Seat Heater Switches
To turn on the seat heater, push the switch. The ignition switch must be in the ON position. Each time you push the switch, the mode changes in order from the HI (high heating temperature) mode to LO (low heat temperature) mode to off. The seat heater automatically changes to off mode when the ignition switch is turned to the ACC or LOCK position. When the ignition switch is turned to the ON position again, the seat heater remains off until the switch is pushed.
The HI, LO and OFF settings of the seat heater can be switched by pressing the seat heater switch (for driver or front passenger). Based on the signals from the temperature sensor that is built into the seat heater, the air conditioning ECU turns the built-in seat heater relay ON/OFF in order to regulate the temperature that suits the set mode. See Fig 1. A seat heater switch with a built-in indicator light for checking the heater operation (OFF, LO or HI) is provided.
Based on the signals from the temperature sensor that is built into the seat heater, the air conditioning ECU turns the built-in seat heater relay ON/OFF in order to regulate the temperature to the standard temperature that is prescribed for each mode. See Fig 2.