Page 1697 of 4500
Fig. 75: Identifying Climate Control Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
12.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - CLIMATE CONTROL SWITCH)
a. Disconnect the C27 or C29 blower connector.
b. Disconnect the C31 switch connector.
c. Measure the resistance of the wire harness side connectors.
Standard:
Page 1698 of 4500
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Tester ConnectionSpecified Condition
C31-11 (SWL) - C27-8 (SW)Below 1 ohms
Tester ConnectionSpecified Condition
C31-4 (SWR) - C29-8 (SW)Below 1 ohms
Page 1699 of 4500
Page 1700 of 4500

Fig. 76: Identifying Seat Climate Control Blower Connector Terminals And Climate Control
Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
1.Driver's side:
INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT)
a. Measure the resistance between the terminals when the switch is operated.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
As the dial is being turned, the resistance changes gradually.
If the result is not as specified, replace the switch.
b. Check that the climate control switch indicator illuminates.
OK:
MEASUREMENT CONDITION AND SPECIFIED CONDITION
If the result is not as specified, replace the switch or bulb.
c. Check that the climate control switch illuminates.
OK:
MEASUREMENT CONDITION AND SPECIFIED CONDITION
Tester ConnectionConditionSpecified Condition
1 (LV5) - 12 (LVS)Switch ON (LH) Max. COOL to Max. WARM0 to 5 kohms
Measurement ConditionSwitch
ConditionSpecified
Condition
Battery positive (+) --> Terminal 3 (LIND) Battery negative (-)
--> Terminal 6 (E)ON (LH)Illuminates
Specified
Page 1701 of 4500
If the result is not as specified, replace the switch or bulb.
Measurement ConditionCondition
Battery positive (+) --> Terminal 20 (ILL+) Battery negative (-) --> Terminal 5
(ILL-)Illuminates
Page 1702 of 4500
Page 1703 of 4500

Fig. 77: Identifying Traction Control Switch Connector Terminals -Driver Side (Climate Control
Switch Front)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.Passenger's side:
INSPECT TRACTION CONTROL SWITCH (CLIMATE CONTROL SWITCH FRONT)
a. Measure the resistance between the terminals when the switch is operated.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
As the dial is being turned, the resistance changes gradually.
If the result is not as specified, replace the switch.
b. Check that the climate control switch indicator illuminates.
OK:
MEASUREMENT CONDITION AND SPECIFIED CONDITION
If the result is not as specified, replace the switch or bulb.
c. Check that the climate control switch illuminates.
OK:
MEASUREMENT CONDITION AND SPECIFIED CONDITION
If the result is not as specified, replace the switch or bulb.
Tester ConnectionConditionSpecified Condition
15 (RV5) - 16 (RVS)Switch ON (RH) Max. COOL to Max. WARM0 to 5 kohms
Measurement ConditionSwitch
ConditionSpecified
Condition
Battery positive (+) --> Terminal 2 (RIND) Battery negative (-
) --> Terminal 6 (E)ON (RH)Illuminates
Measurement ConditionSpecified
Condition
Battery positive (+) --> Terminal 20 (ILL+) Battery negative (-) --> Terminal 5
(ILL-)Illuminates
Page 1704 of 4500
Fig. 78: Identifying Traction Control Switch Connector Terminals - Passenger Side (Climate
Control Switch Front)