AHF functionality, WFS, or comparison and connection to the 1Z

hello,
Okay, I've started my renovation/remodeling project.
This means installing an AHF automatic transmission from a 1998 Bora into my trusty 35i 1Z.

Yesterday, I checked and labeled the wiring harnesses.
I want to connect the AHF cable to the 1Z connector so that I can properly plug everything in .

You can't find anything about the WFS in the plans, at least not in the ones I have.

I read that the WFS (Waste Heat System) was an extra component on the 35i, while on the AHF, it's integrated into the instrument cluster.
My question is:

Can I connect the "old" WFS to the new STG? Is there any documentation available, such as a wiring diagram? I want to ensure that the original KI (instrument cluster) remains functional.
If that works, theoretically, can I still use my old key?

If none of that works and I have to convert to a Bora KI (instrument cluster), where is the reading coil located on the Bora, and how is it connected?
I have a plastic key for the car; does it contain a transponder?

What also makes me suspicious is a twisted pair cable that is labeled as a "bus," but to my knowledge, there is nothing connected to the connector on the device itself...

I'm asking all tech enthusiasts for help!
Sure, no problem!

Best regards, Matthias.

As you correctly identified, your 1Z model has an external WFS (Water Flow Sensor) box. In the Bora, this component is integrated into the instrument cluster.

Problem #2: Your 1Z has WFS for IMMO generation I, while the AHF control unit has IMMO generation II.
You will need at least one IMMO II WFS box and the corresponding transponders for it.


In both vehicles, the reading coil is designed as a ring around the ignition switch.

Yes, even the small plastic key has a transponder.


Why don't you get an AFN STG from a 35i, for example? Why not just get a suitable AFN from a 35i altogether? It has the same power and torque.

Okay, thanks for the information!

Well, it's too late now...

The background also involved financial issues.

I bought a complete set of something from a bookstore, more or less.

Engine with transmission (including power steering, air conditioning, alternator, etc., hoses, etc.)
Harness with uncut control unit, and key with plastic key head.

The price was 500€, and I couldn't say no. It's hard to find a transversely mounted (engine), especially one with that much capacity.
Okay, so that explains why AHF...

So, it means I have to install the Bora system...
Where can I get documentation for the WFS? Specifically, documentation only for connecting to it? Or are there really only two pins for the read coil (pins 2 and 17?)!

Is there an explanation for the bus lane, or can I ignore it?

"Thank you!"

Best regards, Matthias.

Hello,
Is the AHF still the intermediate-wave motor with EU2 certification? Am I correct in assuming that?
What type of oil filter adapter does the AHF use? Does it also include models like the 1Z/AFN, etc., with the hanging screw-on oil filter?
It's actually quite annoying when it comes to the AFN, and I've been looking for a while for conversion options to use a standing model with a replaceable filter insert.

Best regards,
Daniel

No, the AHF is a D3 engine without an intermediate shaft and with a side-stream filter. Golf 4, just.

No, AHF is a D3 engine without an intermediate shaft and with a side-stream filter. Golf 4, just a Golf 4.

I've read several times now that the AHF only meets EU2 standards without a Russian filter.
Therefore, only the ASV should be equipped with the D3 engine as standard, and it should be the only 81 kW VEP-TDI model to have it.

EU2 also convinced me to believe a Leon driver who claimed that the AHF was still a shortwave motor, just with 'new' peripherals.

SprintDriver wrote:

Therefore, only the ASV should have the D3 as standard equipment for its 81kw VEP-TDI engine.

No!

AHF = D3
ASV = EURO 3

Only the AGR model (90 hp, variable valve timing, wastegate turbocharger) has EURO 2 emissions and comes from the factory with only a red color.

All other TDI and SDI engines in the Golf 4 platform had a minimum of... D3.

AHF = D3
ASV = EURO 3


Thank you, you just need to ask the right people.

In other words, does the AHF system, when used with a Russfilter PM2, meet the requirements for a green sticker?

Best regards,
Daniel