System Description
- The climate controlled seat system is controlled by the climate controlled seat control unit.
- Operation of the climate controlled seat switch sends heated or cooled airflow and adjusts the seat temperature.
- A thermal electric device (TED) unit is installed in the seat cushion and seatback. The device heats or cools, sends airflow to the seat surface, and adjusts the seat temperature.
- The thermal electric device (TED) is a heat exchanger that has a function to heat or cool the airflow from the climate controlled seat blower motor. By changing the direction of the current from the power supply, the device takes or gives heat, and adjusts the heat exchange process depending on voltage. NOTE: The climate controlled seat blower motor maintains low speed for approximately 60 seconds after turning the climate controlled seat switch off. CAUTION: The thermal electric device has a dual-climate function that allows one side to operate at a high temperature and the other to operate at a low temperature simultaneously. Before starting work, always turn OFF the switch and check that the thermal electric device is cold.
Component Description
| Item | Function |
|---|---|
| Climate controlled seat relay | Supplies power to the climate controlled seat control unit in accordance with the key switch position that is ON or OFF |
| Climate controlled seat control unit | Installed in the seat cushion backside and controls the climate controlled seat blower motor, seatback thermal electric device, and seat cushion thermal electric device in accordance with the input signal |
| Climate controlled seat switch | Installed in the center console and transmits signals to climate controlled seat control unit in accordance with the HEAT (heated airflow) or COOL (cooled airflow) switch operation and the temperature switch operation |
| Climate controlled seat blower motor | Installed in the seat cushion backside and sends the airflow to the seatback thermal electric device and seat cushion thermal electric device in accordance with the control from the climate controlled seat control unit |
| Seatback thermal electric device | Installed in the seatback backside and heats or cools the airflow from the climate controlled seat blower motor in accordance with the control from the climate controlled seat control unit |
| Seat cushion thermal electric device | Installed in the seat cushion backside and heats or cools the airflow from the climate controlled seat blower motor in accordance with the control from the climate controlled seat control unit |
FUNCTION CHART
Regarding Wiring Diagram information, refer to " WIRING DIAGRAM ".
Scheme 1
Scheme 2
Scheme 3
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Scheme 9
- CHECK FUSES Check for blown fuses. FUSE LIST System component Power Source Fuse or Fusible Link Location Climate controlled seat control unit Ignition switch ON or START 3 (10A) Fuse block (J/B) Battery 28 (15A) Fuse and fusible link box Battery H (40A) Fuse and fusible link box Is the inspection result normal? YES >> GO TO 2. NO >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse or fusible link.
- CHECK BATTERY POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect climate controlled seat control unit connector B217. Check voltage between climate controlled seat control unit connector B217 terminal 29 and ground. VOLTAGE REFERENCE CHART Connector Terminal Ground Voltage (Approx.) B217 29 - Battery voltage Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 6 .
- CHECK IGNITION POWER SUPPLY CIRCUIT Disconnect climate controlled seat control unit connector B216. Check voltage between climate controlled seat control unit connector B216 terminal 21 and ground. VOLTAGE REFERENCE CHART Connector Terminal Ground Ignition switch Voltage (Approx.) B216 21 - OFF 0V ON Battery voltage START Battery voltage Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 5 .
- CHECK GROUND CIRCUIT Turn ignition switch OFF. Check continuity between climate controlled seat control unit connector B217 terminal 30 and ground. CONTINUITY REFERENCE CHART Connector Terminal Ground Continuity B217 30 - Yes Is the inspection result normal? YES >> Inspection End. NO >> Repair the harness or connectors.
- CHECK CLIMATE CONTROLLED SEAT RELAY Perform the climate controlled seat relay component inspection. Refer to " «CLIMATE CONTROLLED SEAT CONTROL UNIT : COMPONENT INSPECTION (CLIMATE CONTROLLED SEAT RELAY)»(ref-388069-S31849868842011022800000) ". Is the inspection result normal? YES >> GO TO 8 . NO >> Replace the climate controlled seat relay.
- CHECK CIRCUIT BREAKER POWER SUPPLY CIRCUIT Disconnect the circuit breaker connector M84. Check voltage between circuit breaker connector M84 terminal 1 and ground. VOLTAGE REFERENCE CHART Connector Terminal Ground Voltage (Approx.) M84 1 - Battery voltage Is the inspection result normal? YES >> GO TO 7. NO >> Repair the harness or connectors.
- CHECK BATTERY POWER SUPPLY CIRCUIT FOR OPEN Check continuity between circuit breaker connector M84 (A) terminal 2 and climate controlled seat control unit connector B217 (B) terminal 29. CONTINUITY REFERENCE CHART Circuit Breaker Climate Controlled Seat Control Unit Continuity Connector Terminal Connector Terminal M84 (A) 2 B217 (B) 29 Yes Is the inspection result normal? YES >> Replace the circuit breaker. NO >> Repair the harness or connectors.
- CHECK CLIMATE CONTROLLED SEAT RELAY BATTERY POWER SUPPLY CIRCUIT Disconnect climate controlled seat relay connector. Check voltage between climate controlled seat relay connector M58 terminal 3 and ground. VOLTAGE REFERENCE CHART Connector Terminal Ground Voltage (Approx.) M58 3 - Battery voltage Is the inspection result normal? YES >> GO TO 9. NO >> Repair the harness or connectors.
- CHECK CLIMATE CONTROLLED SEAT RELAY IGNITION POWER SUPPLY CIRCUIT Check voltage between climate controlled seat relay connector M58 terminal 2 and ground. VOLTAGE REFERENCE CHART Connector Terminal Ground Ignition switch Voltage (Approx.) M58 2 - OFF 0V ON Battery voltage START Battery voltage Is the inspection result normal? YES >> GO TO 10. NO >> Repair the harness or connectors.
- CHECK IGNITION POWER SUPPLY CIRCUIT FOR OPEN Check continuity between climate controlled seat relay connector M58 (A) terminal 5 and climate controlled seat control unit connector B216 (B) terminal 21. CONTINUITY REFERENCE CHART Climate Controlled Seat Relay Climate Controlled Seat Control Unit Continuity Connector Terminal Connector Terminal M58 (A) 5 B216 (B) 21 Yes Is the inspection result normal? YES >> GO TO 11. NO >> Repair the harness or connectors.
- CHECK CLIMATE CONTROLLED SEAT RELAY GROUND CIRCUIT Check continuity between climate controlled seat relay connector M58 terminal 1 and ground. CONTINUITY REFERENCE CHART Connector Terminal Ground Continuity M58 1 - Yes Is the inspection result normal? YES >> Check intermittent incident. Refer to " «INTERMITTENT INCIDENT»(ref-388039-S29430263232011022800000) ". NO >> Repair the harness or connectors.
Scheme 10
- CHECK CLIMATE CONTROLLED SEAT RELAY Apply battery voltage between terminals 2 and 1 of the climate controlled seat relay. CAUTION: Connect a fuse between the terminals when applying battery voltage. Check continuity between climate controlled seat relay terminals 5 and 3. CONTINUITY REFERENCE CHART Climate Controlled Seat Relay Terminals Condition Continuity 5 and 3 Battery voltage applied between terminals 2 and 1. Yes Is the inspection result normal? YES >> Inspection End. NO >> Replace climate controlled seat relay.
Description
Sends airflow to the seat cushion and seatback.
Provides cooling and heat for the seat cushion.
Provides cooling and heat for the seatback.
Provides inputs to the climate controlled seat control unit for climate controlled seat operation.
Illuminates the climate controlled seat switch to indicate operating status.