2003 LEXUS LS430 Factory Repair Manual

Page 2881 of 4500

LEXUS LS430 2003  Factory Repair Manual 1.INSPECT TRANSMISSION WIRE (SLU) 
a. Disconnect the transmission wire connector from the transmission.  
b. Measure the resistance according to the value(s) in the table below. 
Fig. 184: Identifying

Page 2882 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 185: Tester Condition Reference Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: Go to step 3  
OK: Go to next step  
2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) 
a. Connect t

Page 2883 of 4500

LEXUS LS430 2003  Factory Repair Manual Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Standard:  
TRANSMISSION WIRE - ECM - RESISTANCE TABLE 
d. Measure the resistance according to the value(s) in the table below.  
Standard (Check for short

Page 2884 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 188: Inspecting Shift Solenoid Valve (SLU) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE SHIFT SOLENOID VALVE (SLU)

Page 2885 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: REPAIR OR REPLACE TRANSMISSION WIRE (See step 5 on REPLACEMENT)
TRANSMISSION CONTROL SWITCH CIRCUIT 
CIRCUIT DESCRIPTION 
When moving the shift lever into the S position using the transmission con

Page 2886 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 189: Transmission Control Switch - Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH) 
a. Di

Page 2887 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 190: Identifying Transmission Control Switch Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Standard:

Page 2888 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 191: Transmission Control Switch Reference Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTRONIC CIRCUIT 
INSPECTION PROCEDURE )  
OK: Go