C25D 1994 EDC Light HELP!!!!!!

[RoshanS]

Hello all ,

I own a 1994 C250 D

My problem :-

The EDC light is on and the RPM meter is off car runs smoothly starts like a baby.

There was this common wiring issue were the outer casing of the wires were disolved with cracks (NOT BURN) so i carefully replaced the wires.

This issue of EDC was there from a long time should comeon and go off and when the EDC light comes on the RPM meter go to zero but the car is running fine.

Any advice shall be good ???

Thanx

Roshan

 

[RoshanS]

Ok just came back from a drive and the EDC suddenly went off and the RPM meter jumped up in action...

Just before this happend the car went in a nice pothole ... so i belive there is some lose connection somewhere ... can someone please tell me how the RPM meter is conected to the engine ?? Vacum or wires ???? and where does it connect

Thanx
Roshan

 

[RoshanS]

WHAT no one here ???

comeon guys .. some ideas ???

Cheers
Roshan

 

[carabind]

It won't be driven by vacumn. As a diesel, it won't be driven by the coil,(as there is none) so guess
it's driven off sensors from either the ECU or teh injectors ?
By the way, what is a EDC light ?

 

[RoshanS]

EDC is Electronic Diesel Controller ... i think not 100% sure

Any idea where the sensors are ?

Roshan

 

[Ultymate]

Most likely using either a camshaft or crankshaft sensor or most possibly both:???:

 

[RoshanS]

Any idea where its location is ?

roshan

 

[Ultymate]

Sorry Roshan I don't have the relevant info available to help you there:???:

 

[C220GJS]

Your tachometer is fed from terminal 14 of the engine electronic control module; you don't say if your car is auto or manual; if it is an auto the K106 kickdown relay is also connected to this terminal and this may be the first item to check.The relay is located in front of the ecus in the nearside rear compartment under the bonnet.

 

[RoshanS]

C22 will check it.

Just came back from the workshop they say it could be the cable going to the injector pump.

What do you think ?

Roshan

 

[C220GJS]

Sorry, I have no knowledge of diesel injection pumps, a specialist subject.