2003 LEXUS LS430 Factory Repair Manual

Page 2809 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 117: Inspecting Shift Solenoid Valve (S4) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE SHIFT SOLENOID VALVE (S4)  
OK: Go to next step  
4.INSPECT SHIFT SOLENOID VALVE (SL2) 
a. Rem

Page 2810 of 4500

LEXUS LS430 2003  Factory Repair Manual The solenoid makes an operating noise.
Fig. 118: Inspecting Shift Solenoid Valve (SL2)
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 2811 of 4500

LEXUS LS430 2003  Factory Repair Manual NG: REPLACE SHIFT SOLENOID VALVE (SL2)
OK: Go to next step  
5.INSPECT TRANSMISSION VALVE BODY ASSY (See chapter 2 in PROBLEM SYMPTOMS 
TABLE ) 
OK:  
There are no foreign objects on each valve and th

Page 2812 of 4500

LEXUS LS430 2003  Factory Repair Manual This DTC indicates an open or short in the shift solenoid valve SL2 circuit. The ECM commands gear shifts by 
turning the shift solenoid valves "ON/OFF". When there is an open or short circuit

Page 2813 of 4500

LEXUS LS430 2003  Factory Repair Manual COMPONENT OPERATING RANGE 
COMPONENT OPERATING RANGE TABLE 
WIRING DIAGRAM 
Fig. 120: DTC P0778 - Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
HINT: 
The shift s

Page 2814 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 121: Identifying Transmission Wire Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Standard:  
TRANSMISSION WIRE (SL2) - RESISTANCE TABLE 
c. Measure the resistance according t

Page 2815 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 122: Tester Connection 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

Page 2816 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