Some questions about my X5

[wpoll]

Originally Posted by 80stech

They are 2 seperate resets one is for the oil wear, the other is for the transfer case/clutch wear.

Really? Never knew that - must have a look for the second one. Where did you see it, 80stech?

Not that I would use it - I can only image it would be used when replacing internal parts in the transfer case (clutch packs etc.). In which case you might need to replace the classification resistor also, although goodness knows how you would ever be able to do that...

Again, from Autologic: -

"Manufacturing tolerances lead to varying curves of the multi-disc clutch. Because of this, the actual locking torque is measured on a test bench during manufacturing. Because of varying manufacturing tolerances in the transfer case when they are manufactured, a resistor equalling these locking torque characteristics is mounted to the transfer case. Every time the engine is started, the transfer case control unit measures the resistance and the correct program map is selected."

So it seems if you change anything internally, it really needs setting up from scratch again - not something an adaptation can adjust for...

I dunno...

[Muleears]

Originally Posted by wpoll

I can't say exactly what the VTG oil wear adaptation reset does but it certainly does more than simply clear/reset a distance counter. When you run the job in DIS, the transfer case does a whole bunch of whirring and buzzing, moving the clutches through their full range by the sounds of it. It does this several times, each time sound a little different.

It then prompts you to read the adaptation values and confirm that they have been zeroed (via a query to the VTG).

Everything I've read about this system also indicates that any wear code that is set is not only related to mileage travelled. Autologic state: -

"Oil Monitoring is performed by the VTG control module to determine when service is due. Service due is indicated by a Fault Code. Additional details are available using an advanced BMW scan tool. Service functions provide direction on changing the transfer case oil and updating the VTG control module with the necessary reset and adaption procedure, which is extremely important for condition based service (CBS).

The VTG calculated transfer case and clutch wear is based on amount of slip, torque, speed, mileage and can account for road conditions. Service intervals will vary based on individual vehicle use."

YMMV...

Earlier this evening I read all the codes stored in my X with my new Foxwell NT510. Unfortunately at this point I had little knowledge of what I was looking at... I did store it all however. I do remember seeing the term "VTG" also. I will see if I can connect to my laptop tomorrow and figure out what it is trying to tell me. The X had several stored codes, but only one that tripped the MIL. Apparently I have an oxygen sensor mis-behaving. Some of the others involved the pano roof, steering angle sensor, side marker bulbs etc. I'll sort it out tomorrow and bring back a concise report. Thanks to everyone.

[Muleears]

Just a quick pic of the results on the Foxwell relating to the VTG code. Does this make any sense to anyone? TIA

Sorry about the sideways post... I'll fix that next time.

[wpoll]

Originally Posted by Muleears

Just a quick pic of the results on the Foxwell relating to the VTG code. Does this make any sense to anyone? TIA

Sorry about the sideways post... I'll fix that next time.

The 53FF code relates to power on the module (KL15 plausibility). Not currently present so maybe someone once unplugged the module while it was powered up?

The 55C4 is a faulty calibration. Again, not sure what would cause this - a bad servo gear perhaps, or the same "unplug" event?

I would clear both codes and see if they ever come back. It seems there may have been an issue once and someone may have dealt with it but not reset the codes.

[80stech]

Really? Never knew that - must have a look for the second one. Where did you see it, 80stech?

You are doing the second one (adaptation reset) when you hear all the noises coming from the transfer-case. This can be done at any time and doesn't reset the oil wear AFAIK
DIS will take you through the other reset (mileage based) when the oil wear code comes up.
It's been awhile though but that's how I remember it.

[wpoll]

Originally Posted by 80stech

You are doing the second one (adaptation reset) when you hear all the noises coming from the transfer-case. This can be done at any time and doesn't reset the oil wear AFAIK
DIS will take you through the other reset (mileage based) when the oil wear code comes up.
It's been awhile though but that's how I remember it.

I didn't have a code, I changed my fluid preemptively. I recall the whole process being one series of steps. I guess I don't know DIS well enough (yet!) to know if you could jump into this "test schedule" part way through and just perform the oil wear reset. Or may that would be a different "test schedule" if a code was present.

Here's the video I followed - see from about 5'30".

https://www.youtube.com/watch?v=Ol4PofF-fZY

[Muleears]

Speaking of transfer case fluid, I see several different part numbers for the BMW stuff. I can get a couple different kinds from Amazon ($52-$60). The nearest dealer to me is about 40 miles. Which one and how much do I need? I see on the label it is Shell TF 0870, there are other products (made in Germany) that are TF 0870 also and much less expensive (like half). If they are the same, I'll go with the cheaper ($32). I would think 0870 is 0870 no matter who bottles it. Or is this a false economy? Saving $30 for 60K miles of use. What say you?

[wpoll]

Originally Posted by Muleears

Speaking of transfer case fluid, I see several different part numbers for the BMW stuff. I can get a couple different kinds from Amazon ($52-$60). The nearest dealer to me is about 40 miles. Which one and how much do I need? I see on the label it is Shell TF 0870, there are other products (made in Germany) that are TF 0870 also and much less expensive (like half). If they are the same, I'll go with the cheaper ($32). I would think 0870 is 0870 no matter who bottles it. Or is this a false economy? Saving $30 for 60K miles of use. What say you?

I can't get any other options where I am so I used the updated OE BMW Power Divider Fluid from the dealer - DTF 1 part number 83222409710 - which supersedes the original TF 0870.

[Muleears]

Originally Posted by wpoll

I can't get any other options where I am so I used the updated OE BMW Power Divider Fluid from the dealer - DTF 1 part number 83222409710 - which supersedes the original TF 0870.

If you don't mind my asking, how much is a quart of the new stuff from the dealer? If it's not much more than the old stuff it may be worth it. You only need a quart, correct?

[wpoll]

Originally Posted by Muleears

If you don't mind my asking, how much is a quart of the new stuff from the dealer? If it's not much more than the old stuff it may be worth it. You only need a quart, correct?

Yes, 1litre (close to a quart) is enough.

Can't really help with price, mate - I'm in New Zealand! I paid about NZ$85 fwiw...