SEAT HEATER SYSTEM PROBLEM SYMPTOMS TABLE

Note

If the battery voltage is low, the seat heater system may not operate. In this case, check the Data List item "Battery Control Count (Body ECU)".

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Tech Tips


  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Seat Heater System
Symptom Suspected Area Link
Front seat heater does not operate (for LH) Seat heater switch (LH side)*1

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Seat heater switch*2

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Check the thermostat

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Front seat cushion heater assembly LH

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Front seatback heater assembly LH

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Seat heater control sub-assembly LH -
Wire harness or connector -
Front seat heater does not operate (for RH) Seat heater switch (RH side)*1

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Seat heater switch*2

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Check the thermostat

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Front seat cushion heater assembly RH

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Front seatback heater assembly RH

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Seat heater control sub-assembly RH -
Wire harness or connector -
Rear seat heater does not operate (for LH)*3 Check the thermostat

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Seat heater assembly (rear LH side seat cushion)

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Seat heater assembly (rear LH side seatback)

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Seat heater control sub-assembly (rear LH side seat) -
Seat heater switch (No. 2 air conditioning control assembly) -
Wire harness or connector -
Rear seat heater does not operate (for RH)*3 Check the thermostat

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Seat heater assembly (rear RH side seat cushion)

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Seat heater assembly (rear RH side seatback)

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Seat heater control sub-assembly (rear RH side seat) -
Seat heater switch (No. 2 air conditioning control assembly) -
Wire harness or connector -