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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sun, Feb-24-2008, 05:32:50 AM   #1
derekw
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Default OBDII to BMW 20-pin connector adapter?

I have a 99 M3, and I have a generic OBDII code reader (gets much more use on my Tahoe...). I hooked it up to the M3 today (to the connector near the pedals) to check an SRS light that came on, but I can only access codes and information related to the engine or transmission.

I did some checking, and the SRS code/reset tool that Peake sells connects to the 20-pin underhood connector (and apparently, for the cars with both the OBDII connector under the dash and the 20-pin underhood connector, you must use their tool with the 20-pin underhood connector to access the SRS codes or to reset the light).

Some vendors sell a OBDII connector-to-20-pin underhood connector adapter, which would allow me to hook the code reader I have to the underhood connector. Does anyone know if this will let me use my code reader tool to check the SRS codes?

Thanks
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Old Sun, Feb-24-2008, 05:39:24 AM   #2
phantom3
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http://www.peakeresearch.com/srstool.htm . Buy the SRS specific one (pick the adapter you want)
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Old Sun, Feb-24-2008, 07:26:34 PM   #3
derekw
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Thanks, but I'm just hoping I can get away with a $15 adapter instead of a $130 tool
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Old Tue, Feb-26-2008, 12:00:44 AM   #4
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Any other thoughts?
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Old Sun, Mar-09-2008, 04:02:18 AM   #5
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Default Cable, BMW 20M to J1962F, 1ft

These people sell a Cable, BMW 20M to J1962F, 1ft for $ 25.00 bucks plus shipping. It is not on their website yet becaue it is a new product:

http://www.carplugs.com/

Ask them by email before and they will sell you this cable.

Check on their website the contact email address.

I forgot it,

Intravino
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Old Sun, Mar-09-2008, 03:11:58 PM   #6
PhYrE
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The 20-pin port will not give you any more pins than at the dash with a generic reader.

You need something that is designed for the 20-pin connectors to read them. BMW has some additional wires on other pins for the ODBII connector that provide more to under the dash, and of course have more pins on the 20-pin connector.

As a side note, make sure that the cap is on for the 20pin port, as removing it disabled the ODBII port in the car.

Basically you need the SRS tool or a knockoff or official BMW reader. As with most carmakers, they use proprietary systems and put as little as possible on the ODBII channels.

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Discussing OBDII to BMW 20-pin connector adapter? in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)