Toyota Matrix Remote Start and Alarm

Hi everyone, I am planning on installing a security / remote start combo on a 2006 Toyota Matrix.  Im planning on the Clifford RSX 3.5 or Compustar 2W900FM AS and have a few questions.

My main question is the KEYSENSE wire.  I have read the wiring diagram (avaliable on this site) and it sound like this wire needs to be grounded using the Ground while running from the remote start unit in order to disable the factory security system.  Now I have also read about some units on bypasskit.com and there are some kits with Keysense wire becasue they say that these Immobolizer bypass module will shut off as soon as a key is inserted in the ignition.  The purpose of this is so that the car does not detect 2 keys, the one I insert and the one from the bypass.  Could anyone tell me if really need a bypass with keysense shut off, I think not because would this not be the same as me having 2 keys on the same keychain (really close together) and starting the car?  And is my assumption of grounding this wire only during remote starting correct?

My other question is regards about the Keyless entry and power door lock.  For both the Compustar and Clifford unit they say it has driver door priority yet both install manuals dont explain how it operates.  Either unit has Double pulse unlock feature which can be enable, and both have a single wire which can be selected to be + Unlock / - Lock  or  - Unlock / + Lock.  The Matrix according to the wiring diagram requires - Lock and - Double pulse Unlock both on seperate wires.  I can use a relay to seperate the combined signal from the unit but Im unsure about how the drivers door priorty works.  When I hit disarm once does it generate a Single Double (-) pulse and when I disarm twice does it generate Two Double (-) pulses.  And same with the car, does 1 double pulse unlock just the drivers door and 2 double pulse unlock all doors?

Thanks for all your help, if anyone has experince with installing these units or on the Matrix could you please give me some advice.

Thanks, David

David, first, you don't need to use the keysense wire at all on a Matrix. Reason being, it doesn't have a factory alarm. The flashing light on the dash is strickly for the immobilizer. Trust me, i do hundreds of these cars and it's just not needed. As for the bypass needing a keysense, you are correct. Toyotas can see multiple keys after it's already started with no affect. So, you can wire the bypass to engage when it remote starts and it can stay on even after the key is in the ignition.

As for the locks, they are very simple in a Matrix. At the drivers kickpanel there is a white plug half way down coming from the door. In it there is a blue/white, thats your lock wire and will require a negative pulse. Also in the plug is a blue / YELLOW, that is unlock. Giving it a single negative pulse will unlock the drivers door. A second pulse will unlock all the other doors. It's just that simple, no relays needed. This makes it easy to have two stage unlock, doesn't it?

Thanks Mike M2 for all your help so far.  Im not sure if your fimilar with the Compustar 2W900FM or Clifford RSX 3.5 but they have a single wire which pulses two polarities.  Either + Lock / - Unlock or - Lock / + Unlock.  If I dont use relays how do i seperate this single wire into two signals so I can connect to that Blue/White and Blue/ Yellow wire your talking about.

Thanks again

David

I am familiar with the Clifford. The lock wires are a standard way of giving pulses. When one wire pulses a ground the other pulses a positive. That's ok and won't hurt anything. The lock wires in your car won't be affected by that positive pulse. So, what you will do is connect the green negative lock wire from the Clifford to the blue/white in your car to make them lock. Then, connect the blue negative unlock wire to the blue / YELLOW in the car. This will unlock the drivers door. Now if you notice on plug H2 on the Clifford, there's a light blue wire that is marked "second unlock output". This wire will give a negative pulse out the second time you press unlock on the remote. Directly connect this wire to the blue unlock wire and the blue / YELLOW in the car. Now, the first time you press unlock, a negative pulse will come from the blue, unlocking the drivers. The next press will send a signal from the light blue, unlocking all.

Don't over think it, it's just that easy....

Once finally question, does anyone know if theres a bypass for the 2006 Matrix, probably same for 2005 that does not require a key?