Electrican help please? Citroen C4GP ABS wiring mare (fixed)
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
Its the same as this one.
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
I found this diagram. I think this is it.
Thank you for the help it's much appreciated.
Thank you for the help it's much appreciated.
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
Look at this photo - it is similar to the one you have although not the same - but you get the idea - there are little numbers on the corner pins of the plug - you can then work out what is what:
Just make sure you check the numbers on your own plug as again this is another type of plug and you don't want to use a diagram for another plug
Just make sure you check the numbers on your own plug as again this is another type of plug and you don't want to use a diagram for another plug
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Marc
Marc
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
Yes your diagram is the male side where I posted the female side. I'll probe the plug end and see what voltages I pick up and see if they correspond with the info you shared. Thanks for your help!
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
I did some testing and I have gnd where I should and +V where I should apart from 7112A pin 32 Angle sensor 12V power supply. I wonder if this should be +V all the time?
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
It indicates +12 V Power Supply for 7112A and 7112U - which goes to the ESP accelerometer gyroscope (7804)
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Marc
Marc
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
Ok I checked the voltages and everything look good. My initial problem here is with a few cheaper OBD reader I get no comms with the ECU. With Diagbox & Lexia I get an ECU, ABS ECU incoherent fault (U1208), but it does scan through the different systems and read fault codes. I presume the fault on the car is effecting the CAN bus. Since I cant disconnect the ABS/ESP ECU from the circuit to isolate from the CAN bus and test , I'm not sure where else to go other than buy another ABS unit and hope it solves the problem. I don't really like this idea as its not diagnosing the fault really. The symptoms with the car is that the ABS fault light comes on the dash every so often and when it does happen seems to do so at lower speed e.g 46kph. Not sure where to go next.
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
This is what I have for Fault U1208. This may give you some more pointers to check - but if the wiring is faulty (as per that last video) it may make it hard to diagnose short of checking the wires individually. The worst case scenario is that if you do order a replacement you should be able to return it if it proves that the fault is still there.
Fault code | U1208 |
After sales description of the fault code | No communication with the engine management ECU fault : Data invalid |
Description of the diagnostics | Possibility 1 - The time for recording the fault code is 500 milliseconds - The clutch pedal sensor values sent by the engine management ECU are not coherent with those of the ESP ECU Possibility 2 - The time for recording the fault code is 500 milliseconds - The datastreams from the engine management ECU are not valid Possibility 3 - The time for recording the fault code is 500 milliseconds - The accelerator pedal sensor values sent by the engine management ECU are not valid |
Conditions of activation of the diagnostics | Ignition switched on |
Conditions of disappearance of the fault | Possibility 1 - Clutch pedal sensor values sent by the engine ECU coherent with those of the ESP ECU Possibility 2 - The datastreams from the engine management ECU are valid Possibility 3 - The accelerator pedal sensor values sent by the engine management ECU are valid |
Down-grade modes if fault present | Possibility 1 - The anti-lock braking system (ABS) function switches to down-grade mode - Immediate cutting of all the speed control functions (Electronic stability control (ESP)) Possibility 2 - The anti-lock braking system (ABS) function switches to down-grade mode - Immediate cutting of all the speed control functions (Electronic stability control (ESP)) - Hill start assistance function inactive - Switching of the electric parking brake to manual mode Possibility 3 - The regulation functions remain active - Hill start assistance function inactive - Switching of the electric parking brake to manual mode |
Switching on of the warning lamp and/or warning message | Possibility 1 - Possibility 2 - Warning lamp ESP/ASR Possibility 3 - Warning lamp ESP/ASR - Electric parking brake automatic functions deactivation warning lamp - "SERVICE" warning lamp |
Main customer complaints likely | Lighting of the ABS and ESP warning lamps |
Suspect areas | Connectors CAN network ESP ECU |
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Marc
Marc
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
Thanks Marc, Do you have a way of identifying my ABS Unit part number? Looks like I have to get it off to see those numbers. Car drives ok so don't want to take it off until I have a replacement to put on. Otherwise could be off road a couple of days sourcing right one. Thanks.
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
No problem - 4541EY was the original the part number, which was replaced with 4541QE. So 4541QE is the one you need.
Now if you're sitting down...
From Citroen brand new these are £1,576.72 inc. VAT
There's one used on the bay here for about £400:
https://www.ebay.co.uk/p/Citroën-C4-Gra ... 1409556115
Now if you're sitting down...
From Citroen brand new these are £1,576.72 inc. VAT
There's one used on the bay here for about £400:
https://www.ebay.co.uk/p/Citroën-C4-Gra ... 1409556115
Please Don't PM Me For Technical Help
Marc
Marc
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
I found one 4541QE, 0265950962. Since the Citroen PN fits I wonder if this unit will work?
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
4541QE is the Citroen part number. As long as the supplier is quoting this number it should be fine. I can't speak for the other number as that is not a Citroen part number.
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Marc
Marc
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
I also need help with problem related to the ABS/ESP wiring.
In older Citroen Xsara Picasso a vehicle speed signal is taken from ABS, in newer C4 Picasso i need the same thing but I can't find it and don't want to test wire by wire because don't want to make a bigger problem.
Also, any location of wire that drives a vehicle speed signal is ok for me.
Vin number is VF7**************[VIN obfuscated, can be read by forum staff]
In older Citroen Xsara Picasso a vehicle speed signal is taken from ABS, in newer C4 Picasso i need the same thing but I can't find it and don't want to test wire by wire because don't want to make a bigger problem.
Also, any location of wire that drives a vehicle speed signal is ok for me.
Vin number is VF7**************[VIN obfuscated, can be read by forum staff]
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
GiveMeABreak wrote: ↑15 Nov 2018, 18:21 It indicates +12 V Power Supply for 7112A and 7112U - which goes to the ESP accelerometer gyroscope (7804)
Nice phrase....sounds well well out of my diy mechanic-ing "comfort zone"
Regards Neil
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687 Trinity, Jersey
687 Trinity, Jersey
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Re: Electrican help please? Citroen C4GP ABS wiring mare (fixed)
It seems to me that 12v is high for pulse signal,or maybe it isn't?
All I know is that signal has to be a pulse, maybe some information about pin number, color of wire, I saw numbers on wires, but I can't see all numbers because of isolation over wires...
Thanks a lot...
All I know is that signal has to be a pulse, maybe some information about pin number, color of wire, I saw numbers on wires, but I can't see all numbers because of isolation over wires...
Thanks a lot...