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The "ABS Module" Yarn

26K views 19 replies 9 participants last post by  alfissimo  
#1 ·
I was told today that my 2012 needs an ABS module.

Since we all like a good story, here's mine.

The mighty Touareg has been running well since getting the adblue heater repair kit installed back in April (2015 – since who knows when someone might read this). We’ve been on a few longish rides including a trip on the Victoria Day long weekend to Aubrey Falls Provincial Park (we drove about 1,600 km that weekend), several smaller (400km) day trips here and there and the usual errands around town and nearby Toronto. Definitely no indication of troubles... but I guess that was just the calm before the storm.

Two days ago my wife started the Touareg and the dashboard lit up. The engine started though, so she ran her errand and came home. Dear didn’t stop the engine during her errand. She said all kinds of trouble lights came on and stayed on until she parked and turned it off in our driveway. It drove normally otherwise.

When I got home from work later that night I saw what I assume is the same thing as Dear. The dashboard (drivers screen) indicated that there was a brake failure - sorry though, I don't remember exactly what it said. A number of trouble lights came on too; the diesel coil, the check engine, tire pressure and a few others that I didn’t note. When I ran a VCDS/VAG-COM scan I got tonnes (actual metric tonnes, not simply short tons!) of error codes. Engine, transmission, brakes... even things you wouldn’t expect. I don't recall exactly what codes popped, definitely too many to remember them all, but I kept the VCDS log. The ABS module was unreachable and was noted that way in the log. I didn’t notice any fluids on the driveway during a quick walk-around. Apparently all hell had broken loose and lodged itself within the Touareg's computerized guts.

I figured that some connector must have come loose or corroded just enough to cause these errors. Given that VW has graciously provided the roadside assistance for three years thanks to Diesel Gate, I decided to let them tow my beast to the dealership. I mean, why take the risk if the truck telling you it may not stop.

And that leads to today. The dealer’s technician was finally able to get some hoist time and check things out. Apparently they spent two hours looking at connectors and trying to diagnose the problem. What they decided is that I need, ah correction – my Touareg needs – a new ABS module. Apparently the module costs around C$1100 (dealership) and labour (including the diagnostics to this point) will add another C$600.

It is disappointing that I'd need what most would consider a "lifetime part" at only 107,000km (64,000 miles). And this is after I spent most of my $1000 good will package fixing the adblue heater (though I know they're not related).

So now that I’ve spun my implausible story, I look to you, the think tank that is ClubTouareg, for suggestions, recommendations, your experiences... basically the raison d'être of this forum. :grin2:
 
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#6 ·
Correct, based on T1/T2. Your symptoms match.

We need for some of the others to confirm/deny that this occurs in the later models.
 
#10 ·
The Touareg's battery was replaced in April when I had the adblue heater replaced. I suppose the new battery could be bad, but it seems unlikely. Talking to the service manager, he is convinced it is the ABS module. A new one is on order and so I'll find out mid to late next week if that does the trick.
 
#12 ·
That will teach you to never choose the super saver shipping option. >:)

Hope it arrives soon.
 
#14 ·
Some ABS modules can be repaired. I had the module repaired on my 2004 Range Rover by this guy, CHEAP ABS Module Repair for Volkswagen Passat, saved me over $1000 dollars. It took less than a week with overnight shipping and such and I was still able to drive the truck. Your brakes will still work, you just will not have ABS, speed sensitive steering, speedometer or anything that is speed related. Once put back, everything worked like before.

Marc
 
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#15 ·
End of My Yarn

Well, I’ve had my beloved Touareg back now for a few days. The final repair was completed on Tuesday (3 weeks to the day of the initial symptoms). Everything seems to be working fine. Summarizing my earlier posts...


  • Wife started the Touareg and every dashboard warning light remained lit. Prior to this, there were no warning lights/errors. She had run the truck earlier that same day.
  • Sent the truck to the dealer for repair.
  • The Service Advisor said they spent two hours trying to determine what was wrong and decided it was the ABS Module.
  • I directed the Service Advisor to this thread and specifically mentioned the posts by nickyt. The Advisor assured me that the design was changed for the T3 models with the wiring harness no longer running in that area.
  • I approved ordering the ABS Module on the morning of June 30, and was told to expect it’s arrival by the following Wednesday (note, Canada Day and (USA) Independence Day probably delayed things).

Well, since then the new ABS Module arrived (July 13 or 14, I don’t remember which) and was installed, but it made no difference. The dashboard warning lights remained lit. So back to diagnostics for the mechanic.

The Service Advisor reported that a broken wire was found at the front (I think it was under the hood somewhere) and another broken wire was found at the right (passenger) rear wheel. Both got fixed but then there was still an oxygen sensor issue that the mechanic couldn’t figure out. Apparently the mechanic moved the ECM (on the firewall?) to trace the oxygen sensor wire and finally hit the jackpot... he spotted a mouse nest and several chewed wires. Parts were ordered on the Friday and arrived Monday. Lots of effort to bridge new wires and get things straightened away.

The last issue they had was reported as a tire pressure sensor not working on the driver’s front wheel. OK, maybe the sensor’s battery died. I have a fifth spare tire for offroad use, so I brought the mighty Touareg home. On the drive home the low tire pressure warning light stayed on and the pressure display on the screen remained blank in all wheel positions. Even the front and rear “target” pressures remained blank on the display. Everything else though was good (no other lights). After dinner I swapped the wheels, but there was no joy – nothing changed on the dashboard.

So, placing the former driver’s front wheel in the cargo area (trunk), I returned to the dealership the next (Tuesday) morning. Right away they connected to the computer and said it was now the right (passenger) front tire that isn’t transmitting a signal. So I told them to swap for the wheel in the trunk. They did and then took it for a drive, but they didn’t have any better luck than I did. They decided to keep the Touareg for a while and do more diagnosis... so they gave me a ride to work. Ultimately they found yet another broken wire. They fixed it and all seems to be working now. Hopefully I won’t find anything new when I go on my next long drive.
 
#17 ·
Well, in this case I am sad that it did turn into a wiring harness issue.

Argh! You S T U P I D mouse! What have you done!!! They really do a lot of damage once they get into a vehicle.

I am glad you got that sorted. What a mess. :(

As I was reading near the end, I was thinking that they missed repairing the wire from the TPMS that runs to the right front antenna. The tire shops have a universal receiver that they can hold close to each tire sensor and it will signal if that tire is sending out a signal. It would have been handy if the dealer had one.
 
#19 ·
I see you posted on an old thread but then found your way to your own original thread!