warning lights on with ignition off.

hi my c3 dash warning lights stay on with ignition off also petrol gauge and temp gauge and speedo not work when driving car had bsi away to bba raman come back no faults found with it, the car is a 2002 c3 1600 with 60 k on clock.Anybody any ideas please.

john r1 wrote:hi my c3 dash warning lights stay on with ignition off also petrol gauge and temp gauge and speedo not work when driving car had bsi away to bba raman come back no faults found with it, the car is a 2002 c3 1600 with 60 k on clock.Anybody any ideas please.

Petrol gauge, temperature gauge and speedo sound like they are related to the COM2000 unit

Our COMM2000 topic



But if you wanted to diagnose the faults before changing parts, all the tests you need to do are available in Lexia clone tool, which has a topic here .

Quick update been told its probly instrument cluster fault next question could i get second hand unit or would it need coding in ?

john r1 wrote:Quick update been told its probly instrument cluster fault next question could i get second hand unit or would it need coding in ?

A second hand one for the same or earlier year will work, but the mileage will be matched to the highest one recorded.

If you get a later model one, you may need to update the BSI software to allow communication. I don't know what changes were made on which years, just be prepared to connect lexia to check communication.

update car has been ok for weeks now problem returned had it read on lexia faults are communication fault with multifunction screen ecu also air con ecu,control panel and comfort network plus clutch switch,i have friend with same car so i swoped bsi,ecu and key fob car started ok with the same faults so ruled out bsi,also theres a crackling noise coming from small speaker under dash on drivers side, only way to get ignition to go off is remove the shunt fuse.also i have noticed that the parking sensor light on the switch flashes even with car locked up.

john r1 wrote:also i have noticed that the parking sensor light on the switch flashes even with car locked up.

There is a red light that is central on the dash that flashes when the car is locked.

john r1 wrote:so ruled out bsi,also theres a crackling noise coming from small speaker under dash on drivers side, only way to get ignition to go off is remove the shunt fuse.

Maybe a loose connection somewhere, with the crackling and the connection bus faults.

at long last found the fault,with the reverse sensor switch flashing i thought i would take a look a reverse module took bit of research to find it,under carpet below drivers seat low and behold it was swimming in water so disconnected it and all electrics returned to normal.now need to find a new module.

john r1 wrote:at long last found the fault,with the reverse sensor switch flashing i thought i would take a look a reverse module took bit of research to find it,under carpet below drivers seat low and behold it was swimming in water so disconnected it and all electrics returned to normal.now need to find a new module.

That is good going, need to find the leak too. Try here on ebay for the reverse light switch, its common to quite a few models so supply is plentiful.

hi its not reverse switch its the rear parking sensor module thats located under drivers seat the car must have big water leak as the floor panel was full of water totally submerging module,cant seem to find one on ebay phoned dealer they are £160 plus vat so think i will just not have reverse sensors now lol.

john r1 wrote:hi its not reverse switch its the rear parking sensor module thats located under drivers seat the car must have big water leak as the floor panel was full of water totally submerging module,cant seem to find one on ebay phoned dealer they are £160 plus vat so think i will just not have reverse sensors now lol.

Sorry, I was a bit confused as I wasn't aware that the 2002 models had parking sensors fitted.

There are a couple of different part number parking sensor ECUs fitted to the early C3 models. If you could attach photos of the stickers on the ECU box, it may help someone identify a cheaper replacement unit.