lexia help

boristhespie · Unread post by **boristhespie** » 07 Feb 2011, 16:26

tried lexia in c5 hdi for first time but kept getting unable to communicate with ecu.

I checked all connections were okay.

I used sequence in instruction printout that cam with device.

Any hints

ps. battery is lowish on charge.

addo · Unread post by **addo** » 07 Feb 2011, 21:20

What stage are you reaching with the Lexia? Is it prompting you for the RPO?

boristhespie · Unread post by **boristhespie** » 08 Feb 2011, 00:54

I get the screen daying turn off and on ignition. I click to communicata with ecu.

addo · Unread post by **addo** » 08 Feb 2011, 01:24

So, you've started the laptop, selected the right model of C5 by photo matching with the images, plugged in the diagnostic lead, switched on the key and left it on, entered the RPO, and then when you hit "Enter" no dialogue occurs?

boristhespie · Unread post by **boristhespie** » 08 Feb 2011, 07:36

Not sure what rpo is but that seems right. Just says cannot comminicate with ecu as if it aint there. As said have checked conn3ctiins and all okay.

Batter low so could this affecr itt. Just hopin the cash spent on lexia aint been wasted

citronut · Unread post by **citronut** » 08 Feb 2011, 08:16

are you leaveing the ignition switched on??, as it needs to be,
but maybe your battery is to low

the rpo No is RP No. usualy 4 digits on the VIN lable were ever it is on a C5,

regards malcolm

boristhespie · Unread post by **boristhespie** » 08 Feb 2011, 12:26

Thought about that. It never asked for any number. I did think iy would.

Just a little stumped

Sl4yer · Unread post by **Sl4yer** » 08 Feb 2011, 19:36

Try it with the engine running, and just hit Enter when it prompts you to turn the ignition off and on. That will eliminate the flat battery as the cause.

James