My IS350 thinks it's RHD
My IS350 thinks it's RHD
Had to replace the navi screen and the PCB that sits behind it. Sourced parts from China but they looked identical to what I pulled out. Everything works great now, except that all my buttons are backward.
Climate thinks it's Map, passenger temp thinks it's driver temp, audio thinks it's destination, etc. It's hard to mess up the wiring as most of the connectors are ribbon cables. There was one 4 wire connector (red, green, and 2 blacks) between the PCB behind the screen and rest of the unit that I managed to pull the wires out of the back of the connector. Found some pictures and think I got it hooked back up correctly.
Any chance this is the cause or do you think this PCB is coded for RHD? Any other suggestions?
Climate thinks it's Map, passenger temp thinks it's driver temp, audio thinks it's destination, etc. It's hard to mess up the wiring as most of the connectors are ribbon cables. There was one 4 wire connector (red, green, and 2 blacks) between the PCB behind the screen and rest of the unit that I managed to pull the wires out of the back of the connector. Found some pictures and think I got it hooked back up correctly.
Any chance this is the cause or do you think this PCB is coded for RHD? Any other suggestions?
What exactly do you mean by the "PCB"? What was the issue you were having that called for needing the replacement parts? I'm in the middle of a "dead" NAV issue myself and have replaced the screen with a China unit too; but still no luck in my case.
^Well, if that's the case, I'd like to know what part on that board was failing so I'd know what to look for. It might be similar to my current NAV issue.
My issue started off as touchscreen. I attempted the repair and managed to cut through the ribbon connector - YEAH ME! Found a new display for $130 shipped. Started putting things back together but ended up destroying that PCB (printed control board) and had to order that ($50 shipped).
If you're having trouble getting your screen to come on, there could be an issue with the video/power connector running into that PCB. See attachment.
If you're having trouble getting your screen to come on, there could be an issue with the video/power connector running into that PCB. See attachment.
I think it's very likely the part is for RHD. Other than getting a new part, the only thing I can think of is test each connection wire in the ribbon that signals a button press and swap the wires -- but that might be very difficult to do.
Trending Topics
Trying to force close the connector of the ribbon cable. Snapped it right off the PCB and it pulled out the pads. Not repairable.
Just wish I knew for sure if it is the PCB. if not, it's either the wires I posted above or the wire connector behind the buttons. I've found lots of wiring schematics for connectors, but none that go into the depths of the display unit.
Just wish I knew for sure if it is the PCB. if not, it's either the wires I posted above or the wire connector behind the buttons. I've found lots of wiring schematics for connectors, but none that go into the depths of the display unit.
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Anybody know what ribbon or connector controls button presses? I got into the service menu and tested the buttons - definitely flipped.
There are 3 connectors that I can see. One is about 8 wires and connects to from the back of the hard buttons into the core of the unit. Two is a 4 wire connector that runs from the core unit into the PCB on the back of the display (see pic above). The third is a wide-ish ribbon cable from the core into the PCB.
There are 3 connectors that I can see. One is about 8 wires and connects to from the back of the hard buttons into the core of the unit. Two is a 4 wire connector that runs from the core unit into the PCB on the back of the display (see pic above). The third is a wide-ish ribbon cable from the core into the PCB.
