2002 Laguna faulty ecu connector block - Jimmons
I have a faulty connection in a block connector that plugs into the ecu, however according to Renault you cant get the block separately so a new wiring loom is needed!! (£400+ just because of a loose connection) I was thinking, could I cut a plug leaving approx 5cm length of wires from a car being broken and join them to the wires on the end of my wiring loom?

So my question is.... is this possible, or do some of these wires have built in resistances where the values may change and upset the ecu? (even if the wires are the same lengths?)

Your help is much appreciated.

Thanks
2002 Laguna faulty ecu connector block - Screwloose
Jimmons

That's a very plausible repair; just solder and heat-shrink every joint and it should be fine. Just make sure it's from one with an identical ECU part number. There will be dozens.

The terminals in the ECU plugs are - usually - removable and available individually from specialist suppliers. If yours is a Bosch ECU - or similar - then you could probably get matching terminals from - say - VW.
2002 Laguna faulty ecu connector block - LeePower
Are you 100% sure its the connection block that is causing the trouble & not a rusted / broken wire further down the loom?

I would check further back down all the loom & look for any bulges in any of the wires first before cutting the plug off.
2002 Laguna faulty ecu connector block - Jimmons
Thanks for the advice, Renault have diagnosed the faulty connection to be in the block.

Apparently, the wiring loom plug is sealed and the pins are immovable according to Renault.

The ECU is a Siemens unit. So the connection of joining the wires wont affect the ecu (resistances, voltages, etc)?

Thanks

2002 Laguna faulty ecu connector block - Screwloose
Jimmons

Knowing exactly what engine would help; but I can't think of any reason not to replace the plug - if done precisely in the way detailed. If the plug is sealed, how did this one terminal get damaged beyond repair?

Given the quality of most current Renault looms; the repair will probably be the best bit of it.
 

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