Grom unit has no support for Gen 1. This one was bought from malaysia. The facebook page name is JP car audio & electronics. This works both on apple car play and android auto.
The seller gave me instruction on the configuration. But there is no need to configure anything. The rest are plug and play except for the grounding needed to do which i mentioned further in this post.
The actual dismantling of the car panels and installation was not provided by the seller. Luckily, the beat sonic ct200h installation was available in youtube. I used it as a guide when installing the car play unit because they have explained clearly on what tools you need, no. of screws to remove and how to carefully take off the panels.
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The only instruction the seller gave is where to connect the wires provided
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There is an excess cable in the package that was meant to fit the latest gens of the navi and other lexus brands. This is for the display bypass. But since i have the first gen navi (2011-2012ish), the cable below was not necessary.
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One thing you needed to do is to buy an aux cable because the carplay sound is dependent on aux (no need to plug the other end of the aux to your phone). Once you plug the aux in the port and activated, there is no need set it up again in audio in the oem system. It will automatically sound up once the carplay pop up in the oem display. Also, remove the bluetooth pairing on the oem system and on your phone so your bluetooth connection will only focus on carplay. You can use other 3.5mm jack but you need to ground it up.
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One thing i’ve noticed that there are static noises and the carplay sound quality is really bad. I tried to diagnose if my aux port was messed up but it was not. But i figured it out that the aux cable just need some grounding and fixed the problem. The other end of the aux cable should be connected to any ground. I tried to ground it in the carplay unit ground wires and it worked. But any ground point should be okay.
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I placed the unit behind the glove box as shown in the video by the beat sonic guys
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After installing this unit, the only downside was the steering wheel controls. The volume function is working, the rest is not. Im still communicating with the seller for any fix available.
Overall, the experience was really satisfying with the carplay unit. Every time i get inside the vehicle with the phone inside my pocket, it connects automatically and wirelessly. Carplay will also automatically pops up in the display without any inputs from me. Just need about 20-30 seconds to load after starting the car. Oem reverse camera got a little bit of delay of few seconds when you are in carplay mode.
I’m just an average diy-er and installing this kind is an achievement. I just want carplay and it happily delivered my expectations.
Tools and other stuff needed:
Screwdiver
10mm socket
Plastic trim remover
Wire stripper for the ground
Aux cable (1m length should be more than enough)