2003 LEXUS LS430 Factory Repair Manual

Page 1673 of 4500

LEXUS LS430 2003  Factory Repair Manual b. Measure the voltage of the wire harness side connectors.  
Standard:  
TESTER CONNECTION AND SPECIFIED CONDITION 
Tester ConnectionConditionSpecified Condition
DA-1 - Body groundAlways10 to 14 V
DF

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LEXUS LS430 2003  Factory Repair Manual Fig. 55: Identifying DA And DF Driver Side J/B Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

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LEXUS LS430 2003  Factory Repair Manual OK: Go to next step  
6.CHECK WIRE HARNESS (DRIVER SIDE J/B - BODY GROUND) 
a. Disconnect the DG J/B connector.  
b. Measure the resistance of the wire harness side connector.  
Standard:  
TESTER CON

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LEXUS LS430 2003  Factory Repair Manual NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step  
7.INSPECT RELAY (Marking: D-IG1) 
a. Remove the D-IG1 relay from the driver side J/B.  
b. Measure the resistance of the relay.  
Stan

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LEXUS LS430 2003  Factory Repair Manual CIRCUIT DESCRIPTION 
If the climate control seat does not operate, the seat climate control blower (climate control ECU) or the wire 
harness may be malfunctioning. 
WIRE DIAGRAM 
Fig. 58: Climate Con

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LEXUS LS430 2003  Factory Repair Manual Fig. 59: Identifying Seat Climate Control Blower Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR  
OK: Go to next step  
3.CHECK WIRE HAR

Page 1679 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 60: Identifying Seat Climate Control Blower Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR  
OK: REPLACE SEAT CLIMATE CONTROL BLOWE

Page 1680 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 61: Identifying PJ Passenger Side J/B Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: Go to step 5  
OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (PASSENGER SIDE J/B - 
CLIM