Loose connector in the ECU box

Luuk_vdb · Sep 11, 2024

Hello!

I've been having some issues where the car throws out 2 codes: P1636 - Throttle valve control circuit and P0102 - MAF sensor - low input. I could not get the car out of limp mode.
Replaced the MAF and code P0102 went away, but i could not find the problem with the throttle. The car stayed in limp mode the entire time.

This was until I messed about in the ECU box, where I found a connector with some tape on it. I touched it a bit and the code just magically went away when i reset it. When I moved it while the engine was running the engine stalled.

Does anyone know what this connector is for? And why would it be cut off???

Luuk

4004 · Sep 12, 2024

Doesn't look standard. Check the pinout on WDS

PG_E46_Mtl · Sep 12, 2024

Have to agree, BMW doesn't do same color cables especially on the same connector, so this is not from the factory. It's worth trying to see where it leads.

Luuk_vdb · Sep 12, 2024

Thanks for the replies.

I have no idea how to find the connector on WDS, is there an easy way to find it or am I just an idiot? There is no label on the cable or connector anywhere, and the only info on the internet I can find is that it's a permanent 12v supply. Also the car won't crank when I take the plug out.

Obviously I can always do it the old fashioned way and just follow the wires.

325TI_Compact · Sep 12, 2024

Looks like those are 12V suplly wiring to one of relays or little black fuse box.
Just use a multimeter to measure.

Loose connector in the ECU box

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