2003 bmw 325 xi transponder issue

I'm working on a 2003 BMW 325XI for a customer, installing a compustar FT-6200S-CONT remote start with the RF-1BAM remote. Everything works, test it with the key in the ing. But cant seem to bypass the transponder when i install a key in a box. I've used compustar transponder bypass module with different ways of strapping the antenna loop. I've also used a 556u with the antenna loop and hard wire to the factory ring but no luck. Ive read talking about 2 green wires coming from the ing and using those to tap on too, to use the factory ring. But ive tap the 2 black wire coming from the actual factory ring in the key cylinder. I got 2 keys, they both have the lock and unlock buttons. Those any body have any suggestions? Thanks in advance.

use a 556uw and set for 60 loop winding.

use a valet key as well, heard many issues with master keys left inside the car.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Is the 556u different from 556uw? Also the valet key meaning the one that has no keyless buttons? Thanks for the quick response.

the 556uw i believe has more inductive wiring to pick up the data from the key. and yes the valet key has no buttons just a blank cut key with chip.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Ok just called the customer and his going to go ahead and order that. Now how would i wire the 556uw once i get the valet key.

same as a 556u, power, ground, gwr.

wire loop euro style. cut the loop off and tap right into the immobilizer ring.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

You're a fast learner Ted, can I now retire from being the BMW guru?
But before I do that here's a shortcut on that vehicle.
RED / yellow constant via timer feeds to the trunk dome lights, diodes 1N4004 in line near the lights, bands towards the lights, otherwise every 3 or so arms, the alarm will trigger (spikes going through the bulbs from the BCM).
Don't bother with removing the glovebox to get at the BCM, it's a PITA to put back.
Driver side under dash and kickpanel, under dash for your ignition and lights wiring, tach at data link, black wire pin 9, adjacent is a puddle lamp, RED / blue POS door triggers.
Kickpanel, open up loom coming from door (a right PITA) WHITE/ black lock, RED / blue, unlock NEG trigger; extend lock time for comfort close.
Hood switch is BROWN / green doesn't matter it's at a plastic housing at engine false bulkhead, right hand side. Not plain brown.
Right hand side, floor loom, go to rear of driver's seat, less wires, grey/lt. green trunk release, apply a POS 5 amp fused. Trunk trigger, WHITE/ brown, NEG.
Make the vehicle violet ACC a second ignition otherwise it won't start.



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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

no you cant retire just yet, even though you deserve to

i cant say i know BMW inside out, but i assisted in a few start/alarm installs (03-08). not the easiest car to do, but they are doable with time. the bypass used was also a 556uw so i know them a little more now. The newer version of the bmw 08 3 and 5 series, we (my other installer buddy) used the INT-BMW2/EVOCAN and almost everything was done via canbus. just a few wires to hook up.


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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Absolutely right, I wouldn't go any other way on E90 on.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

not the cheapest car to install on either, the 2 modules alone make up the price of the install alone.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert