2003 LEXUS LS430 Factory Repair Manual

Page 1841 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 86: Identifying Terminal C12-19 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: GO TO NEXT STEP

Page 1842 of 4500

LEXUS LS430 2003  Factory Repair Manual 7.REPLACE DRIVER SIDE JUNCTION BLOCK 
OK:  
Normal operation  
NG: REPLACE COMBINATION METER ASSY (SEE OVERHAUL
 )  
OK: END  
1.INSPECT SPEEDOMETER 
a. Check the operation.  
b. Using a speedometer t

Page 1843 of 4500

LEXUS LS430 2003  Factory Repair Manual c. Check the deflection width of the speedometer indicator.  
Reference: Below 0.5 km/h (0.3 mph)  
2.INSPECT OUTPUT OF VEHICLE SPEED 
a. Check the output signal waveform.  
1. Remove the combination

Page 1844 of 4500

LEXUS LS430 2003  Factory Repair Manual OK:  
As shown in the illustration  
HINT: 
As vehicle speed increases, the cycle of the signal waveform narrows. 
Fig. 88: Identifying Signal Waveform
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 1845 of 4500

LEXUS LS430 2003  Factory Repair Manual c. Compare the result of the test with the standard indication.  
DC 13.5 V, 25°C (77°F)  
Fig. 89: Tachometer Acceptable Reference Chart
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
4.INSPECT FU

Page 1846 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 90: Identifying Fuel Sender Gauge Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK:  
Needle position is on (FULL).  
5.INSPECT FUEL LEVEL WARNING 
a. Disconnect the connecto

Page 1847 of 4500

LEXUS LS430 2003  Factory Repair Manual 6.INSPECT LOW OIL PRESSURE WARNING LIGHT 
a. Disconnect the connector from the low oil pressure switch.  
b. Turn the ignition switch to the ON position.  
c. Ground the terminal of the wire harness s

Page 1848 of 4500

LEXUS LS430 2003  Factory Repair Manual Standard:  
Float down (switch on): Below 1 ohms  
f. Pour the fluid back in the reservoir tank.  
9.INSPECT WASHER LEVEL WARNING SWITCH 
a. Disconnect the connector from the washer level warning swit