climate control LEXUS LS430 2003 Factory Owner's Manual

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Pages: 4500, PDF Size: 87.45 MB

LEXUS LS430 2003 Factory Owner's Manual LS430 2003 LEXUS LEXUS https://www.carmanualsonline.info/img/36/57050/w960_57050-0.png LEXUS LS430 2003 Factory Owner's Manual

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Page 1610 of 4500

LEXUS LS430 2003 Factory Owners Manual Fig. 19: Climate Control Does Not Operate (Blinking Pattern 1) Wiring Diagram (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK CLIMATE CONTROL SWITCH (INDICATOR)

Fig. 19: Climate Control Does Not Operate (Blinking Pattern 1) Wiring Diagram (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK CLIMATE CONTROL SWITCH (INDICATOR)
a. Check that the climate control indicator is blinkin
g.

Page 1611 of 4500

LEXUS LS430 2003 Factory Owners Manual Result:
RESULT REFERENCE
B: Go to step 5
A: Go to next step
2.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEATBACK)
HINT:
When the driver side indicator is blinking, check the driver side connecto

Result:
RESULT REFERENCE
B: Go to step 5
A: Go to next step
2.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEATBACK)
HINT:
When the driver side indicator is blinking, check the driver side connector. When the passenger side
indicator is blinking, check the passenger side connector.
a. Disconnect the S34 or S35 controller connector.
b. Connect the wire harness to terminal 4 (TDB-) and 5 (TDB+) of the wire harness side connector.
c. Turn the ignition switch ON.
d. Turn the climate control switch ON, then check that the climate control indicator continues
blinking.
Result:
RESULT REFERENCE
ResultProceed to
Front climate control switch indicator is blinkingA
Rear climate control switch indicator is blinkingB
ResultProceed to
Indicator continues blinkingA
Indicator turns offB

Page 1612 of 4500

LEXUS LS430 2003 Factory Owners Manual Fig. 20: 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
3.CHECK WIRE HA

Fig. 20: 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
3.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - CLIMATE CONTROLLER)
HINT:
When the driver side indicator is blinking, check the driver side connector. When the passenger side
indicator is blinking, check the passenger side connector.
a. Disconnect the C20 or C21 blower connector.
b. Disconnect the S34 or S35 controller connector.
c. Measure the resistance of the wire harness side connectors.
Standard:

Page 1614 of 4500

Fig. 21: Identifying Seat Climate Control Blower Connector And Seat Climate Controller

Page 1615 of 4500

LEXUS LS430 2003 Factory Owners Manual Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
4.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEAT CUSHION)
HINT:
When the dri

Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
4.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEAT CUSHION)
HINT:
When the driver side indicator is blinking, check the driver side connector. When the passenger side
indicator is blinking, check the passenger side connector.
a. Disconnect the S48 or S49 connector.
b. Connect terminal 3 (TDC+) and 6 (TDC-) of the climate control ECU 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 switch indicator turns
off.
OK: The indicator turns off

Page 1616 of 4500

LEXUS LS430 2003 Factory Owners Manual <0029004c004a0011000300150015001d00030026004b00480046004e004c0051004a0003003600480044005700030026004f004c00500044005700480003002600520051005700550052004f0003002600520051005700550052004f004f00480055000

<0029004c004a0011000300150015001d00030026004b00480046004e004c0051004a0003003600480044005700030026004f004c00500044005700480003002600520051005700550052004f0003002600520051005700550052004f004f00480055000300
0b00360048004400570003002600580056004b004c00520051[)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE SEAT CLIMATE CONTROL BLOWER REPAIR SEAT CLIMATE CONTROL
BLOWER (CLIMATE CONTROL ECU)
OK: REPLACE SEAT CLIMATE CONTROLLER (SEAT CUSHION)
5.CHECK SEAT CLIMATE CONTROL CONTROLLER (SEATBACK)
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 S52 or S54 controller connector.
b. Connect the wire harness to terminal 4 (TDB-) and 5 (TDB+) of the wire harness side connector.
c. Turn the ignition switch ON.
d. Turn the climate control switch ON, and then check that the climate control indicator continues
blinking.

Page 1617 of 4500

LEXUS LS430 2003 Factory Owners Manual 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 t

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 1620 of 4500

LEXUS LS430 2003 Factory Owners Manual 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 C

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

LEXUS LS430 2003 Factory Owners Manual <0029004c004a0011000300150018001d00030026004b00480046004e004c0051004a0003003600480044005700030026004f004c00500044005700480003002600520051005700550052004f0003002600520051005700550052004f004f00480055000

<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 1624 of 4500

LEXUS LS430 2003 Factory Owners Manual 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 C

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

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