Inspection Procedure
- CHECK SEAT HEATER (INDICATOR)
- Check that the climate control indicator is blinking.
Result:
RESULT REFERENCEResult Proceed to Front climate control switch indicator is blinking A Rear climate control switch indicator is blinking B B: Go to step 5
A: Go to next step
- INSPECT FRONT SEAT HEATER SWITCH (THERMISTOR OF SEATBACK) (SEE INSPECTION
)
NG: REPLACE FRONT SEAT HEATER SWITCH
OK: Go to next step
- CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER (SEATBACK))
HINT:
When the driver side indicator is blinking, check the driver side connector. When the passenger side indicator is blinking, check the passenger side connector.
- Disconnect the C20 or C21 blower connector.
- Disconnect the S34 or S35 controller connector.
- Measure the resistance of the wire harness side connectors.
Standard:
Driver side
TESTER CONNECTION AND SPECIFIED CONDITION - DRIVER SIDETester Connection Specified Condition C20-3 (TBS) - S34-2 (TBS) Below 1 Ω C20-4 (TB5) - S34-3 (TB5) Below 1 Ω Passenger side
TESTER CONNECTION AND SPECIFIED CONDITION - PASSENGER SIDETester Connection Specified Condition C21-3 (TBS) - S35-2 (TBS) Below 1 Ω C21-4 (TB5) - S35-3 (TB5) Below 1 Ω Fig 1: Identifying Seat Climate Control Blower Connector Terminals And Seat Climate Controller Connector TerminalsCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
- CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:
When the driver side indicator is blinking, check the driver side connector. When the passenger side indicator is blinking, check the passenger side connector.
- Disconnect the S48 or S49 controller connector.
- Measure the resistance of the wire harness side connector.
Standard:
Driver side
TESTER CONNECTION AND SPECIFIED CONDITION - DRIVER SIDETester Connection Ambient Temperature Specified Condition S48-2 (TC5) - S48-1 (TCS) 10°C (50°F) Approx. 3.7 kΩ S48-2 (TC5) - S48-1 (TCS) 25°C (77°F) Approx. 2 kΩ S48-2 (TC5) - S48-1 (TCS) 30°C (86°F) Approx. 1.7 kΩ Passenger side
TESTER CONNECTION AND SPECIFIED CONDITION - PASSENGER SIDETester Connection Ambient Temperature Specified Condition S49-2 (TC5) - S49-1 (TCS) 10°C (50°F) Approx. 3.7 kΩ S49-2 (TC5) - S49-1 (TCS) 25°C (77°F) Approx. 2 kΩ S49-2 (TC5) - S49-1 (TCS) 30°C (86°F) Approx. 1.7 kΩ HINT:
As the temperature increases, the resistance decreases.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE FRONT SEAT HEATER SWITCH
OK: REPLACE SEAT CLIMATE CONTROL CONTROLLER
- INSPECT REAR SEAT HEATER SWITCH (THERMISTOR OF SEATBACK) (SEE INSPECTION
)
NG: REPLACE FRONT SEAT HEATER SWITCH
OK: Go to next step
- CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:
When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
- Disconnect the C28 or C30 blower connector.
- Disconnect the S52 or S54 controller connector.
- Measure the resistance of the wire harness side connectors.
Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR LHTester Connection Specified Condition C28-16 (TBS) - S52-2 (TBS) Below 1 Ω C28-7 (TB5) - S52-3 (TB5) Below 1 Ω Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RHTester Connection Specified Condition C30-16 (TBS) - S54-2 (TBS) Below 1 Ω C30-7 (TB5) - S54-3 (TB5) Below 1 Ω Fig 3: Identifying Seat Climate Control Blower Connector Terminals And Seat Climate Controller Connector TerminalsCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
- INSPECT SEAT CLIMATE CONTROL CONTROLLER (THERMISTOR OF SEAT CUSHION) (SEE INSPECTION
)
NG: REPLACE FRONT SEAT HEATER SWITCH
OK: Go to next step
- CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT CLIMATE CONTROLLER)
HINT:
When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
- Disconnect the C28 or C30 blower connector.
- Disconnect the S53 or S55 controller connector.
- Measure the resistance of the wire harness side connectors.
Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR LHTester Connection Specified Condition C28-6 (TC5) - S53-3 (TC5) Below 1 Ω C28-15 (TCS) - S53-2 (TCS) Below 1 Ω Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RHTester Connection Specified Condition C30-6 (TC5) - S55-3 (TC5) Below 1 Ω C30-15 (TCS) - S55-2 (TCS) Below 1 Ω Fig 4: Identifying Seat Climate Control Blower Connector Terminals And Seat Climate Controller Connector TerminalsCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
- INSPECT SEAT HEATER (THERMISTOR) (SEE INSPECTION
)
NG: REPLACE SEAT CUSHION PAD
OK: Go to next step
- CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU) - SEAT HEATER)
HINT:
When the rear LH indicator is blinking, check the rear LH side connector. When the rear RH indicator is blinking, check the rear right RH side connector.
- Disconnect the C28 or C30 blower connector.
- Disconnect the S60 or S61 controller connector.
- Measure the resistance of the wire harness side connectors.
Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR LHTester Connection Specified Condition C28-5 (H5) - S60-2 (H5) Below 1 Ω C28-14 (HS) - S60-4 (HS) Below 1 Ω Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RHTester Connection Specified Condition C30-5 (H5) - S61-2 (H5) Below 1 Ω C30-14 (HS) - S61-4 (HS) Below 1 Ω Fig 5: Identifying Seat Climate Control Blower Connector Terminals And Seat Heater Connector TerminalsCourtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE SEAT CLIMATE CONTROL CONTROLLER (CLIMATE CONTROL ECU)