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Old 21-07-19, 08:50 AM   #1
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Default Abs not communicating with diagnostic tool

I have a break light on with the stop light flashing. Abs and esp is also on. Initially I could clear it but it comes back but all of a sudden i just stop getting communication with the module. I know for sure my pump is working if not I shouldn’t be getting firm breaking. Some time last week everything cleared off itself but came back the next day.any ideas?
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Old 21-07-19, 04:05 PM   #2
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The physical braking force is not affected by the ABS if ABS is not working. ABS prevents wheels skidding by pulsing the affected brake. So you will always have brakes. What you have probably got is one or more of the wheel sensors not working intermittingly. You need to check each one for signs of damage or corrosion under the sensors, especially on the rear wheels.
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Old 21-07-19, 05:05 PM   #3
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But that doesn’t account for why I don’t have communication with the abs module. If I did, I could easily know the exact abs to sensor to fix. My main issue is that I can’t diagnose abs module
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Old 21-07-19, 05:28 PM   #4
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Hi..as 'mad' says earlier its easy to remove the wheels and carefully remove the rear abs sensors and de-scale the area where the sensor fits,I had the same problem on my 307 and I fixed it quicker than waiting for diagbox to load ....
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Old 21-07-19, 05:50 PM   #5
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No comms is normally a dead pump, corroded terminals in the ABS pump connector or corroded/blown fuse(s) in the underbody fuse box, at least two fuses (one of which is a maxi fuse down the front of the fusebox) or a mixture of any of the above.
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Old 21-07-19, 05:56 PM   #6
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Just to clarify...what make of diagnostic tool are you using?
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Old 22-07-19, 11:50 AM   #7
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I used a pp2000 please can you guide me as to what fuses i should look out for?
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Old 22-07-19, 11:52 AM   #8
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Thanks. I really hope it’s not the pump. Can you guide me as to the location of The fuses to look out for
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Old 22-07-19, 09:36 PM   #9
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Sorry to jump in on this,

But my CV boot poo'd itself, then my abs light came on.

Are the fronts ones as easy the clean as the rears??

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Old 23-07-19, 10:45 AM   #10
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Just jetwash the back where all the goo is then light will go out
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