[Tambohamilton]

Originally Posted by Red_Bean_Bun

There’s 4 bus users on the BSD bus line - water pump, alternator, IBS and the oil level sensor.

Unplug them one at a time - clear the each time and find the culprit.

The 4 of them share the line so if one of them have a problem it will affect the other 3.

This.

If one device on the BSD line has failed, it can affect the whole line in such a way that the ECU can't properly determine the culprit, and you get an error code for a part which hasn't actually failed.

For example, if you unplug the IBS and suddenly your water pump code clears permanently, but you get the IBS code (obviously, because it's unplugged), you know that it was a faulty IBS that's triggering the water pump code.

[WilliamFrear831]

Originally Posted by Tambohamilton

This.

If one device on the BSD line has failed, it can affect the whole line in such a way that the ECU can't properly determine the culprit, and you get an error code for a part which hasn't actually failed.

For example, if you unplug the IBS and suddenly your water pump code clears permanently, but you get the IBS code (obviously, because it's unplugged), you know that it was a faulty IBS that's triggering the water pump code.

So if that's the case, do I replace the ibs cable again? As I have done so(replaced cable brand new oem from fcp euro and the actual ibs on the positive terminal but that was a used part from eBay, should be ok though! ) because the water pump does still work and not overheat! Thanks for any input!

[Tambohamilton]

Does the water pump fault clear when you unplug the IBS cable?

[WilliamFrear831]

Originally Posted by Tambohamilton

Does the water pump fault clear when you unplug the IBS cable?

I tried to unplug but a different ibs code came up lol (I did unplug the ibs from positive terminal to wires going in car) I'm going to try to reconnect that one and unplug the one on power distribution block and get bAck! (I think I unplugged the wrong part of ibs haha!

[WilliamFrear831]

Originally Posted by Tambohamilton

Does the water pump fault clear when you unplug the IBS cable?

If it does clear then what is the culprit? Do the water pump again? It does work

[Tambohamilton]

If you unplug the IBS, and the water pump codes can be cleared and stay away, then the IBS is the culprit and should be replaced.

...at least, that's my understanding.

[WilliamFrear831]

Originally Posted by Tambohamilton

If you unplug the IBS, and the water pump codes can be cleared and stay away, then the IBS is the culprit and should be replaced.

...at least, that's my understanding.

I did replace ibs as well (used from eBay) that could be it!! If not though :

[Tambohamilton]

Well, unplug it and see what happens with the codes.

[WilliamFrear831]

Originally Posted by Tambohamilton

Well, unplug it and see what happens with the codes.

Unplugged IBS a just got a different "ibs missing" code and same water pump codes plus a power management code

[WilliamFrear831]

Originally Posted by WilliamFrear831

Unplugged IBS a just got a different "ibs missing" code and same water pump codes plus a power management code

I did do my oil level sensor a while back brand new oem as well. Reads fine so Should be no issues there. Could possibly be alternator but car seems to start fine. Some days better than others but wouldn't it not start at all if it were bad alternator? Anything helps please guys and girls!

[Tambohamilton]

With the IBS unplugged, did you clear the codes to see which ones came back straight away? If you get the same result, that would suggest that the IBS is fine.

The car would still start with a bad alternator, until the battery goes flat. Try unplugging the alternator next, and clear then read codes...

[WilliamFrear831]

Originally Posted by Tambohamilton

With the IBS unplugged, did you clear the codes to see which ones came back straight away? If you get the same result, that would suggest that the IBS is fine.

The car would still start with a bad alternator, until the battery goes flat. Try unplugging the alternator next, and clear then read codes...

When I did unplug ibs and cleared codes, immediately I got just one ibs code that was there for a while, but after about 15-20 minutes of driving another ibs code came up and the water pump codes followed also with a power management code!

[Tambohamilton]

What were the codes? Particularly the power management one?

I'm not sure, but the power management code may be related to a bad alternator...

[WilliamFrear831]

Originally Posted by Tambohamilton

What were the codes? Particularly the power management one?

I'm not sure, but the power management code may be related to a bad alternator...

I bought a new ibs (hella) and the connectors, gonna install it this week and clear codes and give it a go, if still have the codes I'm assuming the alternator maybe be the issue? To test I can just unplug the alternator wire and clear codes? (Wire directly plugged into alternator) right?

[Tambohamilton]

You're throwing parts at it without diagnosing fully. Good luck.

[WilliamFrear831]

Originally Posted by Tambohamilton

You're throwing parts at it without diagnosing fully. Good luck.

These are the codes I'm having. Do you think it's alternator related? New IBS, New water pump, new oil level sensor. New battery Also

[Tambohamilton]

I would check battery voltage when the engine is running. Also what type and capacity is the battery? Was it coded and registered correctly when fitted?

[WilliamFrear831]

Originally Posted by Tambohamilton

I would check battery voltage when the engine is running. Also what type and capacity is the battery? Was it coded and registered correctly when fitted?

Yes battery is good just had replaced at dealer with oem and got coded to car! I'm gonna Drive it today with new ibs and get back! I'm assuming it is indeed maybe the alternator causing all of this!

[autoart]

You can change the regulator, its much cheaper and easier than the alternator.

[WilliamFrear831]

Originally Posted by autoart

You can change the regulator, its much cheaper and easier than the alternator.

Regulator?

[mweisdorfer]

Originally Posted by WilliamFrear831

Regulator?

[WilliamFrear831]

Originally Posted by mweisdorfer

Ok! Might have to give that a try. I got new IBS and still have the water pump codes and a power management so I'm assuming it's the alternator! Should I try the regulator first or just replace the whole unit? Think I almost got it!!!