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Electronic Compass Module


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Mike, I think you want the <BR>compass module. If the wires<BR>and connectors are there then<BR>just plug in the module.<BR>Then go to service mode and <BR>program the compass into the <BR>computer.

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Guest Stan Leslie

I think most people will assume that ECM stands for Engine Control Module instead of Electronic Compass Module (which the Reatta didn't have)

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I am just going by what is written in the service manual and it describes the Electronic Compass Module. I have brought up the screens and it is not listed but described in the manual????

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I got mine from the dealer.<BR>Just say it's for a Riv.<BR>I had to hard wire mine into<BR>the harness under the dash.<BR>on the Reattas the plug in<BR>connector is not there.

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You owners that are experimenting with these things need to document what you needed to do to change something or install something and send it to Stan Leslie or myself.<P>There is a strong possibility that the Reatta Division web page will have the ability to list these changes/fixes and show pictures and schematics. Be the first on your block to get your name in lights when that happens.

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According to the parts book the compass module part number is 1647056.<BR> <A HREF="http://www.gmpartsdirect.com" TARGET=_blank>www.gmpartsdirect.com</A> show it at $222.36 retail, $133.42 their price...plus s&h.<P>I don't know what else you need...would be best to find a Riviera with one and get the module and wiring harness.

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It's a compass, so it errr.. tells you what direction you are facing. The reason that I must have it is that it gives you an additional screen with a cheesey graphic of a car at an intersection with the direction you are heading written across the sky, and the directions to your left and right displayed on little road signs. I've been wanting to add one on since I got my Reatta, but was unaware that the compass module was still available. As soon as Turbo tells us how he tied his in, I'm ordering one. smile.gif" border="0

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I just reprogrammed the computer to show the compass display in the options menu.<BR> <BR>1.)Get into diagnostic mode by pushing the climate control warm and off buttons simultainously. <P>2.)Select BCM then BCM override.<BR> <BR>3.)Select BS07.<P>4.)Remember this displayed number so you can return the BCM programming to normal.<P>5.)Push override up arrow until code 252 is displayed.<P>6.)To permantly store the new option code: Press and simultaniously hold for more than 3 seconds the GAUGES and OPTIONS buttons surrounding the display.<P>7.)Turn the key off and then back on.<P>8.)Select the OPTIONS button surrounding the display.<P>9.)Compass should appear in the menu. All of the old options are still there but located under a different level.<P>10.)Smile

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I have not done this, so procede at your own risk. I will not take any responsibility for accuracy or for problems arising from this information.<P>Compass Module: <BR>Pin# <P>1 Data Line<BR>2 Data Line<BR>3 Central Power Supply pin# D16 +7 Volt<BR>4 Central Power Supply pin# D7 7 Volt Ground<P>Probably the easiest place to find the Data Line is at the ALDL connector pins M and L. The pins go to tan colored wires. Pins M and L are shorted together by a metal pin in the ALDL connector cover. The data line is daisey chained. Removing the cover will break the chain. The line can be broken almost anywhere to insert the compass module. Minimum distances may be required from other devices on the chain. May not work correctly if installed to close on the chain to another device.

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Hi,<BR>We have an 1988, and am interested in installing the ECM, are there wiring diagrams available?<BR>where and how much does one pay for such a module?<BR>I used to have a 1992 Olds Toro-Trofeo which had a compass and had a Color TV screen.<BR>hmm..I wonder if the ECM used is the same in all the GM vehicles...

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