1. Disconnect the heater connector and measure the resistance between pins 1 and 3. Rated value: 2.31 ohms±10% (pillow - 1.15 Ohm; back - 1.16 Ohm).
2. Connect the connector and turn on the seat heating. Check the thermostat by measuring the temperature of the seat surface.
3. Check the circuit between the contacts by disconnecting the connector. Rated value: 28±3.5°C (circuit is closed); 37±3.0°С (open circuit).