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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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p0571 p0504 bcmViews : 926 Replies : 6Users Viewing This Thread : |
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Oct 17th, 2019, 10:28 | #1 |
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p0571 p0504 bcm
hi, new to the forum, my s60 2004 battery was flat.
jump started car now have the below failures. "Brake failure stop safely" on dash trip computer displays -------- odometer stuck on 80356 ABS light on brake light on obda codes pulled P0571cruise control/brake Switch A circuit = ECM-9400 = Brake pedal sensor P0504 - brake switch a/b correlation using hidden menu on dash BCM REPORTS '' NOT CHECKING'' bcm fuses ok, reading on forum it can be BCM, any test I can do to confirm faulty bcm, any other test or advise |
Oct 17th, 2019, 11:40 | #2 |
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Clear the codes then check your battery properly.
Low system voltage can create fault codes so that needs to be eliminated first.
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2002 S60 SE D5 Manual 209000 miles |
Oct 17th, 2019, 14:29 | #3 |
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The 2 codes where cleared,they come back, battery good
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Oct 17th, 2019, 18:24 | #4 |
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Based upon the codes, do you think it might be the brake pedal sensor ?
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V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help |
Oct 17th, 2019, 18:32 | #5 |
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Ok, so now you just use Vida to explain the code and the possible causes and fixes.
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2002 S60 SE D5 Manual 209000 miles |
Oct 19th, 2019, 07:08 | #6 |
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I don't think its the brake pedal sensor at this point.
I currently don't have access to a vida, only obd2 plus torque app. BCM dry joint issue maybe not, as fault only occurred after flat battery and jump start. The built in diagnostics fails to read the bcm states (BCM NOT CHECKING). Following the xemodex bcm flow chart attached, tends to push me in the direction of power relays on the CEM. |
Oct 29th, 2019, 06:51 | #7 |
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update, swopped a and b power relays on cem, still same fault
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