D3 - Retrofit Bluetooth to Replace Fixed Handset

[brasiliangringo]

Originally Posted by PsYcHe

Guys,

Just replaced my fixed Audi/Motorola phone kit with the bluetooth module from Audi. Not the rSAP unit by the looks of it, but still better than the one in the car as it wouldn't read any of the SIM modules I had (read my Dad's ancient Virgin SIM, so was actually working).

Anyway the kit I was supplied with had some cables attached and a 36-pin unit within the 54-pin connector for the module, the BT aerial and some MOST cables which it turns out I didn't need as I already had a kit in the car.

Fitting was relatively simple once I'd found the correct wiring diagram (thanks to Figure11 for pointing me to erWin) as all the documentation I could find on the web was for the US OnStar to BT conversions which have different pinouts.

Procedure:

1 - Unbolt the passenger seat. it doesn't need to be removed completely, just tilted back out the way (put the backrest forward and lift the seat base up to max for best clearance), you may need to wind the seat forward and back to access the bolts (T50).

2 - Remove the plastic trim along the kick plate next to the door. This just lifts up then pulls up and towards the back of the car.

3 - Unclip the seat power cable from the guide at the bottom of the seat.

4 - Pull the carpet forward from the air vent under the seat a bit, it's split at that point already, being careful not to strain the power feed for the chair which goes through a hole in the carpet about 6 inches in front of the split.Then lift the carpet from the door side.

5 - Unclip the seat power from the holder under the carpet and push the carpet back towards the central column (using the seat rails to hold it out the way).

6 - the Car Kit is in the box to the far left nearest the door hinges, pop it open and disconnect all the cables.

7 - Get the 36-pin connector for the BT kit, and the 42-pin connector for the old kit side by side and pop the followin pins from the old connector into the new positions on the old connector leaving the rest behind.

OLD - NEW
33 - 14 - Diagnostics
42 - 11 - MIC +
41 - 12 - MIC -
15 - 10 - Terminal 31 (or Earth to the rest of us)
16 - 2 - Terminal 31
35 - 1 - Terminal 30 (or +12V for real people)

Pin 3 on the new connector is a 'remote on' for the aerial amplifier which I don't think I have as there was no associated cable on the old kit as it had a built in unit.

8 - Connect it all back up: BT aerial, MOST loop, 54-pin

9 - Test! Sit back in shock that it actually worked

10 - Re-assemble. - Close the unit's box, refit the carpet while clipping the seat power cable back in, put the door trim on (be careful not to break the clips!) and re-bolt the seat down.

11 - Enjoy your new bluetooth car kit.

It's a hoot with the SDS module, taking 5 minutes to dial a number Much quicker with the turney knob thingy or just use the phone to do it.

Still to do:

- Remove the old phone handset from the centre console.
- Fit some USB sockets in there to charge my phones so I don't have the cable trailing around.

Good guide, do you have any picture of the install or module and wiring etc ? How much was the Bluetooth box ?