remote start, 2007 camry
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=107969
Printed Date: July 03, 2025 at 11:50 AM
Topic: remote start, 2007 camry
Posted By: kintosol
Subject: remote start, 2007 camry
Date Posted: October 06, 2008 at 8:37 PM
Hi, Today I tried installing Viper 579XV RS with DEI bypass module 556u on a '07 Camry and I'm unsure where the blue wire from bypass gets conected to -manual says it should be connected to status output from remote start, but once again I'm unsure what wire is this- I will be using my valet key. Can I bypass transponder without using a DEI 556U module? I have seen some shops using just what looks like a diode to bypass transponder. Thank you in advance for all your assistance. ------------- Kintosol
Replies:
Posted By: howie ll
Date Posted: October 07, 2008 at 5:30 AM
Blue wire from alarm marked "status output" which should be obvious. You will also need to connect this to the key sense wire which is if I remember a BLACK / YELLOW coming from a plug on the ignition barrel and this wire goes to ground when the key is inserted. Your tach is either a black with silver dots on the OBD II socket under dash, one of the injector port wires, not the common colour or on some Toyota/ Lexus there is a black box on one of the wheel arches, inside is a RED / black (?) loop, it's the only one like it. Sorry I can't be more precise but this vehicle like the Maxxima has been off the UK market for some years, murdered by too many BMWs ,Audis and M/B. I've based this on previous Toyota/Lexus knowledge because they are generally pretty logical and don't change their circuits or colour codes without reason.
Posted By: howie ll
Date Posted: October 07, 2008 at 5:44 AM
Just looked at the diagramme, that blue wire is on the satt. loom you wil have to break out the cable from the loom and join to the key sense and the 556U using diodes on each line with the bands pointing towards the join part. Use 1n4004 or upwards. The by-pass via a "diode" is actually a resistor and it refers to GM pass-locks used in the 90s.
Posted By: Mike M2
Date Posted: October 07, 2008 at 6:17 AM
You really only need to diode the keysense wire, not both, band towards the RS....
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Mike M2
Tech Manager
CS Dealer Services
Posted By: howie ll
Date Posted: October 07, 2008 at 7:30 AM
Of course you're right Mike, I didn't think it through.
Posted By: kgerry
Date Posted: October 07, 2008 at 9:54 AM
i have never hooked up keysense for a 556U on a Toyota and i've done a couple hundred with no issues.... toyotas and Lexi are not fussy about seeing 2 keys... you do need to hook up 2nd Status to keysense on the car to shut down the OEM alarm... but you needn't worry about keysense on the 556U....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: kintosol
Date Posted: October 07, 2008 at 12:25 PM
Is there a way to test if the BLACK / YELLOW wire is key sense wire, or can some one confirm is this wire is the correct one. I just do not want to mess something up in my car. Thank you guys for your input, I really appreciate it!
Posted By: howie ll
Date Posted: October 07, 2008 at 12:52 PM
I hate to say this but if you don't know how to test a wire that goes to ground you shouldn't even be attempting this job, thank goodness for liability waivers. Take a DMM preferentially one with a continuity buzzer. Place one terminal to ground and placing meter's range to either low ohms or continuity, place other end to cable plug at end of lead coming from ign. switch barrel this plug should be 2 or 3 way. insert key. The correct lead will buzz or show under 1ohm when key inserted. Old school method... take one Snap-On or similar bulb test lead, hook croc clip onto 12V perm, probe with other end, surprise surprise if lead is correct tester light will glow when key in if you have correct lead. For your future reference, even when we know what to look for, pros test beforehand and that saves you time heartache and money.
Posted By: Chris Luongo
Date Posted: October 07, 2008 at 2:24 PM
1. I strongly agree with howie II. If you're not equipped to test every wire in the car before making a connection to it, you're not ready to be doing installations yet.
