Filename: Free 1998 BMW E36 18 Button OBC Conversion-Upgrade DIY pdf
Language: English
File : PDF
Size: Mb
1) OBJECTIVE
a) To replace the 11?Button OBC that came with my 1998.5 E36 M3 with an 18?Button OBC. This requires creating and routing a second wiring harness needed for the 18?Button OBC.
b) Disclaimer: This DIY worked fine for my vehicle. There may be slight differences between vehicles, but the basics should be similar.
2) REFERENCE
a) My car information
i) June 1998 build, AW/BLK
ii) Factory Options
(1) Power Sunroof
(2) Heated Seats
(3) LTW Forged Wheels
iii) BMW Installed Options
(1) Class III OEM Alarm
(2) Euro Headlights, turn signals, rear lights
b) Pelican Guest Technical Article – “BMW On?Board Computer Retrofit/Conversion”
i) http://www.pelicanparts.com/bmw/techarticles/E36?OBD_Convert/E36?OBD_Convert.htm
ii) Corrections: My install was different from this DIY…differences follow…
(1) X1071?Pin4 (brown/red) routes to the OBC Turn Signal Stalk. The Pelican DIY says to route and tap into the brown/red wire of the OBC Turn Stalk Harness. This was not the case in my install, as the brown/red wire did not cycle the 18OBC. There is a brown/red wire in the OBC Turn Stalk Harness, but it goes to the connector for the slip ring/steering wheel. The OBC Turn signal has one more wire in the harness that the regular turn signal does not have….it is a YELLOW/RED wire. This is the wire I used to make the 18OBC cycle through the functions. As a note, the correct wire can be found by following the two black wires at the base of the stalk to two solder points. One of those wires will make the obc cycle and the other is probably ground (brown). Lars told me that the OBC will cycle when the Pin4 wire gets grounded.
(2) X1071?Pin6 (black/white) routes to the X16 instrument cluster connector. The Pelican DIY says to route this wire to the X16 connector and plug it into the empty X16?Pin21. In my case, Pin21 was not empty. As a result, I just tapped into the existing black/white wire.
(3) X1071?Pin9 (white/gray) routes to the X17 instrument cluster connector. The Pelican DIY says to route this Pin9 wire to the X17 harness and tap into the white/gray wire. In my case, the white/gray wire was missing and the corresponding slot in the X17 connector was empty. As a result, I just spliced a pin to the X1071?Pin9 wire and plugged it into empty the X17?Pin10 location.
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