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Passenger window switch doesn't work on driver's side window assembly

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by spyderr911, Nov 24, 2024 at 5:13 PM.

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  1. spyderr911

    spyderr911 Junior Member

    Joined:
    Feb 1, 2020
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    Location:
    Orlando
    Vehicle:
    2011 Prius
    Model:
    Four
    I'm hoping someone else has had a similar issue and can give me some starting points of troubleshooting this problem.

    Before I describe the issue and what I've tried so far, I must say this issue happened right after a major 2-day rainstorm where the 2011 4-door Prius stayed in the driveway getting soaked (BUT not flooded).

    So as the title says, the passenger window does not work from the driver's side master window assembly. All other windows work fine from the driver's side assembly. And the passenger window switch DOES work from the passenger side normally.

    I assumed it was the passenger switch in the driver assembly so instead of wasting time troubleshooting wires and circuit boards and switches, I decided to replace the whole assembly with a brand new one. Well as you may have guessed this did not fix it. So I can eliminate the entire assembly on the driver side now, but now I'm stuck.

    Any ideas? Is there some obvious connection points I can check for corrosion some where? Is there some simple continuity tests I can try with my multimeter on some wires or connectors?

    I use the driver and passenger window quite often so I'm hoping someone can lead me down the right path. Thanks in advance!
     
    #1 spyderr911, Nov 24, 2024 at 5:13 PM
  2. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
    440
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    From what I can tell the LIN wire from the master switch assembly is what tells the other window motors what to do. Since the other windows all work from the master switch assembly I'd be most interested in checking out connections from pin 45 on connector 3B to the LIN (pin 9) of the front RH window motor assembly. I assume the window motor assembly is in the door and if you think it's rain related that might be a good place to start. I'd also want to check the ground (pin1) at the motor assembly because there might be a scenario where the ground is bad from there there (to NL2 pin4), but the door switch ground is still OK. So yeah, I guess the front RH window regulator motor assembly is where I'd start (unless I found out those other connectors are easy to get to), maybe even just a visual inspection might give some clues. powerwindows2.JPG powerwindows1.JPG
     
    #2 Eddie25, Nov 25, 2024 at 12:33 AM
  3. Eddie25

    Eddie25 Active Member

    Joined:
    Dec 31, 2018
    440
    178
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    Location:
    IL
    Vehicle:
    2011 Prius
    Model:
    III
    I'd unplug N2, which is the front RH motor assembly connector and (after visual inspection) check resistance from pin 1 to ground, and from pin 9 (LIN) to any other easy LIN line connection (which might be pin 17 on O6, the master switch assembly connector). You might want to also use a test light for the ground check. If both those check out... I think I'm just calling the front RH motor assembly. I can't bring myself to imagine anything else. If I was a betting man I'd go with the motor assembly, I'm a terrible bettor though.
    power window 3.JPG
     
    #3 Eddie25, Nov 25, 2024 at 1:06 AM
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