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No rear air - fault B1B70-88

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Old Aug 19, 2023 | 06:24 PM
  #1  
lr3-bb's Avatar
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Overlanding
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Default No rear air - fault B1B70-88

I have scoured the forum for a solution to my problem but no dice, so I'm posting here. My rear vents are not blowing any air, specifically the ones in the ceiling and the smol vents in the third row. It does not matter if I am in auto or rear control, for all temperatures, and for all vent locations. I have inspected fuse 51 in the glove box fuse box, fuse 22 in the engine fuse compartment, as well as R16. They are all fine. I have tried the distribution motor test/calibration multiple times, but I don't think it matters because of the fault I'm getting, B1B70-88 (2F) Local interconnection network bus circuit 2 - Bus signal/message failure - bus is off. Does anyone have experience with this issue, and if so, what was the solution? I noticed at this PDF: https://landroverforums.com/forum/at...is-testing.pdf that it can be a ground in this connector, though I'm really not sure which one that is.
 

Last edited by lr3-bb; Aug 19, 2023 at 07:10 PM.
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Old Aug 19, 2023 | 09:38 PM
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Did you pull the connector on the rear fan and test it directly?
 
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Old Aug 20, 2023 | 10:18 AM
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Is that connector located behind the climate controls in the center console?
 
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Old Aug 20, 2023 | 10:20 AM
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Why the hell would it be there? The rear HVAC module is in the REAR of the truck....
 
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Old Aug 20, 2023 | 10:54 AM
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Bruh what is your problem? You are like this in nearly every single reply to every single thread. I'm not sure why the mods put up with it. How can you get mad at someone for not knowing something they don't know?

Allow me to provide an answer that a mature, adult human might reply with:
"Ah, I see your confusion. I'm not referring to the connector plug (as referenced in the pdf you linked in your initial post, which explicitly says the issue is with a connector) which is plugged into the HVAC controls in the center dash, I'm referring to the actual fan connector plug which is in the rear of the vehicle."
See! It's not that hard! I'm really not sure why you are even on here since all you like to do is yell at people and tell them they are idiots. Firstly, I am obviously an idiot, I own a Land Rover, so there's no need to belabor the point. Secondly, caustic garbage like your condescending, overconfident replies isn't very constructive or helpful for people who are just trying to fix their trucks. If you aren't going to help don't bother posting, and you are going to berate confused people you can **** right off with that.
 

Last edited by lr3-bb; Aug 20, 2023 at 11:03 AM.
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Old Aug 20, 2023 | 11:04 AM
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Because I literally said connector on rear fan and "test directly". Nothing confusing at all about that at all. Good luck!
 

Last edited by DakotaTravler; Aug 20, 2023 at 11:16 AM.
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Old Aug 20, 2023 | 11:22 AM
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If you don't know where the rear fan is located or where the connector for that fan is, how could I know its location?
 
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