jetta 97
Vendor
On Immo 3 cluster you can't adopt key normal way, because cluster is not talking to ECU , You have to do manually editing in eeprom.Hi everyone, I just found this thread.
I did this swap a few years ago with a 2001 IMMO2 MFA cluster. The ECM is always responsible for computing preglow time, and the stock -EB module does send the correct messages to the warning lights. All that was necessary was to put a couple of small resistors - I think I used 330 Ohm - between the GP and emission MIL pins and terminal 15, so the controller would not set "lamp inoperative" codes. The same should go for the ABS lights, but I do not have the original module, so one from MY1999 may need the same resistor treatment to prevent the lamp out codes from being set. The only thing that doesn't work out of the box is the SRS. It is not attached to the powertrain data bus like the other two/three modules (ECM, ABS, and TCM (optional)). To make the SRS lamp work, you will most likely have to adapt the cluster hardware to make it work. One lazy/temporary option is to use the brake pad warning lamp, since it works the same way.
That should save you some time otherwise spent modifying more hardware than necessary.
For the IMMO, I just did the same thing jetta, 97 did - use a working transponder key with a reading coil. Otherwise, the IMMO screams at you each time you start the car. To maintain the single-key setup, I just mounted the transponder and coil to the back of the instrument panel. You have to obviously do the key matching, using the panel's SKC.
You did trick with resistor but to do it right way all lights , check engine , glow plug and SRS has to be rewire on circuit board to work properly on 99.5 cars.
Here is how to rewire cluster:
http://forums.tdiclub.com/showpost.php?p=3185904&postcount=70
You have to do this way because 99.5 controllers was talking direct to cluster and 2000+ cars via CAN BUS.