Non-starting Mk1 Leon Cupra

[libiza2007]

Any help or suggestions welcomed

My car had developed a fault resulting in it being unable to start, when ignition is on i get the following lights up on dash - battery, handbrake, tcs, abs, water and oil. However the epc or engine management light don't show.

Car turns over fine but does not fire up. Any one else had this issue??

 

[libiza2007]

also tried vagcom to look for any faults, but fails to communicate with Engine 01, however tried ABS 03 connects fine and a has fault 01314 logged!

 

[adam cupra 20vt]

01314 - Engine Control Module

01314 - Engine Control Module: No Communications

Possible Causes
CAN-Databus Wiring/Connectors from/to Engine Control Module faulty
Fault(s) stored in Engine Control Module
Possible Solutions
Check CAN-Databus Wiring/Connectors from/to Engine Control Module
Check Measuring Value Blocks (MVB)
Usually Measuring Value Blocks (MVB) 125+ show the current Communication Status



01314 - Engine Control Module: Check DTC Memory
Possible Causes
Fault(s) stored in Engine Control Module
Possible Solutions
Check Engine Control Module for Fault Codes

Special Notes
Engine Control Module stored a Code which influences other Control Modules Functionality.
To clear this Fault Code you will need to correct the Problem in the Engine Control Module first.


I had this code the other day in my breaking system scan and it was to tell me I had a fault code stored in the normal DTC scan bit.....if yours won't actually start tho and you have no other codes perhaps you have a fault with your ECM.

 

[libiza2007]

Just wondering, would a faulty coolant temperature sender prevent the car from starting?

 

[LEE69]

Just wondering, would a faulty coolant temperature sender prevent the car from starting?

Yes, but generally when the car is warm.

Mate had an earthing fault in his ECU, you are not even getting the EML light on the dash.

 

[libiza2007]

No not getting epc light or eml on dash, i assume the ecu only has one ground connector, or am i wrong? i can see one on the bulkhead but is there another lurking somewhere?

 

[libiza2007]

Could this possibly be a fried ecu? also is it a common fault?

It's kind of puzzling really because it started 3 days ago and was intermittent but now both lights (epc+eml) on dash refuse to light up!

 

[Steely]

Could this possibly be a fried ecu? also is it a common fault?

It's kind of puzzling really because it started 3 days ago and was intermittent but now both lights (epc+eml) on dash refuse to light up!

a long shot but tried disconnecting the battery and allowing the ecu to soft-reset?

 

[libiza2007]

Will give it a try tomorrow, how long generally for ecu to reset? 10-15 mins?

 

[brad1]

Will give it a try tomorrow, how long generally for ecu to reset? 10-15 mins?

I believe its take the negative off and leave for 30 mins ideally or can leave it for longer if you wish too

 

[libiza2007]

I believe its take the negative off and leave for 30 mins ideally or can leave it for longer if you wish too

Thanks Brad1, will leave neg off for a good while, iirc does the throttle body make a whirring sound or something once battery is reconnected?

fingers crossed this works tomorrow

 

[brad1]

Thanks Brad1, will leave neg off for a good while, iirc does the throttle body make a whirring sound or something once battery is reconnected?

fingers crossed this works tomorrow

No worries mate, I wouldnt know about the whirring sound, i own a tractor

 

[LEE69]

Could this possibly be a fried ecu? also is it a common fault?

It's kind of puzzling really because it started 3 days ago and was intermittent but now both lights (epc+eml) on dash refuse to light up!

It was an earth inside the ecu.

 

[libiza2007]

Update!!!!!

Well here goes, removed scuttle panel, wipers etc this morning to gain access to ecu, took both plugs out and the ecu (where pins are) was absolutely soaked.

Then i dried it out but on closer inspection i found a pin had broken off the ecu (due to the water residue and rust i presume). Turns out this pin was 12v live feed to the ecu, so as a temp fix i found a little bit of wire and inserted into plug (in place of broken pin), leaving a little bit sticking out so it makes contact to ecu, and hooray car starts!!

So just wondering now if anyone knows if this can be fixed permanently? or would i just be better off buying a second hand ecu?

 

[LEE69]

You need an ECU repairer really, or if you can get another ECU and then have it matched to the immobiliser via vag com