Diagnotic socket wiring 2007 C4 Picasso

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Diagnotic socket wiring 2007 C4 Picasso

Post by looxuser » 10 Oct 2018, 12:29

Hello there,

Have a problem on my C4 Picasso where my diagnotic Lexia setup won't talk to the car. I suspect the wiring behind there battery that has been repaired before by citroen,

My Lexia is working fine on my DS3 so i know that good.

No i've exposed the wires to the back the diagnostic port in the glove box and continuity tested them back to the BSI Module but three other wires go in the opposite direction into the loom so some questions please?

1. Anyone got a wiring diagram of the diagnostic socket for car RP11289FV RPO 20312?

2. Does anyone know what these other three wires are and where they go?

3. Anyone experienced a failed BSI that had the same symptoms (they are cheap to source used)?

4. Anyone know how to slide up and out the ECU from is steel holder infront of the engine bay fuse box?

5. Anyone had this issue and know a fix please?

Many thanks, Andy

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Re: Diagnotic socket wiring 2007 C4 Picasso

Post by GiveMeABreak » 10 Oct 2018, 12:38

Hi and welcome.

We'll need a VIN first of all (we can obtain all we need form that and it is masked from public view).

Are you getting any other issues - specifically the dash lights up like a Christmas tree and all sorts of warning lights? I have a specific reason for asking, so perhaps you can confirm that to start with.