Hi all,
I am finishing off a refurbishment of my 2008 C4 by Loeb and am down to 2 x electrical issues to sort out.
1 :- After start-up the system check puts up a "Braking system faulty" message. Using Diagbox it says the ABS ECU has a permanent fault. Using Lexia to dig deeper it has a fault message saying "under/over voltage to ABS ECU".
2 :- A/C clutch does not pull in when A/C switched on. I read on this forum that the cooling fans have to start before this can happen, they don't come on for me.
Does anyone have a wiring diagram for these systems or the whole car?
VIN number is VF7**************[VIN obfuscated, can be read by forum staff]
Many thanks in advance,
Nicky.
C4 Electrical Problems
Moderator: RichardW
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- Posts: 4
- Joined: 01 May 2020, 20:31
- Location: Belfast, NI
- My Cars: 2008 C4 by Loeb 1.6 16V
2013 C4 Picasso
Re: C4 Electrical Problems
Does the car have ESP? What is the RP number? This is the one circled below on the tyre pressure label.
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- Posts: 4
- Joined: 01 May 2020, 20:31
- Location: Belfast, NI
- My Cars: 2008 C4 by Loeb 1.6 16V
2013 C4 Picasso
Re: C4 Electrical Problems
I'm not sure about the ESP.
RP number is 1139788
RP number is 1139788
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- Posts: 4
- Joined: 01 May 2020, 20:31
- Location: Belfast, NI
- My Cars: 2008 C4 by Loeb 1.6 16V
2013 C4 Picasso
Re: C4 Electrical Problems
Just had a look and there is no ESP deactivation switch. So I presume no ESP.
Re: C4 Electrical Problems
Im guessing the last 2 digits of the RP number are wrong? should be 2 letters at the end.
ABS diagram attatched
The ABS ECU is component no 7020.
As for the other problem, The cooling fans normally cut in a few seconds after the AC clutch. Have you had the refrigerant pressure checked? If the system is empty or low this will stop the clutch from engaging.
ABS diagram attatched
The ABS ECU is component no 7020.
As for the other problem, The cooling fans normally cut in a few seconds after the AC clutch. Have you had the refrigerant pressure checked? If the system is empty or low this will stop the clutch from engaging.
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- Posts: 4
- Joined: 01 May 2020, 20:31
- Location: Belfast, NI
- My Cars: 2008 C4 by Loeb 1.6 16V
2013 C4 Picasso
Re: C4 Electrical Problems
Hi,
Thanks for the reply and diagram.
Can't get the pressure checked at present, will do as soon as possible.
RP number is right.
download/file.php?mode=view&id=22734
Thanks for the reply and diagram.
Can't get the pressure checked at present, will do as soon as possible.
RP number is right.
download/file.php?mode=view&id=22734
- Paul-R
- Donor 2023
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Re: C4 Electrical Problems
88 is the factory ID for Mulhouse I believe. The list of factory ID codes in the Wiki is incomplete. I suspect that it leaves out Peugeot ones and I'm not sure where DS fits now.
EDIT
Wow, I found what claims to be a complete list of factory codes for Citroen. Any chance that the Wiki could be amended suitably?
A2 CENTRE HILLS (England)
CA CENTRE AULNAY (France)
CB CENTRE RENNES BT (France)
CC CENTRE DE CAEN (France)
CH CENTRE DE CHARLEVILLE (France)
CJ CENTRE RENNES-JANAIS (France)
CP CENTRE CHINE CKD AC (China)
CS CENTRE DE ST OUEN (France)
CV CENTRE MEUDON (France)
CX CENTRE ASNIERES (France)
FL CENTRE DE MANGUALDE (France)
FP CENTRE DE PINTO (Spain)
FT CENTRE DE TREMERY (France)
FV CENTRE DE VIGO (Spain)
FW CENTRE DE METZ (France)
G5 CENTRE DE DOUVRIN (France)
G8 CENTRE DE CREIL (France)
G9 CENTRE DE GENEVILLIERS (France)
UB CENTRE DE NEWCO
UC CENTRE DE OLCIT
UD CENTRE DURISOT
UF FORD
UG GRUAU (France)
UH KALUGA
UJ JAGUAR
UK CENTRE CIMOS
UM CENTRE MITSUBISHI (Okazaki, Japan)
UN CENTRE FIAT VILLANOVA
UO CENTRE TOFAS
US CENTRE SUZUKI
UT CENTRE KOLIN
UV VOLVO
UW CENTRE DE WUHAN (China)
UX XIANG-FIANG (China)
UY CENTRE MAGNA STEYR
UZ CENTRE KARSAN
U1 FIAT
U3 CENTRE DE PANHARD (France)
U5 CENTRE PININ FARINA
U6 CENTRE DAIMLER
U7 CENTRE HEULIEZ (France)
U8 CENTRE SEVEL SUD (France)
U9 CENTRE SEVEL NORD (France)
YA CENTRE INDONESIE (Indonesia)
YB CENTRE CHILI (Chili)
YC CENTRE NIGERIA (Nigeria)
YD CENTRE URUGUAY (Uruguay)
YE CENTRE KENYA (Kenya)
YF CENTRE ZIMBABWE (Zimbabwe)
YG CENTRE TURQUIE (Turkey)
YH CENTRE POLOGNE (Poland)
YI CENTRE IRAN SAIPA (Iran)
YJ CENTRE EGYPTE (Egypt)
YK CENTRE THAILANDE (thailand)
YL CENTRE MALAISIE (Malaysia)
YM CENTRE RUSSIE (Russia)
YN CENTRE IRAN KHODRO (Iran)
YP CENTRE MAROC (Morocco)
YQ CENTRE MALAISIE GURUN (Malaysia)
7B BARUERI BRéSIL MAG PR (Brazil)
7D FRANCAISE DE MECANIQUE (France)
71 GEFCO (France)
72 HERIMONCOURT (France)
73 NANTERRE (France)
74 CENTRE DE VALENCIENNES (France)
75 SFME (France)
76 SLOVAQUIE TRNAVA (Slovakia)
77 ARGENTINE BUENOS AIRES (Argentina)
78 BRESIL PORTO REAL (Brazil)
8E CENTRE DE SEPT FONS (France)
8F CENTRE SHERPA
8M CENTRE DE MELUN (France)
81 CENTRE DE POISSY (France)
82 CENTRE DE MADRID (Spain)
83 CENTRE DE RYTON
84 CENTRE DE DIJON (France)
85 CENTRE DE VESOUL (France)
87 CENTRE DE LILLE (France)
88 CENTRE DE MULHOUSE (France)
89 CENTRE DE SOCHAUX (France)
Source http://citroenjin.blogspot.com/2012/12/ ... n-psa.html
EDIT
Wow, I found what claims to be a complete list of factory codes for Citroen. Any chance that the Wiki could be amended suitably?
