Post 582830 by JamesT5 on 2013-03-10 17:32:03
I thought I would post a thread on how to change the ABS Module on the Phase 2 V70 as I've taken mine off for a repair and once you have the module off, it's basically a reverse process to put everything back on. It's a good chance for me to put something back in to the forum as I don't aways get the chance. I'm also going to mention some of the things that crop up when doing this job as well as a useful tip for one stage of the job in particular, as I think it may be useful.
Now first of all for the record, I'm not a mechanic or anything close to being a mechanic yet I was able to complete this job quite easily once I'd got around one slight stumble in the middle, a stumble with a simple solution as I will mention. The actual unit is located on the nearside of the car under the engine compartment fuse box.
Tools needed:
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[*]Torx 30 Screw Driver
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[*]2 x Flat Headed Screw Drivers
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[*]4mm E5 Torx Driver
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[*]10mm Socket Spanner
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[*]Short and Long Extention Bars for your Socket Set
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For those of you like me who need the extra background information, the ABS/STC 'unit' is a combination of 2 components, the main ABS/STC Control Module (the electronic side of things), and the ABS/STC Pump assembly. In this guide, I will be explaining how to remove the computer module from the pump which does not cause brake failure, leaks or anything else, it just means that your ABS and Traction Control system will not work until you replace it with a working unit. Considering that if you are changing this then your ABS/STC system is probably faulty anyway, it's not actually going to matter that much. The photo below shows the 2 components seperated from each other....
1) There is no requirement to disconnect the battery on this job but you can if you really want to. I will advise removing the 2 x 30 Amp fuses from the fuse box in the engine bay that are associated with the ABS/STC system, and do this before starting the main job keeping them in a safe place until later. The fuse numbers are '14' and '19' and are shown in the photo below.....
Use the fuse puller provided to remove the fuses....
2) Remove the air filter and air filter housing as follows...
a) Remove the 2 screws connecting the MAF sensor to the air filter housing (top) using the Torx 30 Screw Driver. You may need an extention bar to reach the lower one as shown in the picture....
b) Now pull the MAF Sensor away from the air filter housing (this may take a bit of a wiggle and some gentle manipulation)....
c) Unclip the air filter housing lid from the lower housing and remove the lid, then remove the air filter (the filter just lifts straight out).....
d) Unclip the grey connector from the side of the air filter housing (left hand side if looking at it whilst standing in front of the car facing the engine bay)...
e) Now remove the lower air filter housing (or base). This got me stumped to start with because it's held in by some special clips, but the technique is to get your 10mm socket spanner and push down on the 4 clips on each main clip. This squeezes them together and then at the same time, pull up gently on the air filter housing and then it will pop off. Do this for each of the 3 main clips holding the housing to the car and you're sorted.....
Technique shown more clearly with the air filter housing removed (this is just to demonstrate it to you more easily)....
Once the housing is all out you should have a scene similar to this one....
3) Look under the fuse box and you'll see the ABS/STC unit. Now remove the small electrical connector (n/a on some models) from the side of the unit as indicated by the arrow on the picture. You may need 2 flat-headed screw drivers to help you with this. Also, the picture shows the view of the unit as if looking from the front of the car in towards the engine bay now that the air filter housing has been removed....
4) Using the 4mm E5 Torx driver, unscrew the 4 (later cars, 3), screws from the top of the ABS Module. The unit is upside down so you'll feel like your working from underneath (if that makes sense). Once you have these out then the black ABS Module will come away from the pump with a bit of a wiggle. To demonstrate the screw removal more clearly, I've taken a photo of the screws coming out of another unit that was off the car.....
5) Finally, remove the large electrical connector to the main module and the module is now off, this should just pull off with a bit of a gentle tug and wiggle. Please note there may be a black plastic flap that covers the main connector, this just lifts up and down but is connected to the actual plug (as seen in the following photo)....
6) To replace the unit with a repaired or new one, simply follow the steps in reverse order, remembering to reconnect everything back up again.
Things to consider...... You will get the following error messages if you don't replace the unit (i.e. drive around whilst your unit is away for repair and don't fit a replacement in the meantime).....
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[*]Fault Code (DTC) P1633 Vehicle Speed Signal (your speedo isn't working) :D
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[*]Engine Emissions Light will light up
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[*]The car will tell you that you have a brake failure. It hasn't, it's the car that's confused!
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[*]ABS and Tracs Lights will continue to show
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[*]Remember your ABS and STC system will continue not to work
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[*]Don't take your car for the MOT with it like this - it WILL fail! ;)
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Other than that, a pretty simple job. Any questions, please ask!
Regards
James