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        General >> Problems >> ABS Controller Repair, Help
        
(Message started by: Nunnspoet on Aug 30^th, 2014, 1:12pm)

Title: ABS Controller Repair, Help
Post by Nunnspoet on Aug 30^th, 2014, 1:12pm

Can somebody tell me how to tell the difference between the two different Controllers please.
My Cossie is a P reg Ultima Estate. Also a quick guide on how to remove the Controller from the car for soldering?

Where is the Board situated, I'm guessing under the Pump in the Engine bay, do any brake lines need to be disconnected?

Thanks for any advice.

:) :)

Title: Re: ABS Controller Repair, Help
Post by Tenfut on Aug 30^th, 2014, 4:42pm

Hi

The controller is fairly easy to remove although might result in some scarred knuckles. No need to disconnect any brake pipes. I got mine off in about 50 minutes. (24v).

Click on the car at the top of this page then on Search/map on the left then scroll down to "ABS Modulator" and all the instructions for removal / replacement are there.

As regards the soldering, Tompion is your man for advice

I had a repaired one ready to go straight on

HTH

Tony

Title: Re: ABS Controller Repair, Help
Post by Simmo on Aug 30^th, 2014, 7:29pm

The details are Here (http://www.fordscorpio.co.uk/abscontrollerrepair.htm) ;)

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Aug 30^th, 2014, 9:07pm

Thanks guys, we saw the page for soldering, then eventually found the page for the ABS modulator which describes how to get to the board itself! Anyway, done a few tests and now getting B1342 which seems to be an "instrument panel ECU" fault. So, not sure if this really means the ABS controller OR the actual instrument panel itself!? The airbag light is also playing up so it points to the instrument panel but would value your advice.
Thanks,
Mike & Graham

Title: Re: ABS Controller Repair, Help
Post by amigafan2003 on Aug 30^th, 2014, 9:47pm

You can get dry solder joints on the dashboard too. Worth taking the instrument panel out and checking for continuity.

Title: Re: ABS Controller Repair, Help
Post by Tompion on Aug 31^st, 2014, 12:14am

Take a look here:
http://www.fordscorpio.co.uk/dtcode.htm

From that you'll see that as the code begins with 1 you need to be careful that you look at the correct manufacturer & model codes.

Searching the net for the code (for other vehicles) comes up as various faults not necessarily ABS so chances are you’ll struggle to find a definite answer.

Did the reader you used say "instrument panel ECU" or is that what you’ve found via a search, if you found it in an old Scorpio thread about diagnostics on a non-Scorpio instrument panel then I should ignore it as that was for a different car.
What reader did you use, the obd-2 lead usually gives a brief description of the fault.

If it were an instrument panel fault that caused the light to come on I would have thought the ABS would still function.

You could try unplugging the multiplug & reseating it just in case it’s a bad connection. It’s held with a bolt that draws it off of the controller. Make sure it seats fully when you put it back but don’t go mad just nip it up.

The ABS codes are stored in the ABS module so if you check for codes with it unplugged & no longer get a B1342 that would suggest it’s not the instrument panel. Not sure if you can read codes from the panel anyway.

Title: Re: ABS Controller Repair, Help
Post by GrahamT on Aug 31^st, 2014, 1:02am

Thanks very much Dave.
Mike, my memory, tsch (dont say anything!)
Did it say "instrument panel ECU" on the alex peper lead? I think it did.
The same code showed up on my ELM327 reader also, but didn't give the description.
(or was that the other way around?! :-/ ::) )
Anyway, next step, check for ABS codes again, should show B1342 on the enhanced page, then try again with the big connector disconnected.
Good luck!

Title: Re: ABS Controller Repair, Help
Post by Tompion on Aug 31^st, 2014, 9:31am

Having slept on it I’m pretty sure you can ignore the dash as it’s simply somewhere to put the bulb :) & uses no components other than the tracks from the connector to the bulb.

By comparison the Airbag warning lamp uses some basic circuitry that means a poor connection causes the light to stay on. A bad connection with the ABS however causes the light to stay off.

The very late cars had PATS built into the dash so it’s possible they’re different but I doubt it.

You should find if you unplug the ABS multiplug the light will stay on (because a switch in the plug turns it on) whereas I think (unable to verify on my car) if you leave it plugged in and pull the smaller of the 3 ABS fuses the light won’t come on at all & you won’t be able to read ABS codes.

