08:06 pm

Hi Art,
When the factory did the rear rotor on our 1997 320, they had to adjust the clearance/depth on the sensor to get the light to go out. After replacement the light stayed on when leaving the factory. Quick turn around, back to factory, and Bob Irland adjusted the sensor with a six foot digging/pry bar type tool! Hi tech at it's best. It has been fine the past nine years.

Raymond

Re: ABS Brake ECU Location?

Reply #16 – September 05, 2011, 08:31:56 pm

Hello Raymond
I found your forum by a friend of mind that lives in Washington. Anyway i live in Paso Robles, ca and i have a 1998 u295 36ft and i have delt with Paso Truck Center and i would go to Diesel RO on tank farm rd. in SLO. Give Mike the owner a call and he will be able to fix your problem one way or another. His phone number is 541-2049. Also give James Triana a call at Foretravel because he is the best, i know i have called him on different problems and he has talked me through them, and it worked.
If there is anything else i can help you with, give me a call at 805-610-2819, my name is irwin&suzi is my wife. Good luck.

Re: ABS Brake ECU Location?

Reply #17 – September 12, 2011, 08:59:33 pm

Picked up the coach early today and they fixed it, Before I took it back last Tuesday I read the resistance on my OHM meter
and the wheel sensors all read 1.22k except for the left rear it read 1.79k . So they did find a part and installed it and it
works again. Hoorah!!!!!!!!!!!!!!!!!!!!!!! Art The wheel sensors are not Midland.

Re: ABS Brake ECU Location?

Reply #18 – September 13, 2011, 07:38:29 am

Art,
Do you have a part number/manufacturer of the wheel sensors? If not, can you get it from the shop before the info is lost for future reference?
Thanks

Re: ABS Brake ECU Location?

Reply #19 – September 13, 2011, 09:36:27 pm

Rick: The Volvo part # WI 85106610 Or the Manufacture is Wabco Part # TDAR 955342 PRTC is a Volvo Truck Dealer

Re: ABS Brake ECU Location?

Reply #20 – September 14, 2011, 06:42:15 am

Art,
Thank you.

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