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Old 12-21-2020, 12:33 AM #406
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Quote:
Originally Posted by Saker View Post
So after reading post #55 @ElectroBoy I decide to order a 89121-30020.
Will see if this will work or not!
Out of curiosity, any luck in finding this sensor for cheap?

*regarding the tabs, I think earlier in this thread the recommendation was to use electrical tape so they don't lock. But if it works, not sure you would ever have to remove the thing ever again.
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Old 12-21-2020, 01:14 AM #407
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Quote:
Originally Posted by Espresso_OI View Post
Out of curiosity, any luck in finding this sensor for cheap?

*regarding the tabs, I think earlier in this thread the recommendation was to use electrical tape so they don't lock. But if it works, not sure you would ever have to remove the thing ever again.
Got mine from fleabay and works great on my 2018 ORP
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Old 12-21-2020, 02:55 AM #408
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Quote:
Originally Posted by Espresso_OI View Post
Out of curiosity, any luck in finding this sensor for cheap?

*regarding the tabs, I think earlier in this thread the recommendation was to use electrical tape so they don't lock. But if it works, not sure you would ever have to remove the thing ever again.
Yes, the sensors are very low tech, if they work from the start thereís not much that can go wrong.

The tape method seems like a good idea to pull back those tabs a little. Or maybe twist a wire around them, in case the tape softens up on the hot dash and the tabs break through and latch tight. Or trim the tabs in a way that they only grip a little. Or trim all of the tab contact area away and rely on a small dab of a low strength adhesive to hold the sensor in place.

@Saker , please let us know what you discover. I wish Iíd done something to the tabs to make future removal possible. I just tested it then snapped it into place.
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Old 12-21-2020, 11:46 AM #409
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Quote:
Originally Posted by ElectroBoy View Post
Yes, the sensors are very low tech, if they work from the start thereís not much that can go wrong.

The tape method seems like a good idea to pull back those tabs a little. Or maybe twist a wire around them, in case the tape softens up on the hot dash and the tabs break through and latch tight. Or trim the tabs in a way that they only grip a little. Or trim all of the tab contact area away and rely on a small dab of a low strength adhesive to hold the sensor in place.

@Saker , please let us know what you discover. I wish Iíd done something to the tabs to make future removal possible. I just tested it then snapped it into place.
@ElectroBoy

I took photos of the connection yesterday and it was the white 8 pin connector. When I get the sensor in, test it, Iíll report my findings.
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Old 12-27-2020, 03:14 PM #410
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dont work on mine??

i put the sensor in a 18 sr5p and it works no different than without it. When i turn on the nav and then the lights, it dims with or without the sensor. i was hoping it would dim the rear camera, i put led backup lights in and now the dash is to bright at night backing up. it made no difference in the radio panel also. i dont usually drive with the nav screen.

Last edited by rlporter507; 12-27-2020 at 03:15 PM. Reason: add to
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Old 12-27-2020, 04:48 PM #411
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Quote:
Originally Posted by rlporter507 View Post
i put the sensor in a 18 sr5p and it works no different than without it. When i turn on the nav and then the lights, it dims with or without the sensor. i was hoping it would dim the rear camera, i put led backup lights in and now the dash is to bright at night backing up. it made no difference in the radio panel also. i dont usually drive with the nav screen.
You should have a brightness adjustment for both of those screens aside from the sensor.
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Old 12-28-2020, 03:23 PM #412
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@ElectroBoy

So here are my findings:
The sensor only has 3 pins.
I tested it and it works as you describe in post #55!

Confirm my part # with photos.



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Old 12-28-2020, 03:58 PM #413
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Quote:
Originally Posted by Saker View Post
I tested it and it works as you describe in post #55!
Nice - and thank you for the confirmation! Any luck finding it below $50? Even on Ebay that part # isn't cheap
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Old 12-28-2020, 04:14 PM #414
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Quote:
Originally Posted by Espresso_OI View Post
Nice - and thank you for the confirmation! Any luck finding it below $50? Even on Ebay that part # isn't cheap
No, I think it was 80+.
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Old 12-28-2020, 04:18 PM #415
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BTW, I cut the upper part of the retaining clips that locks the sensor in.
So, it is held in by the clip pressure only.
If I wanted to remove it, Iím sure I could just pry it up and out!
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Old 12-28-2020, 06:02 PM #416
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Quote:
Originally Posted by Saker View Post
BTW, I cut the upper part of the retaining clips that locks the sensor in.
So, it is held in by the clip pressure only.
If I wanted to remove it, Iím sure I could just pry it up and out!
Good job, mon. So it looks like itís a 4-pin connector but only 3 pins are populated.
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Old 12-28-2020, 06:40 PM #417
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Quote:
Originally Posted by rlporter507 View Post
i put the sensor in a 18 sr5p and it works no different than without it. When i turn on the nav and then the lights, it dims with or without the sensor. i was hoping it would dim the rear camera, i put led backup lights in and now the dash is to bright at night backing up. it made no difference in the radio panel also. i dont usually drive with the nav screen.
In a previous post by @xyzzy he posted a summary chart of which models will work with the light detectors. It doesn’t work in your 18SRP. Most likely because the harness wires are not connected.

https://www.toyota-4runner.org/3566171-post383.html

In an early post of this thread it was discovered that some models have the wires in the connector plug but they actually don’t terminate anywhere on the other end. For these models there was a solution described and designed by @Old Red where wires were added to connect to the MPX Body ECU and enable the light sensing/dash dimming function. Unfortunately a lot of his posts got deleted from this forum and I can’t find them. Maybe someone who has done this repair can chime in if they still have the instructions.
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Old 04-02-2021, 05:13 PM #418
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Quick update,
I ordered a used 89121-30020 on eBay for $52 and installed it on my 2021 SR5 and it is working just like I understand that it should. I will test it more over the next few days as I try different driving scenarios such as driving at night and driving into dim parking structures but so far I can get the nav screen to dim by simply putting my hand over the light sensor.

I have not made any Entune menu settings like described in post #55 by @ElectroBoy yet, it seems that my menu is a bit different.

Thanks to all that have contributed to this thread, no more blinding nav screen when I start the vehicle at night.
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Old 04-12-2021, 07:14 PM #419
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Apparently, I failed and didn't read enough of the tread to learn that I needed a different part for my '21 ORP.

So - I have the pre-2020 fitment purchased from eBay if someone wants one. HMU if you want the 89121-50020 for $15 shipped.
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