Kandiru vs. Airbag 1:0!!!
OK, airbag igniter #1 and 2 at module 15 showed "resistance too high", and reading a lot about this fault, and out of desperation i took the airbag off again and did a "tuneup" on my pin reinstall job, painstakingly cleaning every pin on the clockspring and MMI connectors using wire insulation dipped in alcohol then used a small drill to enlarge the diameter of the yellow 12-pin connector openings just a bit, then rubbed inside the females (yum) with alcohol then very little rosin. The pin extraction business is a messy job, even with VAG specific tools, as the micro molex females have a spine to snap into the middle groove and permanently rest there, extraction breaks this spine off, and you can see by the spines on the purple retaining pin that the assembly is meant to be permanent.
I then did reattach, but alas, still codes. After i bathed the 3 kids, went back with the VAG.com, did VCDS with fault deletion four times, with each sequential sweep off went the airbag error, followed by the parking brake, lastly a third sweep killed the ABS error.
$$$ well deserved to Ross-Tech, knowing also all the little additions that will follow.
My advice to DYI airbag upgraders: DO NOT MESS WITH THE YELLOW 12-PIN CONNECTOR! Instead, transplant the S4 OEM # 8K0 971 589 G harness (buy an extra one off ebay.de in advance) reverse the MMI 1 and 2 pins on the black connector and build a Y connector for the the 2 ground plugs on the round airbag. The reason, even variances in contact surface can induce changes in resistance (too high), which in turn will induce Airbag and Parking Brake Failure MILs, loss of parking brake automatic disengagement (very bad for hill starts), and ABS fault.
To recap, parts used:
1. R8 V10 wheel: 420 419 091 B TNA
2. TT Round airbag with silver ring around the 4 rings: 8J0 880 201 L 6PS
3. OEM S4 harness: 8K0 971 589 G
4. OEM S4 12-pin connector: 4H0 972 208 F
The STE95978 terminal connector and the OTC5900A
Torx master kits were very useful, high quality stuff too.
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