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 1^st, 2014, 8:23am

Thanks folks :). I am very much encouraged by all your support.

Yup Graham, it did say that, and, I will give it a couple of days before I re-read the codes as she needs to complete a"drive cycle"before she registers codes.

I didn't get anything done yesterday but hope to fiddle about today.

Great advice Tompion, I will start by unplugging the multiplug. We did try the ABS and it did not function. Fingers crossed

Mike

::) :-*

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 1^st, 2014, 10:42am

Title: Re: ABS Controller Repair, Help
Post by GrahamT on Sep 1^st, 2014, 11:41am

Mike, the three fuses (I think!!) are Fuse No. 27 in the central fuse box and Fuses 46 and 47 in the battery fuse box. We only checked one and I think it was the wrong fuse anyway!! ::)

Title: Re: ABS Controller Repair, Help
Post by Tompion on Sep 1^st, 2014, 2:56pm

If you're doing any testing remember the thicker wires (orange/yellow??) fed by the larger 2 fuses 46&47 are permanently live.
Dave

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 1^st, 2014, 5:06pm

Thanks Graham and Dave.

I unplugged, cleaned, re-connected the multiplug, turned on the ign.. The lights went out :). Went for a drive aaannnd 3miles down the road on came the ABS and TRAction control lights. Back home I moved various cables about (Ain't got a clue really) and turned on ign. lights went out - 10secs. came on again. That seems to be the pattern except that sometimes I can drive a little way before the lights illuminate. It is all hit and miss. I am led to believe there is a short somewhere around the Controller area, but where to look is a mystery and now it's RAINING >:(

When I get a chance Graham I will check those fuses. And thanks for the warning Dave.

By the way Graham, the Apple pie is delicious. Ta :-* And I have just picked up a new brake handbrake cable

Mike

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 5^th, 2014, 6:58am

Update.

After a good drive down to and all about Weymouth and Portland, beautiful day :), I did a Pepper's OBD 11 lead scan yesterday and got the following codes from the "Enhanced" section:

C1145 Wheel Right Front Sensor Circuit Failure.

C1259 Speed Wheel Right Front Comparison Failure.

C1178 Speed Wheel Left Rear Coherence Fault.

I hope this is of use. I hav'nt got around to checking those fuses yet, but hope to get it done today.

Mike :)

Title: Re: ABS Controller Repair, Help
Post by Tompion on Sep 5^th, 2014, 10:39am

Mike,

Probably no point in checking fuses given the codes you’re getting now. I take it the light is still on? - codes will remain even when the light goes out.
It’s looking more like a wiring issue, I’ve seen people reporting issues with the wiring in the section towards the multiplug. It’s possible you could have introduced the codes whilst looking for the problem so clear them & see what returns.
It’s not obvious on the OBD11 lead how to clear codes, so if you don’t know, whilst you have codes/enhanced open also open status/enhanced (where the clear button is located). The clear button will reflect what you’ve selected in codes/enhanced.

Dave

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 5^th, 2014, 5:36pm

Dave,

Really good advice once again, thank you. I will have a "play" around the wiring. The lights behave as they should when the outside Temp. cools. Then after a short drive, usually 10 - 100yds. they come on. Though again,at other times, the outside temp does not matter. It's all a toss of the Dice.

Never mind we will get there 8)

Mike

Title: Re: ABS Controller Repair, Help
Post by Simmo on Sep 6^th, 2014, 8:10am

Mike. There might be a clue in the 10 -100yards. I think, and hope Tompion will agree with me, that the actual motor does not cut in until you reach a certain speed. If you think about it there would be no need for ABS at a very low speed? :)

Title: Re: ABS Controller Repair, Help
Post by Tompion on Sep 6^th, 2014, 4:51pm

When you turn on the ignition a basic test is carried out – little more than checking something’s at the end of the wires (if you removed a wheel sensor and connected the two wires together it would pass).
Once you drive off and reach a certain speed (around 20 mph) the sensors are checked for output and some sort of test is carried out on the motor but whether it actually runs I don’t know. If anything fails the light will come on.