A2 CENTRE HILLS (England)
CA CENTRE AULNAY (France)
CB CENTRE RENNES BT (France)
CC CENTRE DE CAEN (France)
CH CENTRE DE CHARLEVILLE (France)
CJ CENTRE RENNES-JANAIS (France)
CP CENTRE CHINE CKD AC (China)
CS CENTRE DE ST OUEN (France)
CV CENTRE MEUDON (France)
CX CENTRE ASNIERES (France)
FL CENTRE DE MANGUALDE (France)
FP CENTRE DE PINTO (Spain)
FT CENTRE DE TREMERY (France)
FV CENTRE DE VIGO (Spain)
FW CENTRE DE METZ (France)
G5 CENTRE DE DOUVRIN (France)
G8 CENTRE DE CREIL (France)
G9 CENTRE DE GENEVILLIERS (France)
UB CENTRE DE NEWCO
UC CENTRE DE OLCIT
UD CENTRE DURISOT
UF FORD
UG GRUAU (France)
UH KALUGA
UJ JAGUAR
UK CENTRE CIMOS
UM CENTRE MITSUBISHI (Okazaki, Japan)
UN CENTRE FIAT VILLANOVA
UO CENTRE TOFAS
US CENTRE SUZUKI
UT CENTRE KOLIN
UV VOLVO
UW CENTRE DE WUHAN (China)
UX XIANG-FIANG (China)
UY CENTRE MAGNA STEYR
UZ CENTRE KARSAN
U1 FIAT
U3 CENTRE DE PANHARD (France)
U5 CENTRE PININ FARINA
U6 CENTRE DAIMLER
U7 CENTRE HEULIEZ (France)
U8 CENTRE SEVEL SUD (France)
U9 CENTRE SEVEL NORD (France)
YA CENTRE INDONESIE (Indonesia)
YB CENTRE CHILI (Chili)
YC CENTRE NIGERIA (Nigeria)
YD CENTRE URUGUAY (Uruguay)
YE CENTRE KENYA (Kenya)
YF CENTRE ZIMBABWE (Zimbabwe)
YG CENTRE TURQUIE (Turkey)
YH CENTRE POLOGNE (Poland)
YI CENTRE IRAN SAIPA (Iran)
YJ CENTRE EGYPTE (Egypt)
YK CENTRE THAILANDE (thailand)
YL CENTRE MALAISIE (Malaysia)
YM CENTRE RUSSIE (Russia)
YN CENTRE IRAN KHODRO (Iran)
YP CENTRE MAROC (Morocco)
YQ CENTRE MALAISIE GURUN (Malaysia)
7B BARUERI BRéSIL MAG PR (Brazil)
7D FRANCAISE DE MECANIQUE (France)
71 GEFCO (France)
72 HERIMONCOURT (France)
73 NANTERRE (France)
74 CENTRE DE VALENCIENNES (France)
75 SFME (France)
76 SLOVAQUIE TRNAVA (Slovakia)
77 ARGENTINE BUENOS AIRES (Argentina)
78 BRESIL PORTO REAL (Brazil)
8E CENTRE DE SEPT FONS (France)
8F CENTRE SHERPA
8M CENTRE DE MELUN (France)
81 CENTRE DE POISSY (France)
82 CENTRE DE MADRID (Spain)
83 CENTRE DE RYTON
84 CENTRE DE DIJON (France)
85 CENTRE DE VESOUL (France)
87 CENTRE DE LILLE (France)
88 CENTRE DE MULHOUSE (France)
89 CENTRE DE SOCHAUX (France)
Source http://citroenjin.blogspot.com/2012/12/ ... n-psa.html
Last edited by Paul-R on 02 May 2020, 16:40, edited 2 times in total.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
Re: C4 Electrical Problems
Strange, I've only ever seen letters as the factory codes.
- Paul-R
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Re: C4 Electrical Problems
There's a typo in the Wiki, Aulnay sois Bois should be Aulnay sous Bois.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
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Re: C4 Electrical Problems
For the A/C problem, you should be able to get some clues looking at the live data in diagbox, which will tell you the status of each sensor and control.