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Old 01-12-2020, 05:58 PM #1
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2020 fuse box diagrams?
I'm looking for the "mayday" fuse in my 2020. It's not marked under the hood (there are two unmarked 10a fuses in there but neither one of them are it) and the previous year diagrams look completely different from what I have.
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Old 01-12-2020, 08:34 PM #2
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Did you check the fuse box on the driver side kick panel?
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Old 01-12-2020, 09:24 PM #3
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Originally Posted by Whippersnapper02 View Post
Did you check the fuse box on the driver side kick panel?
Not yet, no. In previous years it was under hood so that's where I went. I'll pull down the dash panel and check that at some point.

Interesting that it appears the 20s are totally different from an electrical architecture standpoint.
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Old 01-13-2020, 07:15 AM #4
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Following as well.
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Old 01-19-2020, 07:17 PM #5
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Here are what the 2020 fuse boxes look like. Unlike any diagram or pic I've seen from previous years and wherever that "mayday" fuse is, it's either hidden elsewhere or named something else these days. Bastards.
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2020 fuse box diagrams?-img_1108-1-jpg  2020 fuse box diagrams?-img_1109-1-jpg  2020 fuse box diagrams?-img_1110-1-jpg 
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Old 01-19-2020, 09:13 PM #6
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DCM fuse is what other Lexus vehicles had for telematics, give that one a a shot.

"DCM (Data Communication Module) Connected
Note Indicates the DCM is connected to the vehicle. The vehicle is able to communicate with mobile networks and/or the internet.
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Old 01-21-2020, 01:46 AM #7
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Quote:
Originally Posted by Superjet View Post
DCM fuse is what other Lexus vehicles had for telematics, give that one a a shot.

"DCM (Data Communication Module) Connected
Note Indicates the DCM is connected to the vehicle. The vehicle is able to communicate with mobile networks and/or the internet.
That makes perfect sense. There’s a DCM indicator and signal strength meter on the head unit. I’ll give that a try.
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Old 01-21-2020, 03:44 AM #8
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Yup. Ran into this different when trying to connect the DRL tap for my Morimoto LED Headlights. Wondering if the new head unit had something to do with it


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Old 01-21-2020, 10:15 AM #9
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Yup. Ran into this different when trying to connect the DRL tap for my Morimoto LED Headlights. Wondering if the new head unit had something to do with it


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There’s clearly a lot of stuff that’s new if it necessitated the complete redesign of the fuse layout. That means a lot of changes to the wiring harness etc as well. Not a small undertaking and seemingly odd for a vehicle model ostensibly near the end of its service life.

My thinking is it has more to do with the mandatory inclusion of the TSS-P systems than anything else. There’s a lot to the changes for 2020 plus vehicles.
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Old 01-21-2020, 11:57 AM #10
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Quote:
Originally Posted by jp.vegas View Post
There’s clearly a lot of stuff that’s new if it necessitated the complete redesign of the fuse layout. That means a lot of changes to the wiring harness etc as well. Not a small undertaking and seemingly odd for a vehicle model ostensibly near the end of its service life.

My thinking is it has more to do with the mandatory inclusion of the TSS-P systems than anything else. There’s a lot to the changes for 2020 plus vehicles.
Funny how they went through the trouble of rewiring the whole truck for that system, just to slap that big ugly sensor on the front of the grill like an afterthought.
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Old 01-21-2020, 09:56 PM #11
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Hah that's a good point.
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Old 01-26-2020, 01:37 AM #12
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Quote:
Originally Posted by Superjet View Post
DCM fuse is what other Lexus vehicles had for telematics, give that one a a shot.

"DCM (Data Communication Module) Connected
Note Indicates the DCM is connected to the vehicle. The vehicle is able to communicate with mobile networks and/or the internet.
Well, that did it. Data collection disabled. Shame that basically kills the useful bits in the remote control app too but not surprising and really a small price to pay.
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Old 01-26-2020, 06:17 AM #13
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Since where looking at this fuse box has anyone added the raptor running lights from running from tacos. They add there fuse in the fuse box but since the 2020 is different anyone know what fuse to use?
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Old 01-26-2020, 04:34 PM #14
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Anything that's ignition switched should work with an add-a-fuse under the hood (no room for add-a-fuse under the dash unless you ditch the cover). If you're following instructions that mention a specific fuse, you should be able to locate the same. Most of them should be named the same with the obvious exception of the old "mayday" fuse.
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Old 01-31-2020, 05:46 PM #15
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Does anyone have an idea on how to get a printable version of the 2020 under hood fuse diagram?
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