Start-stop button circuit diagram? Push Button kill switch>

Does anyone have the circuit diagram for the Start-Stop button?

A simple kill switch in the wiring harness to the start function would keep the car from starting.

It very low 5 volts, so a small micro switch will work. It could also be a hidden micro push button that needs to be held dowi with your left hand finger to complete the circuit to start the car. Because it is a momentary push button, it will automatically reset after each use.

An enterprising company could make an adapter kit with the appropriate wiring blocks, wiring and switches for a simple install like drilling just one 1/4 inch hole in an underdash panel for the micro push button switch.

 

Found this information. Would make it easy to wire in a kinn switch.

The 3rd Generation (2010–2015) Toyota Prius Push Button Start switch (connector C17) relies on a 7-pin connector. The switch contains dual momentary contacts and built-in LED illumination, acting as a low-current trigger for the Power Source Control (Smart Key) ECU.
Connector Pinout (Toyota Switch)
Pin # Wire Color Circuit / Function Notes
1 Light Green or Violet Ground for LED Completes circuit for switch illumination
2 Pink LED Illumination Power (+) +12V power for switch internal light
3 Light Blue Switch Status Ground Used for ECU to detect switch state
4 White Switch Contact 2 (SW2) Second independent signal/ground to ECU
5 White Switch Contact 1 (SW1) First independent signal/ground to ECU
6 Green Unused / Spare Often used for specific trim diagnostics or security
7 Gray Immobilizer/Key Check Signal wire verifying valid fob is present
(Note: Wire colors can slightly vary between production years; always verify with a multimeter before splicing.)
Important Considerations:

• Dual-Switch Design: The Prius uses two separate, redundant contacts (SW1 and SW2 on Pins 4 & 5). Both must close simultaneously (full stroke) for the hybrid system to process the button press.
• Immobilizer Lockout: Simply applying 12V to these pins will not start the car. The signal must be processed by the Smart Key ECU, which actively checks for the presence of a valid key fob within the cabin.