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Q. Why does my Harman Kardon stereo increase and decrease volume automatically and can I adjust it?
A. The Harman Kardon head units are set to dynamically adjust the volume at certain speeds to compensate for engine, road, and wind noise. The amount of automatic volume adjustment can be controlled by modifying the head unit's default settings. To do this, start with a unit that is off, then turn it on and hold the 'm' button (approximately 10 seconds) until the display shows the head unit's serial number. Use the '<' and '>' keys to navigate through the options and look for "GAL 1-6." Now select the radio buttons '1' through '6' for the desired setting ('1' produces a negligible volume shift and '6' produces a dramatic volume shift). Note that this also works for the BMW business radio in most M3s.
Q. What is the whirring noise I hear from the center of the dashboard after I turn off my car?
A. The noise is normal and it is the operation of the interior temperature sensor fan.
Q. What are the pin and wire assignments for the connectors on the OEM stereo amplifier?
A. Below are the pin numbers, wire colors, and their functions for the two connectors on the ten speaker stereo amplifier (Harman Kardon system included). They are valid for all E36 vehicles made from 9/95 to the present.
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Connector X605 Pin #1 power from fuse #9 (red/white) Pin #2 antenna amplifier input (white) Pin #3 ground Pin #5 (+) to right rear low range speaker (blue/violet) Pin #6 (-) to right rear low range speaker (blue/gray) Pin #7 (+) to left front low range speaker (blue/white) Pin #8 (-) to left front low range speaker (blue/brown) Pin #9 (+) to right front low range speaker (blue/red) Pin #10 (-) to right front low range speaker (blue/brown) Pin #11 (+) to left rear low range speaker (yellow/gray) Pin #12 (-) to left rear low range speaker (yellow/black) |
Connector X606 Pin #1 right rear (-) output from radio (brown/orange) Pin #2 right rear (+) output from radio (blue/black) Pin #3 left rear (+) output from radio (yellow/black) Pin #4 left rear (-) output from radio (brown/orange) Pin #8 (+) to right front mid range speaker (blue/white) Pin #9 (-) to right front mid range speaker (blue/brown) Pin #10 (+) to left rear high range speaker (yellow/violet) Pin #11 (-) to left rear high range speaker (yellow/gray) Pin #12 (+) to right rear high range speaker (blue/black) Pin #13 (-) to right rear high range speaker (blue/gray) Pin #14 right front (-) output from radio (brown/orange) Pin #15 right front (+) output from radio (blue/red) Pin #16 left front (+) output from radio (yellow/red) Pin #17 left front (-) output from radio (brown/orange) Pin #21 (+) to left front high range speaker (yellow/green) Pin #22 (-) to left front high range speaker (yellow/brown) Pin #23 (+) to right front high range speaker (blue/gray) Pin #24 (-) to right front high range speaker (blue/brown) Pin #25 (+) to Left front mid range speaker (yellow/white) Pin #26 (-) to left front mid range speaker (yellow/brown) |
Q. What hidden functions are available for the on-board computer (OBC)?
A. The OBC has quite a few hidden parameters that are both informative and configurable. However, do not change any of the parameters unless you are absolutely sure of what you are doing (write them down). Detailed information can be found at the Unofficial BMW website at http://www.unofficialbmw.com/all/electrical/all_obc_secret_codes.html.