Page 1625 of 4500
Tester ConnectionSpecified Condition
C30-8 (E) - S61-3 (E)Below 1 ohms
C30-8 (E) - S61-1 (B)10 kohms or higher
C30-18 (B) - S61-1 (B)Below 1 ohms
C30-18 (B) - S61-3 (E)10 kohms or higher
Page 1626 of 4500
Page 1627 of 4500

Fig. 27: Identifying Seat Climate Control Blower Connector Terminals And Seat Heater Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
12.INSPECT SEAT CLIMATE CONTROL BLOWER (FAN MOTOR OF SEATBACK) (SEE
INSPECTION
)
NG: REPLACE SEAT CLIMATE CONTROL BLOWER (SEATBACK)
OK: Go to next step
13.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - SEAT CLIMATE FAN MOTOR)
HINT:
When the indicator of rear left side is blinking, check the rear left side connector. When the indicator of
rear right side is blinking, check the rear right side connector.
a. Disconnect the C27 or C29 blower connector.
b. Disconnect the S56 or S58 motor connector.
c. Measure the resistance of the wire harness side connectors.
Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR LH
Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Tester ConnectionSpecified Condition
C27-3 (BBS) - S56-3 (BBS)Below 1 ohms
C27-3 (BBS) - S56-2 (BFB(+))10 kohms or higher
C27-2 (BFB+) - S56-2 (BFB(+))Below 1 ohms
C27-2 (BFB+) - S56-3 (BBS)10 kohms or higher
Tester ConnectionSpecified Condition
C29-3 (BBS) - S58-3 (BBS)Below 1 ohms
C29-3 (BBS) - S58-2 (BFB(+))10 kohms or higher
C29-2 (BFB+) - S58-2 (BFB(+))Below 1 ohms
Page 1628 of 4500
<0029004c004a001100030015001b001d0003002c0047004800510057004c0049005c004c0051004a0003003600480044005700030026004f004c00500044005700480003002600520051005700550052004f00030025004f0052005a004800550003002600
52005100510048004600570052005500030037004800550050[inals And Seat Climate Fan
Motor Connector Terminals
C29-2 (BFB+) - S58-3 (BBS)10 kohms or higher
Page 1629 of 4500
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)
CIRCUIT DESCRIPTION
When the climate control switch's volume control circuit is open or short circuit and abnormal codes are input to
the VS terminal, all output will be stopped and the indicator illuminates according to blinking pattern 2.
WIRING DIAGRAM
Page 1630 of 4500
Fig. 29: Climate Control Does Not Operate (Blinking Pattern 2) Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT FRONT SEAT HEATER SWITCH (INDICATOR)
a. Check that the climate control indicator is blinkin
g.
Page 1631 of 4500

Result:
RESULT REFERENCE
B: Go to step 4
A: Go to next step
2.INSPECT FRONT SEAT HEATER SWITCH (FRONT) (SEE INSPECTION
)
NG: REPLACE CLIMATE CONTROL SWITCH
OK: Go to next step
3.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - CLIMATE CONTROL SWITCH)
HINT:
When the indicator of driver's side is blinking, check the driver's side connector. When the indicator of
passenger's side is blinking, check the passenger's side connector.
a. Disconnect the C20 or C21 blower connector.
b. Measure the resistance of the wire harness side connector.
Standard:
Driver side
TESTER CONNECTION AND SPECIFIED CONDITION - DRIVER SIDE
Passenger side
TESTER CONNECTION AND SPECIFIED CONDITION - PASSENGER SIDE
ResultProceed to
Front climate control switch indicator is blinkingA
Rear climate control switch indicator is blinkingB
Tester ConnectionConditionSpecified Condition
C20-12 (VS) - C20-13 (V5)MAX. WARM --> MAX. COOL0 --> 5 kohms
C20-9 (VG) - C20-12 (VS)MAX. COOL --> MAX. WARM0 --> 5 kohms
Tester ConnectionConditionSpecified Condition
C21-12 (VS) - C21-13 (V5)MAX. WARM --> MAX. COOL0 --> 5 kohms
C21-9 (VG) - C21-12 (VS)MAX. COOL --> MAX. WARM0 --> 5 kohms
Page 1632 of 4500
Fig. 30: 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)
4.INSPECT CLIMATE CONTROL SWITCH (SEE INSPECTION
)
NG: REPLACE CLIMATE CONTROL SWITCH
OK: Go to next step
5.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - CLIMATE CONTROL SWITCH)
HINT:
When the indicator of rear left side is blinking, check the rear left side connector. When the indicator of