Where is ecu on renault scenic

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FREE Members Account Features You can find both new and used car parts in a number of ways using our online forms, links, search boxes and also match the correct parts using your cars registration number. The car is a Renault Scenic 3 - with a 1. Hope someone can help me. There's a relay soldered to the board of the engine compartment fuse box, there's 12v going to the relay, relay is switching on and off as normal but only outputting between 1v - 4v.

So when the relay closes it doesn't make a good connection. I have 2 options, option 1 - wire an external relay as pictured this way the internal relay wouldn't be doing anything and the external relay will work exactly the same as the internal faulty relay.

Option 2 - set up an Arduino to turn the relay on and off say 10 times a second without a load on the contacts for half hour and maybe opening and closing will clean the contacts. I suspect since it's been standing for 2 months the contact on the relay might have corroded. I think I'm going to try switching the relay on and off constantly for half hour first and see if that will fix it and with daily use it shouldn't happen again but if it does then go to option 2.

Turned out there was a broken wire between the ecu and engine. I stripped the loom and saw the classic white powdery oxidation on one wire. Pulled the wire and it snapped without any force. I ended up cutting the wire on the ecu side and the other end of the loom and soldered a new cable in between.

Touch wood it's been fine ever since. I'm no mechanic but being a computer engineer who specialises in component level repairs, it wasn't to much of an issue.