As you’ve had different faults after moving the multiplug my guess is it’s a wiring issue.
It is of course worth checking those sensors for faults. The coherency fault (incoherent signal) could be caused by magnetic particles on that rear sensor or sensor ring, too big an air gap between it & the sensor ring or bad wiring.
Magnetic particles on a rear sensor are quite common & can be caused if the sensor ring hits the sensor as a wheel bearing fails. The face of the sensor should be flat but even if it is concave it could be from a previous bearing failure & a concave one will usually be OK unless very worn.

When I was playing with Simmo’s faulty controller I managed to get layered faults – I couldn’t see the underlying faults I’d introduced until I fixed the fault I could see. That’s one of the reasons I suggest you clear the faults in case they were redundant ones hidden by the B1342 code you started with.
Its faults that cause the light to come on during the rolling test not codes (they don't have to be cleared to pass) hence it’s a good idea to clear them & see what remains after the static test or comes back after the rolling test.

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 9^th, 2014, 8:44am

Excellent food for thought and action.

I hope to clear the codes this a.m. and have a wiggle about. My gut feeling is a fault in the wiring. After a wiggle about she went for 3 miles faultlessly before the lights came on. My thinking is that when I move the wires/cables I "unshort" the shorting wire and that the wiring returns to its "shorting" position after a short time.

My main worry is that I do something wrong and end up with this car off the road as I need an Automatic to get about. My other Scorp is up on a hoist at my local garage, hopefully it will be all done and dusted by the weekend

I could give the sensor rings a good blast with the hosepipe. What do you think?

We will get there. ;D

Mike

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 9^th, 2014, 9:49am

Ookaaay.

I have just re-read the enhanced ABS and Traction Control fault codes:

C 1145 SWSRFICE. Speed wheel sensor right front RF input circuit failure.

C 1148 SWSRFCF. Speed wheel sensor RF Coherency fault.

C 1259 SWRF. Speed wheel RF Coherency failure.

A little different, I think, and to my mind all pointing to the Front Right sensor having failed or the wiring to have a short somewhere.

Will the sensor from a 2.9 Ultima Estate fit my Cossie okay?

Mike

Title: Re: ABS Controller Repair, Help
Post by Tompion on Sep 9^th, 2014, 11:56am

It's strange that you had a coherency fault rear left that has gone only to be replaced by a coherency fault on the front right.
The sensors are the same across the range – but a different type on the front to the rear ones.
You’ll be very lucky to get a front one out without breaking it. To clean the front ones you have to get under the car & remove the inner plastic cap. I’ve never seen any significant dirt on a front one – a bit of dust & rust shouldn’t matter as long as it’s not flaking rust. I wouldn’t use a hosepipe in case the bearing seal lets by.
I’ve seen 1 report of a cracked sensor ring causing problems but that appears to be unusual.

Title: Re: ABS Controller Repair, Help
Post by GrahamT on Sep 10^th, 2014, 12:19am

Mike,
We measured the front sensor after getting similar DTCs and it measured ok (which is a fairly good sign the sensor is ok).
It may be a bit of rust or something on the ring so when you come up I'll use the compressor to blow it out and see if it makes a difference.
See you next week! :-)
Graham

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 10^th, 2014, 7:40am

:). Ain't I glad I didn't rush about doing things, Dave. ::).

I shall bide my time till I get to visit you Graham on Monday. 8).

Getting there folks!

Mike

Title: Re: ABS Controller Repair, Help
Post by Tompion on Sep 10^th, 2014, 11:02am

Carefully check the sensor lead in case it’s rubbed on the tyre.

Somewhere??? I have a crossover lead I made up to switch sides of the sensors but I wouldn’t be able to get it to you by the weekend (assuming I can find it). The idea being if the codes swap sides its sensor related, if it remains on the same side its wiring related.

Dave

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Sep 11^th, 2014, 9:05am

You are brill Dave.

Thanks again

Mike

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Nov 26^th, 2014, 7:56am

Would you believe it. I just did a write-up on this subject, went to post it and hit the reset button. Waaaa :'(

I've run out of time and will have to come back later.

Mike

Title: Re: ABS Controller Repair, Help
Post by Simmo on Nov 26^th, 2014, 8:01am

Mike. Please do so as this is probably one of the most important and frequently asked about issues on these cars. :(

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Nov 27^th, 2014, 9:26am

My pleasure Simmo.

