2007 toyota sienna car starter

Relay isn't required, if you have no by-pass just join the status (a.k.a. GWR) wire to the blue/black keysense wire. Another train crash guys, this one a bit slower.

From my experience, there is no way to fool the vehicle and get the Factory Keyless Entry FOB's to work while the engine is running ( either under remote starter or under key ).  Howards suggestion using GWR on the Keysense wire will disarm the Factory Alarm, if present

As noted earlier, most installers will install a remote start with keyless entry on vehicles like this, due to this very reason.  As MikeM2 kindly mentioned previously, your one button remote start system can be setup to allow an unlock during remote start.  ( No lock or re-lock, though.)

Soldering is fun!

do you have any idea how to do it, i tried but couldn't figure it out.

Sorry, no idea.  Audiovox is not one of my brands.  Here is the info MikeM2 posted :

The 901 does unlock the doors also. By holding the single button down for 5 seconds it will pulse the BLACK/ blue whenever the RS is on, giving the owner a way to unlock without a key. We always connect this on cars that have an inactive remote when running.

Besides connecting the BLACK/ Blue wire to the cars Unlock wire, you might have to do some programming to Option 17.  Not sure.  Perhaps MikeM2 can assist you.

Soldering is fun!

Definitely could have bought the APS57C for around $5.00 more and had your keyless and remote start all one one remote. In fact, if you think you have another car to do in the future that could use the 901C.....they're the same plugs. You could buy an APS57C, plug it into the wiring you've already installed in your car....then put the 901C in the box with the new wiring from the APS57C and save it for another car. And I've tried before to keep the keyless working during remote start on a Sienna. I found some ignition wire at the BCM I could cut, but then it made all kinds of check engine lights, and the heater didn't work during remote start anymore, so that wouldn't work. But anyway, yes, the 901C can unlock the doors for you during remote start. There are two ways to do this. The "official" way the product was (poorly) designed to be used, and then a better way that a co-worker of mine came up with: Official way to do it: Find and test the lock and unlock wires that are listed on whatever tech sheet you have. They will test as a ground when you turn the key back and forth in the outside of the driver's door. Connect the 901C's BLACK/ green to the car's lock wire, and the BLACK/ blue to the unlock wire. How it will work: When you activate the remote starter, the BLACK/ blue will temporarily unlock the door. After the car completes the remote start process, the BLACK/ green will lock it back up. Then, when you approach the car with the remote starter running, push and hold the remote (it takes a long time) and eventually the door will unlock so you can get in. Optional: If you program the BLACK/ blue output for double pulse, the 901C will unlock all the doors for you. (If you leave it as default, it's going to unlock only the driver's door.) Totally up to you which way you want it. So anyway, the sucky/stupid part is that this thing will be unnecessarily cycling your locks every time you hit the remote starter. Better way to do it: Go to the wires in the kick panel that come from the driver's door. Test EVERY wire in those bundles until you find the one that makes a ground when you press the unlock switch on the driver's door panel, NOT the one from turning the key cylinder. This wire isn't listed on any tech sheet I've seen; you'll have to test and find it for yourself. Hint: If the driver's window/door switch pops out easily, pop it out, make a mental note of the wire color behind the switch....now you'll have an easier time finding it in the kick panel. Now, connect the 901C's BLACK/ blue to this wire, and make NO other connection. You won't need the BLACK/ green for anything. How it works: On Toyotas, the interior unlock switch is disabled when the car is locked and the car is off; the car is designed this way. So, when you activate the remote starter, the BLACK/ blue will pulse this wire trying to unlock the car, but it won't happen because Toyota doesn't allow it. Then, after the car remote starts, the wire becomes "alive" again. As you approach the car and hold down the button on the APS901C, it'll pulse the Toyota wire, unlocking all the doors. Note that while this method keeps the car's locks from cycling unnecessarily, and allows you to only connect one wire to the car instead of two, keep in mind that you no longer have the option of choosing to unlock only the driver's door----they'll all unlock together.