Been buying allot of pre wired connectors from these people

[remmington]

auto-connectors.co.uk/

[Rhubarb]

The pre-wired engine management ones are a good quality and fit well then Pete?

[valhalla]

I was thinking about this sort of thing only a little earlier today;

Skoda Rapid 2015 TDI, repeat problem of AIT sensor going open-circuit. I had already replaced the AIT/MAP sensor last week, partly a "distress job" as the MoT is imminent, and the MIL has been on and off this last few weeks.

Customer contacts me again on Wednesday this week , "MIL is on again". "Oh deary me, that is such a nuisance", I thought, only in stronger language. I contacted the owner and told him to get it to me sooner rather than later, as the revised MoT date is next week. Whilst looking at the VW wiring diagrams on ALLDATA, I spotted a "bonus" connector that VW had fitted to the four wires, and four more, somewhere between the sensors and the ECM. "That'll be yer problem, Lady!" I exclaimed, then noted that VW had already had a load of trouble with this very same connector, and a TSB is in-place for this sort of symptom. What threw me was that it only affected just the one part of the sensor, not both parts, and it would have to be jolly bad luck for that single wire, of a total of 8, so have failed.

Turned-out I was nearly right; just next to the connector (I found it after ages looking, because VW don't seem to photograph and record their connectors like LR do for the manuals) was a chafed-through bit of insulation, and green-crusty, on just that one single wire. So the repair would have been better if there was a nice tail available, not least that it was a very tight splice up behind the connector, and I could not budge the pins with my back-out tool. As it happens, there was nothing wrong with the connector itself (pins clean and dry) although I greased it all afterwards, and I had already addressed the first part of the TSB by changing the sensor - not because it had failed, but because the pins on that are known to corrode - it's all low down just above the undertray on this circuit......

What was funny was that I had noticed that the signal was drifting - when I first replaced the sensor last weekend - when the engine was cranked. I had thought there might have been an ECM power-supply or ground problem, or a main engine earth problem, and had told the customer that it was the next consideration if the problem had not been fixed. What was actually happening was that the signal line only failed when the engine rocked, as the bit of harness behind the connector (T8g) bridges the void from starter motor (connector bracket) to bodywork. Doh.......!

[remmington]

Feb 9, 2024 9:31:06 GMT 1 Rhubarb said:

The pre-wired engine management ones are a good quality and fit well then Pete?

Yeah good enough quality - nothing been expensive from them.

Always sort of tempted to buy two of anything I order from them - but then I gonna need to label them up - rack them and start a speadsheet for stock - then I will end up with a lot of dead stock I never gonna use (that is paid for). valhalla loves stock - I hate stock.

[remmington]

www.auto-click.co.uk/index.php?route=common/home


I used these allot as well - OldGit sent me the link once. They OK to deal with as well.


I hate depinning plugs - rather solder new plug on with tails.

VAG stuff I been buying "tails with sockets and pins on from TPS" - double ended jobbies - you chop in half!