Since my last post of 11th. Sept.,thanks to Graham who made up "cross over cables" I did cross over the cables. It made no difference so I re-instated the original configuration, still no difference

Now then, I have had this problem for a few years - It did not bother me too much until the ABS and Traction Control lights entered the arena of the MOT. During this time I noticed that in the Summer months the lights usually failed to go out. In the Winter they behaved perfectly except in mild weather when good behaviour became erratic.

To the present: Following the Electrical tests done by Graham and crossing over the Cables to no avail I have been waiting for these cool mornings to arrive. So at 7am. yesterday with the Temp at 5.5C. I turned on the Ign., all the dash lights came on and went out as they should. I started her up without touching any pedals or switches - the warning lights stayed out. I let her tick over until normal operating temp - lights stayed out. I left her ticking over for another 10mins. - lights stayed out. I then sat in the car and twiddled all switches, switching on the lights, also pressing the Brake Pedal several times - the lights stayed out.

I backed her up and moved off - the lights stayed out. 20mph. - the lights stayed out. Then waaa! they came on and then went out, then they came on and stayed on for about 200yds. then they went out for about 200yds only to come on again and stay on. So I parked her up till this a.m when at 8am. with the Temp at 3.5C I turned on the Ign. All warning lights came on and went out as they should. I did notice that the first red warning lights to go out were the ABS and Traction Control lights. Now I come to think of it; during cold weather this is what happens, whilst in slightly warmer weather the other warning lights will go out first followed by the ABS and Traction Control lights, a sort of delayed action, and this only happens in slightly warmer weather usually followed by them illuminating as soon as I drive off.

I am pretty much convinced that the fault lies in a failed soldered joint within the Modulator - when it is cold there is a connection, as soon as it gets warmer the connection is broken. I also think that the connection, during cold weather, can be broken by bumps in the road, hence the lights illuminating and extinguishing intermitantly on our lovely local road surfaces.

There is a fix which Dave ::) has carried out and I wonder if you could help me out? I thought I could replace the Modulator with the good one on my N reg. Scorp, however the Part No's differ. My icky Scorp is P reg. Also as my N reg has done 152,000miles I don't really want to go rummaging about her wiring.

That's it for now.

Mike :)

Title: Re: ABS Controller Repair, Help
Post by Simmo on Nov 27^th, 2014, 11:42am

Mike. Thank you for your update. Two things spring to mind. First there are differing controllers particularly where you have TC. It is bigger as it has additional ports.The second thing is where is the unit fitted?. Is it on top of the FOS wing and underneath the round black motor or is it fitted vertically just behind the FOS headlight. The latter being much easier to remove. (I've seen Dave swap that sort in a pub car park!) ;D As a first step you might just disconnect the lead from the motor to the controller and spray the contacts to see if that helps?. Otherwise it sounds like a soldering job. I'm sure Dave will pick up on this shortly. Good luck, Mike. ;)

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Nov 29^th, 2014, 8:10am

Sorry for the delay in answering Simmo. Been busy and interrupted so to speak.

The Unit is on top of the front offside wing and underneath the black motor, as you suggested. I have looked on the Site and although it is a bit of a fiddly job I should be able to remove it okay, just hope the securing nuts under the wheel liner are not too rusted.

I seem to remember loosening and backing off the main plug but not taking it off completely and giving it a good spraying..I was a bit concerned that I could cause a short unless I disconnected the Bty., which I am loath to do 'cause it means re-coding the Radio aaannd without the display I always seem to get it wrong ending up with no Radio for ages thanks to the Time Out balooney. Might do it anyway :P

Of course, turning on the Ign. these cool mornings everything appears perfect. The MOT is out of date so I'm scared to take her out for a run.

Thanks again, Simmo.

Mike

Title: Re: ABS Controller Repair, Help
Post by Simmo on Nov 29^th, 2014, 10:27am

As a first step just undo the lead from the motor to the unit and spray that. ;)

Title: Re: ABS Controller Repair, Help
Post by Tompion on Nov 29^th, 2014, 7:12pm

You could just pull the 3 ABS fuses before disturbing it.

Dave

Sent you a PM

Title: Re: ABS Controller Repair, Help
Post by Nunnspoet on Dec 1^st, 2014, 7:06am

Thanks Simmo and Dave.

I will do as suggested by both of you :).

Got your pm Dave, and have just now replied. 8)