2010-2015 Toyota Prius Push-to-Start Remote Car Starter Kit with Factory T-Harness for Easy Installation | Perfect for Cold Winter Mornings & Secure Vehicle Warm-Up

Prius remote start installBy DON M. on May 23, 2018Verified PurchaseWorks as described but here are some tips to make it really easy. There are some other good suggestions here as well.Overview. Installed on a 2014 Toyota Prius v five w/ATP.1. The box includes the T Harness dongle with the ODB2 connector. It has a blue connector that plugs into the start unit. The start unit is flashed with the latest software prior to shipping.2. You will only use 3 wires from the harness that goes from the remote start unit to the wires from the ECU. That harness has a red connector to match the red port on the remote start unit. It is the only connector that will fit in the unit's red port. The other 3 bundles of wires just put aside, they will not be used. My car also had a few more couplings at the ECU. They have to do with my Advanced Technology Package. Aside from that, everything aligned with the directions, and photos from other reviewers.3. Most of the instructions do not apply to the remote start install. They only apply if you are installing additional units and features.4. The wiring diagram shows the wires by location with a number, and on a separate page, by their color. The instructions are clear as to which wires to use when you match up the wiring diagram picture with the physical ECU connector.5. Do not touch the reset button on the start unit. It should work straight out of the box. (In case you do, the correct setting is Option 1=2, 2=1, 3=1).Installation:1. Disconnect battery negative terminal located in the back right fender2. Remove the cover on the left drivers side, below the air vent. This cover is the one which hosts up to 4 buttons and will give you access to the ECU.It is easy. Pry off using a putty knife. There’s no need to remove the button wiring, just let the cover hang down. This is the only cover you will need to pry off.3. Once this is off, you can see the ECU. There are 4 wiring modules in the ECU lined up vertically in 2 rows. The connector you need is the one on the top right. You will see two connectors there; one above of the other. You want the top one. It has a white clip you press to release. Unplug it. The wiring diagram says you will be viewing from the "wire side," looking at the connector as if it was still plugged in. My wires were purple, yellow and green from that ECU harness. The wiring diagram will tell you which wires to splice into the ECU wires. You only use 3 wires: parking lights, BXR, BXT Secure the rest.Red connector wire Yellow/black splice to ECU wire (4) Purple.Red connector wire Orange/black splice to ECU wire (16) Green.Red connector wire Red/black splice to ECU wire (30) Yellow.The hardest part is shaving the wires to expose bare wire to connect to. I’m sure there are many ways to do this. If you end up cutting a wire, it’s okay. You just need to splice 3 wires together instead of two. I did not cut any. You will also need to cut and remove about 2” of tubing covering the wires. This is so you’ll have enough room to remove about ¼ inch of insulation from around each wire you intend to splice. I used a small Exacto knife. Once that is done, take the 3 wires from the start unit that matches the correct 3 wires from the ECU, according to the diagram and wrap them together. Then tape them tightly with electrical tape. Others have soldered; I was just wrapped and taped.Test first.4. Once the wires are connected, test that it works. Make sure any excess wire is secured. I left the cover off until I was sure everything was working correctly. I did not get any error or warning lights on the dash. The OBD2 dongle has a long yellow wire running from the ODB2 connector. You do not need it.5. Reconnect the battery.6. Start your vehicle as normal. You should see the remote start unit light turn green for a few seconds then turn off.7. Turn off the car.8. Lock your doors. Note: make sure the trunk is closed before trying to lock your car, or you’ll get blinking red lights on the start unit.9. Then press the lock button slowly 3 times.10. You should hear the doors lock and click several times, then hopefully see your dash light up and your car start. If not, check the light on the unit and the diagram document for troubleshooting codes. Otherwise, that’s it; you’re done!The start unit requires 3 lock-clicks after the doors are locked before starting the car. The car will be is running but the doors are locked. You will need to unlock it. This is a safety precaution against someone stealing the car. Another 3 clicks and the ignition will turn off. The car will also shut off when you click to unlock the door or after the car has been running for 10 minutes. When you get in the car you will need to restart it using the start button.These are suggestions and tips only. These instructions worked for me. Use at your own risk.I love the remote start! In winter, it should defrost, warm the seats, and the interior. In the summer, it should cool down the car really nice by starting it a minute or two before getting in.