2003 LEXUS LS430 Identifying ac

Fig. 78: Identifying Traction Control Switch Connector Terminals - Passenger Side (Climate
Control Switch Front)

Fig. 79: Identifying Seat Climate Controller LH Connector Terminals (Front Seat Cushion)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4.INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEAT CUSHION)
a. Measure the resistance between the terminals.
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 ConnectionSpecified Condition
3 (TDC+) - 6 (TDC-)Below 1 ohms

TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
As the temperature increases, the resistance decreases.
If the result is not as specified, replace the controller.
Fig. 80: Identifying Seat Climate Controller RH Connector Terminals (Front Seat Cushion)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.INSPECT SEAT CLIMATE CONTROLLER LH (FRONT SEATBACK)
a. Measure the resistance between the terminals.
Tester ConnectionConditionSpecified Condition
1 (TCS) - 2 (TC5)Controller temperature 10°C (50°F)3.6 to 3.8 kohms
1 (TCS) - 2 (TC5)Controller temperature 25°C (77°F)1.9 to 2.1 kohms
1 (TCS) - 2 (TC5)Controller temperature 30°C (86°F)1.6 to 1.7 kohms

Fig. 81: Identifying Seat Climate Controller LH Connector Terminals (Front Seatback)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6.INSPECT SEAT CLIMATE CONTROLLER RH (FRONT SEATBACK)
a. Measure the resistance between the terminals.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the controller.
Tester ConnectionSpecified Condition
4 (TDB-) - 5 (TDB+)Below 1 ohms

Fig. 82: Identifying Seat Climate Controller RH Connector Terminals (Front Seatback)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Measure the thermistor resistance between the terminals.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
As the temperature increases, the resistance decreases.
Tester ConnectionConditionSpecified Condition
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

Fig. 83: Identifying Climate Control Switch LH Connector Terminals (Rear)

Fig. 84: Identifying Climate Control Switch RH Connector Terminals (Rear)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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