| ID | Status | Date | Year | Make | Model | Transmission Type | A/C Controls | Public/Private |
|---|---|---|---|---|---|---|---|---|
| #13218 | Closed | 2006 | Buick | Lacrosse cxs | public |
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I have a 06 Buick LaCrosse cxs that I’ve been chasing a electrical issue. When the car idles for about 45 min -1hr, the abs/brake/tc warning lights come on then the cluster goes dead (no warning lamp & gauges operating) while the car is running. If the vehicle is shut off, it won’t restart for 2-3 hrs. I’ve installed and programmed a reman engine computer from gm & the issue is still present. When the abs module is disconnected, the car is able to restart. I changed the abs module & the problem still persists. This time the cluster goes dead right away. I have a gm subscription & flashed all the modules available with updated software. I’m in need of assistance with diagnosing this issue. It is my belief something on the class 2 data bus line is causing the issue but I’m at a road block. Could u please provide assistance? I do have automotive background but not on GM vehicles. Thank you, Jim |
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Hopefully you have a scan tool capable of communicating with all modules on this vehicle. If so start by checking and recording all modules that are communicating while the vehicle is operating properly. Also record all codes. When the issues arise scan the vehicle again and see which modules are no longer communicating or are not present. Stored codes and identifying missing modules will give us a direction for further testing. Which engine is in your LaCrosse? Please see the attached data lines schematic. |
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This lacrosse has the 3.6L engine with 65k. I have a gm tech 2 & autel 908p that communicate with this car. I have an autologic, Mercedes star & gscan for other vehicles. I will get the codes & modules not present when the issue occurs tomorrow. Are you willing to assist with guidance and consulting on this exchange for a fee? Thank you, jim |
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Fees are good but I am actually looking for others to help with this site that can add diversity. If you have looked at my site with any depth you should realize that the information weighs heavily towards Domestic and Asian vehicles for North America, with a high percentage of GM information. The general goal is to have a more balanced representation of all makes, models, systems and continents. If you think you may have an interest in being part of this site moving forward let me know. In the meantime I am happy to lend my assistance. |
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I am more than happy and willing to be a part of site. My emphasis is on accurate diagnositic on all makes and models. At times I lack expertise on certain makes due to not having enough experience, however the only way to get experience is to be willing to take on a challenge that others don’t have desire to be challenged on. In the meantime, i will gather more in depth code & module information on this Buick LaCrosse & get back to you. What part of the country are you located in? |
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Glad to here you are interested. Looks like we share some of the same general philosophies in automotive diagnostics. I always have at least one bay occupied with a problem child vehicle that no one else can fix. Outside Charleston, SC |
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I thought I had you set up this morning with a dashboard to work with creating articles but there were some glitches that have to be taken care of first. Have you been able to come up with any data on the 06 LaCrosse? |
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After scanning the car in its normal state, it has codes in just about every module. A lot of the codes are redundant in the modules but the common ones are u1301 class 2 data link high, u1096 loss communication with instrument panel cluster control module, u1000 class 2 data link malfunction, u1064 lost communication with body multiple control system, and the list goes on! So I reset everything & will drive the car to see what happens. |
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I would pay particular attention to how many modules wind up setting loss of IPC communication codes. Any chance you have access to a tool like this https://store.snapon.com/Data-Bus-Fault-Finder-Fault-Finder-Data-Bus-P650977.aspx |
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After a short 10 minute drive, issue is back. Hvac module: Bcm: Instrument panel cluster: Electronic brake control module: Supplemental inflatable restraint: Digital radio receiver Radio: Where do I start? |
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I’ll get a hold of my snap on guy and get one. |
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What would be the best way to rule out the instrument cluster as the problem? |
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You don’t have to have that tool to do the testing but it does make it easier. As far as I know it is GM only so unless you plan on getting involved in a lot of GM communication problems you may want to work around it. You can of course disconnect one module at a time to see how the other systems are affected or use a jumper wire similar to the one I used in this article. https://sparkys-answers.com/2011/11/2005-chevrolet-tahoe-multiple.html If you make one up I would recommend longer and smaller gauge wires that what I used. I bought the Snap On tool after I had to fix compressed terminals in the splice pack. The splice pack for your vehicle SP205 is supposed to be clipped to the knee bolster panel to the right of the diagnostic connector. Since the ECM has already been replaced I would be focusing on the IPC, HVAC and Radio as the likely culprits. Don’t forget to reference the data lines diagram that I uploaded a few days ago. |
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Once you have a way to drop one leg of the splice pack at a time out of the data lines you can start separating each module at the splice pack. Referencing the wiring diagram you would disconnect one leg of your jumper wire from the gray wire at terminal G of the splice pack to isolate the IPC from the rest of the modules. . |