2003 LEXUS LS430 climate control

e.INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEAT CUSHION)
a. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-
) lead to terminal 2 (BFC+). Check that the blower fan motor operates smoothly.
If the result is not as specified, replace the blower.
Fig. 85: Inspecting Seat Climate Control Blower LH (Rear Seat Cushion)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
f.INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEAT CUSHION)
a. Connect the battery's positive (+) lead to terminals 3 (BCS) and 4 (BFC-), and the negative (-
) lead to terminal 4 (BFC-). Check that the blower fan motor operates smoothly.
If the result is not as specified, replace the blower.

Fig. 86: Inspecting Seat Climate Control Blower RH (Rear Seat Cushion)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
g.INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEAT CUSHION)
a. Measure the resistance between the terminals when the switch is operated.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the controller.
b. Measure the thermistor resistance between the terminals.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Tester ConnectionConditionSpecified Condition
4 (TDB-) - 5 (TDB+)AlwaysBelow 1 ohms
Tester ConnectionConditionSpecified Condition

HINT:
As the temperature increases, the resistance decreases.
If the result is not as specified, replace the controller.
Fig. 87: Identifying Seat Climate Controller LH Connector Terminals (Rear Seat Cushion)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2 (TCS) - 3 (TC5)Controller temperature 10°C (50°F)3.6 to 3.8 kohms
2 (TCS) - 3 (TC5)Controller temperature 25°C (77°F)1.9 to 2.1 kohms
2 (TCS) - 3 (TC5)Controller temperature 30°C (86°F)1.6 to 1.7 kohms

h.INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEAT CUSHION)
a. Measure the resistance between the terminals when the switch is operated.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the controller.
b. Measure the thermistor resistance between the terminals
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
As the temperature increases, the resistance decreases.
If the result is not as specified, replace the controller.
Tester ConnectionConditionSpecified Condition
4 (TDC-) - 5 (TDC+)AlwaysBelow 1 ohms
Tester ConnectionConditionSpecified Condition
2 (TCS) - 3 (TC5)Controller temperature 10°C (50°F)3.6 to 3.8 kohms
2 (TCS) - 3 (TC5)Controller temperature 25°C (77°F)1.9 to 2.1 kohms
2 (TCS) - 3 (TC5)Controller temperature 30°C (86°F)1.6 to 1.7 kohms

Fig. 88: Identifying Seat Climate Controller RH Connector Terminals (Rear Seat Cushion)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
i.INSPECT SEAT CLIMATE CONTROL BLOWER LH (REAR SEATBACK)
a. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-
) lead to terminal 2 (BFB+). Check that the blower fan motor operates smoothly.
If the result is not as specified, replace the blower.

Fig. 89: Inspecting Seat Climate Control Blower LH (Rear Seatback)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
j.INSPECT SEAT CLIMATE CONTROL BLOWER RH (REAR SEATBACK)
a. Connect the battery's positive (+) lead to terminals 3 (BBS) and 4 (BFB-), and the negative (-
) lead to terminal 2 (BFB+). Check that the blower fan motor operates smoothly.
If the result is not as specified, replace the blower.

Fig. 90: Inspecting Seat Climate Control Blower RH (Rear Seatback)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
k.INSPECT SEAT CLIMATE CONTROLLER LH (REAR SEATBACK)
a. Measure the resistance between the terminals when the switch is operated.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the controller.
b. Measure the thermistor resistance between the terminals
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Tester ConnectionConditionSpecified Condition
4 (TDB-) - 5 (TDB+)AlwaysBelow 1 ohms
Tester ConnectionConditionSpecified Condition

HINT:
As the temperature increases, the resistance decreases.
If the result is not as specified, replace the controller.
Fig. 91: Identifying Seat Climate Controller LH Connector Terminals (Rear Seatback)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
l.INSPECT SEAT CLIMATE CONTROLLER RH (REAR SEATBACK)
2 (TBS) - 3 (TB5)Controller temperature 10°C (50°F)3.6 to 3.8 kohms
2 (TBS) - 3 (TB5)Controller temperature 25°C (77°F)1.9 to 2.1 kohms
2 (TBS) - 3 (TB5)Controller temperature 30°C (86°F)1.6 to 1.7 kohms