S60 Electrics: - p0571 p0504 bcm

ArchieHermanus · Oct 17th, 2019, 10:28

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

cheshired5 · Oct 17th, 2019, 11:40

Clear the codes then check your battery properly.
Low system voltage can create fault codes so that needs to be eliminated first.

ArchieHermanus · Oct 17th, 2019, 14:29

The 2 codes where cleared,they come back, battery good

JoeNinety · Oct 17th, 2019, 18:24

Based upon the codes, do you think it might be the brake pedal sensor ?

cheshired5 · Oct 17th, 2019, 18:32

Quote:

Originally Posted by ArchieHermanus

The 2 codes where cleared,they come back, battery good

Ok, so now you just use Vida to explain the code and the possible causes and fixes.

ArchieHermanus · Oct 19th, 2019, 07:08

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.

ArchieHermanus · Oct 29th, 2019, 06:51

update, swopped a and b power relays on cem, still same fault

Oct 17th, 2019, 10:28	#1
ArchieHermanus New Member Last Online: Jan 16th, 2020 07:49 Join Date: Oct 2019 Location: Hermanus	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
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Clear the codes then check your battery properly. Low system voltage can create fault codes so that needs to be eliminated first. __________________ 2002 S60 SE D5 Manual 209000 miles

Oct 17th, 2019, 18:24	#4
JoeNinety Senior Member Last Online: Apr 14th, 2024 20:23 Join Date: May 2019 Location: Winchester	Based upon the codes, do you think it might be the brake pedal sensor ? __________________ 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

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Oct 17th, 2019, 14:29	#3
ArchieHermanus New Member Last Online: Jan 16th, 2020 07:49 Join Date: Oct 2019 Location: Hermanus	The 2 codes where cleared,they come back, battery good

Oct 29th, 2019, 06:51	#7
ArchieHermanus New Member Last Online: Jan 16th, 2020 07:49 Join Date: Oct 2019 Location: Hermanus	update, swopped a and b power relays on cem, still same fault

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