SEAT WARMER SYSTEM
id091300101200
Outline
Functions
Structure/Construction
Construction
Front
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Second-row
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System wiring diagram
Front (without seat ventilation system)
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Front (with seat ventilation system)
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Second-row (without seat ventilation system)
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Second-row (with seat ventilation system)
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Operation
Front
1. When the seat warmer switch (driver) is operated (1), the indicator unit or the front climate control unit sends (2) a temperature level signal according to the seat warmer switch operation to the seat warmer control unit.
2. When the seat warmer control unit receives a temperature level signal from the indicator unit, it turns the transistor on (3) and the relay on (4).
3. When the relay turns on, power is supplied (5) to the driver's seat warmer unit and the seat warmer unit warms.
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Second-row
1. When the CPU of the second-row seat warmer switch detects the second-row seat warmer switch (LH) operation, it sends (1) a switch operation signal (temperature level “3”) to the CPU of the second-row seat warmer control unit.
2. When the CPU of the second-row seat warmer control unit receives the switch operation signal (temperature level “3”) from the second-row seat switch, it sends current to the transistor to turn it on (2).
3. Current flows (3) to the FET by turning the transistor on.
4. The current flows (4) to the relay coil to turn the relay switch on (5).
5. When the relay switch is turned on, the ground circuit is established and the current flows (6) to the second-row seat warmer unit in the second-row seat cushion (LH) and second-row seat back (LH).
6. The heating wire warms up (7) by the current sent to the second-row seat warmer unit in the second-row seat cushion (LH) and second-row seat back (LH).
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Fail-safe