Dashboard Lights

voodoo101 · Post by **voodoo101** » 08 Dec 2010, 16:41

I have just picked up a 1995 Citroen Synergie 1.9td SX with service history and all books. It's done over 200,000 miles but drives well and is clean inside and out apart from an oil leak which I have been told is the rocker cover gasket.

My question is which dashboard lights should be on when you turn the ignition to position 2. According to the manual the engine auto diagnosis light should be on and then go off, however I have never seen this go on.

Is this an error in the book or should this light come on and is just not working?

reblack68 · Post by **reblack68** » 08 Dec 2010, 16:52

Either the bulb has blown or it's been removed because the light was on. If the car is running well I wouldn't worry about it, there isn't much, if anything, in the way of electronics on that engine anyway.

Chris570 · Post by **Chris570** » 08 Dec 2010, 16:52

well actually it depends if the engine has an ecu or not.

i think in 95 they didnt on the td, later on it did...

voodoo101 · Post by **voodoo101** » 08 Dec 2010, 17:07

Thanks for the help. Think I will just forget about it as the engine runs fine.

Never had a car with a warning light that before so it will make no difference to me.

Post by **CitroJim** » 08 Dec 2010, 17:33

Have a look at the front of the Injection Pump.

If it has a cold start electrovalve that looks like the one in the picture below (pointed to by the red arrow) then it won't have an ECU and will not therefore have an Engine Management Light.

Also, if no ECU, the pump will have a cam-operated microswitch on the top of the throttle spindle.

Another possible way to tell is if the car has no coded keypad. These came along (generally, but not always) with the ECU controlled pump.

Lastly, look at No.3 injector (couning from the flywheel end of the engine). If it has a thin black wire coming out of it, then you have an ECU.

It is also possible it once had an ECU controlled pump and this has been swapped for a non-ECU controlled pump. In which case the EM light would have been disabled.