Page 1617 of 4500
Result:
RESULT REFERENCE
Fig. 23: Checking Seat Climate Control Controller (Seatback)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
B: REPLACE SEAT CLIMATE CONTROL CONTROLLER (SEATBACK)
A: Go to next step
6.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - SEAT CLIMATE CONTROLLER (SEATBACK))
HINT:
When the rear LH indicator is blinkin
g, check the rear LH connector. When the rear RH indicator is
ResultProceed to
Indicator continues blinkingA
Indicator turns offB
Page 1618 of 4500
blinking, check the rear RH connector.
a. Disconnect the C28 or C30 blower connector.
b. Disconnect the S52 or S54 controller 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
C28-2 (TDB-) - S52-4 (TDB-)Below 1 ohms
C28-2 (TDB-) - Body ground10 kohms or higher
C28-1 (TDB+) - S52-5 (TDB+)Below 1 ohms
C28-1 (TDB+) - Body ground10 kohms or higher
C28-1 (TDB+) - C28-2 (TDB-)10 kohms or higher
Tester ConnectionSpecified Condition
C30-2 (TDB-) - S54-4 (TDB-)Below 1 ohms
C30-2 (TDB-) - Body ground10 kohms or higher
C30-1 (TDB+) - S54-5 (TDB+)Below 1 ohms
C30-1 (TDB+) - Body ground10 kohms or higher
C30-1 (TDB+) - S30-2 (TDB-)10 kohms or higher
Page 1619 of 4500
Page 1620 of 4500
Fig. 24: Identifying Seat Climate Control Blower Connector Terminals And Seat Climate
Controller Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
7.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEAT CUSHION)
HINT:
When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is
blinking, check the rear RH connector.
a. Disconnect the S53 or S55 blower connector.
b. Connect the wire harness to terminal 5 (TDC+) and 4 (TDC-) of the wire harness side connector, as
shown in the illustration.
c. Turn the ignition switch ON.
d. Turn the climate control switch ON, and then check that the climate control indicator turns off.
OK: The indicator turns off
Page 1621 of 4500
<0029004c004a0011000300150018001d00030026004b00480046004e004c0051004a0003003600480044005700030026004f004c00500044005700480003002600520051005700550052004f0003002600520051005700550052004f004f00480055000300
0b00360048004400570003002600580056004b004c00520051[)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 8
OK: REPLACE SEAT CLIMATE CONTROLLER (SEAT CUSHION)
8.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - SEAT CLIMATE CONTROLLER (SEAT CUSHION))
HINT:
When the rear LH indicator is blinking, check the rear LH connector. When the rear RH indicator is
blinking, check the rear RH connector.
a. Disconnect the C28 or C30 blower connector.
b. Disconnect the S53 or S55 controller connector.
c. Measure the resistance of between the wire harness side connectors.
Standard:
Page 1622 of 4500
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR LH
Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Tester ConnectionSpecified Condition
C28-11 (TDC-) - S53-4 (TDC-)Below 1 ohms
C28-11 (TDC-) - Body ground10 kohms or higher
C28-10 (TDC+) - S53-5 (TDC+)Below 1 ohms
C28-10 (TDC+) - Body ground10 kohms or higher
C28-10 (TDC+) - C28-11 (TDC-)10 kohms or higher
Tester ConnectionSpecified Condition
C30-11 (TDC-) - S55-4 (TDC-)Below 1 ohms
C30-11 (TDC-) - Body ground10 kohms or higher
C30-10 (TDC+) - S55-5 (TDC+)Below 1 ohms
C30-10 (TDC+) - Body ground10 kohms or higher
C30-10 (TDC+) - C30-11 (TDC-)10 kohms or higher
Page 1623 of 4500
Page 1624 of 4500

Fig. 26: Identifying Seat Climate Control Blower Connector Terminals And Seat Climate
Controller Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
9.CHECK SEAT HEATER (SEATBACK) (SEE INSPECTION
)
NG: REPLACE REAR SEATBACK PAD
OK: Go to next step
10.INSPECT SEAT HEATER (SEAT CUSHION) (SEE INSPECTION
)
NG: REPLACE SEAT CUSHION PAD
OK: Go to next step
11.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - SEAT HEATER)
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 C28 or C30 blower connector.
b. Disconnect the S60 or S61 heater 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
C28-8 (E) - S60-3 (E)Below 1 ohms
C28-8 (E) - S60-1 (B)10 kohms or higher
C28-18 (B) - S60-1 (B)Below 1 ohms
C28-18 (B) - S60-3 (E)10 kohms or higher