2003 LEXUS LS430 Factory Repair Manual

Page 3953 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 29: Identifying Lumbar Support Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE LUMBAR SUPPORT SWITCH  
OK: GO TO NEXT STEP  
2.INSPECT POWER SEAT MOTOR (SEE I

Page 3954 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 30: Identifying P23 Lumbar Support Switch Connector Terminals And P30,P31 Power Seat 
Motor Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR AND REPLACE HARNESS AND C

Page 3955 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
CIRCUIT DESCRIPTION 
Pressing the seat cushion switch activates the seat cushion motor. 
WIRING DIAGRAM 
Fig. 31: Power Seat C

Page 3956 of 4500

LEXUS LS430 2003  Factory Repair Manual Tester ConnectionSwitch ConditionSpecified Condition
1 (CSNF) - 4 (E)FRONTBelow 1 ohms
1 (CSNF) - 4 (E), 2 (CSNR) - 4 (E)OFF10 kohms or higher
2 (CSNR) - 4 (E)REARBelow 1 ohms

Page 3957 of 4500

LEXUS LS430 2003  Factory Repair Manual

Page 3958 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 32: Identifying Power Seat Cushion Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE POWER SEAT CUSHION SWITCH  
OK: GO TO NEXT STEP  
2.CHECK WIRE HARNESS (POW

Page 3959 of 4500

LEXUS LS430 2003  Factory Repair Manual <0029004c004a0011000300160016001d0003002c0047004800510057004c0049005c004c0051004a0003003300150015000300330052005a00480055000300360048004400570003002600520051005700550052004f00030036005a004c00570046004

Page 3960 of 4500

LEXUS LS430 2003  Factory Repair Manual OK:  
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
  
CIRCUIT DESCRIPTION 
The driver door ECU detects the condition of the driving memory switch, and sends the information to th