2. What trimline of Camry is it? Only the XLE has a factory alarm. No need for keysense on CE, LE, or SE.
3. Have you looked through the Viper's install manual? There is a wire in there labeled "status." It's either blue or blue/black, I always forget.
4. The 556U consists of simply a relay(s), plastic casing, and wire. It's possible to make your own bypass with a spare key, scrap wire, electrical tape, and a relay. But if you've already bought the 556U (and can't return it), it's easier to just use what you have.
Posted By: kintosol
Date Posted: October 07, 2008 at 10:45 PM
I have done other rs/security system installs, but never had the opportunity to use a bypass module, that's why I'm a little confused...Anyways the car I'm working on is a '07 Camry LE... I 've checked the installation guide and yes the status wire in the brain of the main unit is blue. Thank you all for your feedback, it has been very helpful! ------------- Kintosol
Posted By: KarTuneMan
Date Posted: October 07, 2008 at 11:08 PM
Keysence is blue, on a white 2 wire plug at the key switch... it's negative. If you trigger this while under remote start condition, it will disarm, without unlocking. Diode isolate the "status" out wire to the key sence, and the bypass module. -------------
Posted By: Mike M2
Date Posted: October 08, 2008 at 6:31 AM
As Chris stated earlier, the LE doesn't have an alarm so keysense just isn't needed....
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Mike M2
Tech Manager
CS Dealer Services
Posted By: KarTuneMan
Date Posted: October 08, 2008 at 7:58 AM
Well boys, it does... (or can) my folks drive one!
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Posted By: kintosol
Date Posted: October 08, 2008 at 10:15 AM
My Camry does not have a factory security system, so I guess I do not need to connect keysense. As I said before, thanks a bunch for your comments!
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Kintosol
Posted By: howie ll
Date Posted: October 08, 2008 at 12:03 PM
Ha I just did a VW Polo 5 door using a different method, only 3 diodes instead of 11, aren't I wonderful?
Posted By: kintosol
Date Posted: October 08, 2008 at 7:41 PM
how did you accomplished it?
Posted By: KarTuneMan
Date Posted: October 08, 2008 at 7:49 PM
Do tell Howie..... do tell !  -------------
Posted By: Chris Luongo
Date Posted: October 08, 2008 at 7:49 PM
kintosol,
You're welcome, and good luck on this Camry.
If you've never dealt with a transponder bypass before, here are your two basic things:
1. Get the remote start to work successfully while you have one of your good keys sitting in the ignition switch (but in the off position).
That way, you know the rest of your install is correct already.
2. You'll see that the ring with that 556U is rather large, so it can fit around big key cylinders (some Nissans, for example).
For your car, the ring needs to be made smaller (use a small zip tie or a piece of tape), and placed right on the front of the receiver on your car.
So, you've got the steering column cover off, right? See that white plastic part around the keyhole, that lights up with the door open?
The ring from the 556U has to be made that same size, and sitting right on the "ledge" (flat area) of that clearish-white plastic light-up thingy.
Basically, you should be making the ring as small as you can, without having it show after you have the car back together. If it's not just like that, it won't work.
Posted By: kintosol
Date Posted: October 08, 2008 at 11:21 PM
Chris, I have everything hook up except the 556U bypass module and by following your advise, if I put the key in the ignition cylinder the car starts, so I can say everything is OK. I just need to get some diodes to finish this installation, hopefully I will have it ready by this weekend. I just can't thank you enough guys for your advise!
Posted By: Chris Luongo
Date Posted: October 09, 2008 at 1:53 PM
You're welcome, but what do you need diodes for?
Your car isn't an XLE, is it?
You just need:
556U red to constant power
556U black to chassis ground
556U blue to ground-when-running (DEI calls "status") from remote start.
All other 556U wires, don't connect to anything.
(I usually just tie the 556U's blue and black wires together, and put them both to the status wire from the remote start..........it still works fine and saves a tiny bit of time.....but you don't really have to do that.)
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