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code help b1087

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Old Dec 10, 2019 | 10:06 PM
  #11  
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Originally Posted by Josh Robins
I am getting this code after doing the power fold mirror swap. My rear passenger door will not open due to the line bus A code. Does anybody have any ideas on where to start to diagnose this?
If your talking about your rear passenger door window, it will not have anything to do with the Lin buss error. Its hard wired from the driver windows switches. Does the window open with the driver door switch for that window? Does it work on the rear door? Neither rear door work?
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Old Dec 10, 2019 | 10:09 PM
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Originally Posted by Gordy49913
If your talking about your rear passenger door window, it will not have anything to do with the Lin buss error. Its hard wired from the driver windows switches. Does the window open with the driver door switch for that window? Does it work on the rear door? Neither rear door work?
The rear passenger door will not open. The lock doesn't work. The window will go up and down. The Dtc listed above is in the PDM. I believe this is normal for a bad lin bus connection.
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Old Dec 11, 2019 | 12:43 AM
  #13  
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Originally Posted by Josh Robins
The rear passenger door will not open. The lock doesn't work. The window will go up and down. The Dtc listed above is in the PDM. I believe this is normal for a bad lin bus connection.
Without Forscan in front of me, I believe under the wrench icon, there is a option for Local Interconnect Network New Module Calibration I believe. Try to run that, your module may not be recognized by the network. I had to use that to have the rear camera recognized when I installed it.
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Old Dec 13, 2019 | 02:28 PM
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Originally Posted by Gordy49913
Without Forscan in front of me, I believe under the wrench icon, there is a option for Local Interconnect Network New Module Calibration I believe. Try to run that, your module may not be recognized by the network. I had to use that to have the rear camera recognized when I installed it.
I reset the modules in forscan and tried the new module calibration but it failed. I am wondering if I have a bad module or switch. I researched the code and it says it can shut down the rear corresponding door since they share the same dedicated line. I just don't know where to start.
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Old Dec 13, 2019 | 03:05 PM
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My 2016 WSM doesn't even show that code. I would still very carefully check the wiring harness and connectors. Make sure all the pins in the connectors are properly seated in the connector housings. That communications link is a simple one and there should not be much to check. This doesn't cost anything if you are doing the work yourself and would rule out the wiring.

When checking the connectors, disconnect the battery, then check the continuity of each circuit with a multimeter on the Ohm setting and by pushing the meter needle type probes in from the ends of the connectors where the wires go into each connector. I've seen it before that the pins all look good but there is a problem with how the wire is connected to the pin.
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Old Dec 13, 2019 | 03:07 PM
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Originally Posted by Josh Robins
I reset the modules in forscan and tried the new module calibration but it failed. I am wondering if I have a bad module or switch. I researched the code and it says it can shut down the rear corresponding door since they share the same dedicated line. I just don't know where to start.
Are those new modules or the originals? I don't think the lin circuit actually goes to the switch, its all through the modules. The switch just tells the module you want to do something.
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Old Dec 13, 2019 | 03:12 PM
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Originally Posted by Gordy49913
Are those new modules or the originals? I don't think the lin circuit actually goes to the switch, its all through the modules. The switch just tells the module you want to do something.
They are new modules. The code finder above says open or shorted window control switch. I just ordered a switch but I am wondering about the module now.
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Old Dec 13, 2019 | 03:14 PM
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Originally Posted by Gordy49913
Are those new modules or the originals? I don't think the lin circuit actually goes to the switch, its all through the modules. The switch just tells the module you want to do something.
I took both door panels off today and double checked all the connectors. I didn't see anything wrong.
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Old Dec 13, 2019 | 03:30 PM
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Originally Posted by Josh Robins
I took both door panels off today and double checked all the connectors. I didn't see anything wrong.
Did you look at the plugs and make sure the pins were seated in the plug. Occasionally when the pin gets inserted in the plug it doesn't click in, so when it gets plugged in a second time it pushes the pin back out. It doesn't take much for it to fail. The module has the right programming I assume, did you recheck that?
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Old Dec 13, 2019 | 03:36 PM
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Originally Posted by Gordy49913
Did you look at the plugs and make sure the pins were seated in the plug. Occasionally when the pin gets inserted in the plug it doesn't click in, so when it gets plugged in a second time it pushes the pin back out. It doesn't take much for it to fail. The module has the right programming I assume, did you recheck that?
The plug and lin pins appeared ok. I checked the programming a couple of times. They worked fine for about 2 days then stopped. That's what leads me to think it's the module or switch. I guess I could install the old module and see what happens.
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