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Install Garage & Help Desk You've got the radio, now which cable goes where? Got questions about factory installed radios in your car? Ask any installation or help questions here and someone will get to you soon.

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Old 09-12-2003, 06:27 AM   #1
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Default Auxiliary input adapter for Toyota/Lexus?

I'm new here and I've done some reading, but haven't found what I need. I'm trying to find a way to install a Sirius system directly using an AUX Input instead of FM modulation. Does anyone know of an auxiliary input adapter made for the Lexus RX300 w/Pioneer systems?

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Old 09-12-2003, 09:59 AM   #2
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Welcome to SiriusBackstage jeremyp!!

Have you tried checking Soundgate or PIE for and Aux adapter for your vehicle? They have one for most new vehicles. I'd try looking at their adapters first.
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Old 09-12-2003, 09:18 PM   #3
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Thanks for the information. I called both Soundgate and PIE, but they don't make one. I did find one from Blitzsafe, but it won't allow me to use my existing CD changer.

Any other companies out there that might make one?
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Old 09-18-2003, 03:33 PM   #4
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I have a Lexus, too, and you might find out some more info on - they have a Electronics forum that might be of help.
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Old 09-20-2003, 02:53 AM   #5
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Well you say you have a factory changer---more than likely this is a good thing. My best sugestion is to try to mod the changer cable for you factory changer to allow for an aux input. Most cd changers (w the exception of fiber optic Mercedes units) use a standard low lever output....thing of it as an rca output. On lets say an 8 pin changer cable three of your 8 pins are going to be left audio out, right audio out and common ground----the others are going to be power, ground, control wire etc. The tough part of your install is going to be finding out what three wires are your audio signal wires---these though usually stand out as a shielded set of wires. (theres enough different lexus forums that identifying the wires should be easy--someone can probably give you exact color and pin combos) The mod requires three relays. One relay for the left signal, one for the common ground and one for the right audio. Once you identify your three wires you will need to cut all three in half. What you are going to do is wire the relays so that 85 is ground, 86 is 12volts wired up to a toggle switch (to switch from cd to aux in) For each wire (left, right, signal ground) you are going to wire the wire going to the input of the factory headunit to 30 (remember one relay for each of the three wires) The output wires from the factory changer will go to 87a , and the output wires from your sirius device (rca output) will go be wired to 87. (I may have 87 and 87a backwards..its late ) To put this into perspective here is how its going to work. In order to listen to whatever is on your aux input device you will have to be in the cd changer mode. When your switch is off the relays will act as a pass through and you will hear the cd changer like normal...when you want to listen to sirius flip the switch and the relays will interupt the signal from the changer and then input the output of your sirius device to the factory radio-----the cd will continue to play and it will display as so on the factory radio but instead of hearing your changer you will hear the aux unit. Key factor is that you will have to be in cdchanger mode------I have not personally done this in a lexus to see if it will work..but it works fine on gms w/ seperate tape/cd player and in theory should work on any unit with a seperate changer or tape player. Let me know if you have any questions and sorry about the long post.
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Old 09-20-2003, 11:08 PM   #6
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There's a company called Ventura that makes adapters. Unforfuntaley, I'm not sure if they're available. Here's their part number for Toyotas
VT-TOYSIRKEN-01 (about $99) and it should have a 12 pin connection behind the headunit in order to work properly, it'll should recognize it as a CD changer. you can maybe try
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Old 09-25-2003, 09:47 PM   #7
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Default Look at this...

If your CD changer isn't built into the radio, you can probably find an adapter. Pacific Audio specializes in this, but the closest I could find for a Lexus is the link above. You could call or e-mail them to see if they support your radio.

I gave up on my 2003 Toyota Matrix Delco HU and sprang for a new unit with AUX input. If you have to go that route, you won't be sorry. It sounds great!
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