Gasso

Hi isnuts,

1.My car does not have factory sat nav so I am unsure about that, but it would be worth trying.

2. I am pretty sure the one I purchased is the first one. I bought it straight from that website from memory and installation was relatively straight forward. I believe the IS200 was not sold in the US, (or if it was, it was not the same as our model here), That is why they do not list the IS200 on their site.

Good luck,

Gasso

My car just has the stock amplifier (at the very left when you remove the glove box). It went straight in and works fine. I am not sure of the brand of amplifier.

Hi the Factory amp is located to the left of the heater box when you remove the glovebox. You can recognize it from the cooling fins. It is fiddly to remove.

I think (but am not sure) the unit in the boot is the navigation computer.

Ok If anyone else wishes to do the same as I have, here is how it works.

You need an interface between the new headunit and the factory amp. This unit is called a METRA TYTO-01 2003-08 TOYOTA JBL INTERFACE WIRE HARNESS. It plugs directly into your original plug, and sends the correct data down the TX+ and TX- wires, and also has a gain adjustment for varying your rca signal up or down to get the right level for your amp.

If you are going to connect other functions to the head unit, such as a dimmer for lights on, reverse camera etc, you will still need to splice wires into the harness.

If you use this interface you have no need to bypass the factory amp, or replace the rear speakers in order to install your aftermarket head unit. (you can have your cake and eat it).

The installation I have done gives just as superb sound quality from my aftermarket head unit as the original head unit, with all the extra functions you want these days in a Lexus.

Sure its as stock as can be. Apart from K&N air filter, Cruise Control, and aftermarket head unit(not quite working yet). Its my daily driver at the moment one day to become a toy but not for a few years.

Ok This link for 6 Speaker Diagram

IS200 6 Speaker

And 8 Speaker Diagram

is200 8 Speaker

Surely someone must know how to include factory amp in an aftermarket headunit installation. All wires I have connected, however I am just unable to switch the amp on using the HU amp power wire.

Anyone?

Hi I have been a member for ages but today is my first post. I have had my IS200 for a few years and have been very happy with it.

Hi there I Have the wiring diagrams for the 8 speaker and 6 speaker IS200. I would like to attach them they are PDF but i dont know how to attach?

I can see from the diagram that the 8 speaker system uses an rca amplifier. The 6 speaker diagram shows the wiring heading straight to the speakers from the head unit.

I am doing an aftermarket install head unit in the 8 speaker system and having difficulty finding out how to wire my speakers. I would like to continue using the factory amp if possible. Has anybody done this and who can give me some tips for the following.

Which pin ( or wire color) should I use to switch the amp on.

The wiring diagram shows two wires fromhead unit to amp TX+and TX-, anybody know what these are for?