2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual Fig. 132: Measuring Line Pressure With SST 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
ITEM DIAGNOSTIC NOTE CHART

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LEXUS LS430 2003  Factory Repair Manual NG: REPLACE SHIFT SOLENOID VALVE SLT  
OK: GO TO NEXT STEP  
4.CLEAR THE DTC AND RUNNING TEST 
a. Clear the DTC, and check DTC again after conducting the "MONITOR DRIVE PATTERN FOR 
ECT TEST"

Page 2827 of 4500

LEXUS LS430 2003  Factory Repair Manual Shifting from 1st to 6th is performed in combination with "ON" and "OFF" operation of the shift solenoid 
valves SL1, SL2, S1, S2, S3, S4 and SR which is controlled by the ECM. If an o

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LEXUS LS430 2003  Factory Repair Manual P0974: Range check (High resistance)  
TYPICAL ENABLING CONDITIONS TABLE - P0974 
TYPICAL MALFUNCTION THRESHOLDS 
P0973: Range check (Low resistance)  
TYPICAL MALFUNCTION THRESHOLDS - P0973 
P0974: R

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LEXUS LS430 2003  Factory Repair Manual 1.INSPECT TRANSMISSION WIRE (S1) 
a. Disconnect the transmission wire connector from the transmission.  
b. Measure the resistance according to the value(s) in the table below. 
Fig. 135: Identifying

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LEXUS LS430 2003  Factory Repair Manual c. Measure the resistance according to the value(s) in the table below. 
Fig. 136: Disconnecting Connector From ECM
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Standard:  
TRANSMISSION WIRE - ECM

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LEXUS LS430 2003  Factory Repair Manual SHIFT SOLENOID VALVE (S1) - RESISTANCE TABLE
c. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid 
body.  
OK:  
The solenoid makes an operating noise.

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LEXUS LS430 2003  Factory Repair Manual CIRCUIT DESCRIPTION 
Shifting from 1st to 6th is performed in combination with "ON" and "OFF" operation of the shift solenoid 
valves SL1, SL2, S1, S2, S3, S4 and SR which is controlle