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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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phase one abs probsViews : 687 Replies : 5Users Viewing This Thread : |
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#1 |
New Member
Last Online: Aug 16th, 2020 21:17
Join Date: Aug 2012
Location: Taunton
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have volvo s40 phase one,the abs light stays on.no codes in the ecu so assume light circuit is earthing out somewhere.found a wiring diagram which implied terminal 13 of the ecu was light circuit,cut this wire under air box[before wires under rad]and light stayed on ,so not that wire.wiring on ecu multiplug implies that terminal 21[brown and black] is the wire as this makes a contact in the multiplug when unplugged[abs failsafe] this wire however does not appear under loom going to bulkhead under the airbox,is there a multiplug i cant see somewhere where the wire changes colour? hope someone can help
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Volvo S40 2.4 SE 2004 |
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#2 |
New Member
Last Online: Aug 16th, 2020 21:17
Join Date: Aug 2012
Location: Taunton
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Anyone!
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Volvo S40 2.4 SE 2004 |
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#3 |
New Member
Last Online: Aug 16th, 2020 21:17
Join Date: Aug 2012
Location: Taunton
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Does on one have any ideas on this, my MOT is due next month and really need to get it fixed.
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Volvo S40 2.4 SE 2004 |
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#4 |
Master Tech
Last Online: May 18th, 2020 10:57
Join Date: Dec 2006
Location: On Contract Dubai Automotve Technical Academy
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If the are no codes then I would be looking at checking all powers and grounds to the ABS ECU. If the ECU has not powered up it cannot give a fault code nor can it send back a self check completed signal to put the dash light out.
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#5 |
New Member
Last Online: Aug 16th, 2020 21:17
Join Date: Aug 2012
Location: Taunton
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all powers and earths are present as far as my wiring diag shows,which leads me to think a problem with light circuit not ecu
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Volvo S40 2.4 SE 2004 |
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#6 |
Experienced Member
Last Online: Yesterday 23:23
Join Date: Jun 2007
Location: L/H side
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are you aware that there are 2 live feeds and earths at the ecu plug? check both .. The most likely cause for this is a corroded feed wire to the ecu in the loom under the radiator . Volvo did a repair kit which meant running new wires from the ABS fuse in the fusebox across the front and joining them at the ecu plug ...
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