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relay layout

Discussion in 'A4/S4 forum(B5 Chassis)' started by pjw, Jan 15, 2011.

  1. pjw
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    pjw Member

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    [Jan 15, 2011]
    how can i find out what relay is for what under the drivers knee? ive got the service manual and all it shows is how to remove the whole relay unit :s
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  2. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jan 15, 2011]
    The relays are all numbered, so it shouldnt be too hard to look up the relay number and find out what its for?

    There cant be too many relays under there i wouldnt have thaught?
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  3. pjw
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    [Jan 15, 2011]
    i dont know.. im looking for J106
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jan 15, 2011]
    As i told you before, the ABS relays are all inside the ABS pump/ECU.
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  5. pjw
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    [Jan 16, 2011]
    OK, i just wanted to confirm. Ill give up and go with it!

    Is the module under the rear seat or is it the one on the side of the pump?
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jan 16, 2011]
    As far as i'm aware the ABS ECU is bolted to the side of the pump itself.

    You can probably remove it and have it repaired by someone like BBA_Reman

    The only thing under the rear seat on mine is the control unit for the interior monitoring system
    Last edited: Jan 16, 2011
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  7. pjw
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    [Jan 16, 2011]
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  8. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jan 16, 2011]
    Maybe the earlier cars are different?

    The later ones dont have a box like that, the electronics are all on the side of the pump itself.

    For £25 i'd try changing that ECU pictured if your car has one!
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  9. pjw
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    [Jan 16, 2011]
    Im going to have a look at whats on mine.. But theyre on ebay for next to nothing. If thats where the relay is then its worth a shot?
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