LEXUS LS430 2003 Factory Repair Manual
Page 1801 of 4500
Fig. 58: Identifying Fuel Sender Gauge Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 1802 of 4500
Fig. 59: Identifying Float Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: GO TO NEXT STEP
5.CHECK HARNESS AND CONNECTOR (FUEL SENDER GAUGE ASSY - LUGGAGE ROOM
JUNCTION BLOCK ASSY) (SEE HOW TO PROCEED WITH TROUBLESHOOTING
)
a. Disconnect the F19, L13 and L14 connectors.
b. Measure the resistance according to the value (s) in the table below.
Standard
RESISTANCE SPECIFICATIONS
Tester ConnectionConditionSpecified Condition
L14-6 - F19-1AlwaysBelow 1 ohms
L14-4 - F19-2AlwaysBelow 1 ohms
L13-10 - F19-3AlwaysBelow 1 ohms
Page 1803 of 4500
F19-1 - Body groundAlways10 kohms or higher
F19-2 - Body groundAlways10 kohms or higher
F19-3 - Body groundAlways10 kohms or higher
Page 1804 of 4500
Page 1805 of 4500
Fig. 60: Identifying Fuel Sender Gauge Assy And Luggage Room Junction Block Assy Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: GO TO NEXT STEP
6.INSPECT FUEL SENDER GAUGE ASSY (SUB)
a. Measure the voltage according to the value (s) in the table below.
Standard
VOLTAGE SPECIFICATIONS
b. Remove the fuel sender gauge assy.
c. Connect the fuel sender gauge connector.
d. Check that the float position is between E and F.
e. Measure the voltage between the terminals 2 and 1 of connector according to the value (s) in the
table below.
Standard
VOLTAGE SPECIFICATIONS
Tester ConnectionConditionSpecified Condition
F20-1 - F20-3Ignition switch ACC or ONBelow 1 to 5 V
Float levelFloat position mm (in.)Voltage (V)
F1.4(0.06) +/- 3(0.12)4.5 to 4.75
1/2190.2(7.49) +/- 3(0.12)0.45 +/- 0.65
Warning195.7(7.70) +/- 3(0.12)0.20 to 0.45
Page 1806 of 4500
<0029004c004a0011000300190014001d0003002c0047004800510057004c0049005c004c0051004a0003002900580048004f00030036004800510047004800550003002a00440058004a004800030026005200510051004800460057005200550003002900
5500520051005700030039004c0048005a[
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 1807 of 4500
Fig. 62: Identifying Float Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE FUEL SENDER GAUGE ASSY (SUB)
OK: GO TO NEXT STEP
7.CHECK HARNESS AND CONNECTOR (FUEL SENDER GAUGE ASSY - LUGGAGE ROOM
JUNCTION BLOCK ASSY) (SEE HOW TO PROCEED WITH TROUBLESHOOTING
)
a. Disconnect the F20, L13 and 14 connectors.
b. Measure the resistance according to the value (s) in the table below.
Standard
RESISTANCE SPECIFICATIONS
Tester ConnectionConditionSpecified Condition
L14-7 - F19-1AlwaysBelow 1 ohms
L13-9 - F19-2AlwaysBelow 1 ohms
L14-15 - F19-3AlwaysBelow 1 ohms
Page 1808 of 4500
F20-1 - Body groundAlways10 kohms or higher
F20-2 - Body groundAlways10 kohms or higher
F20-3 - Body groundAlways10 kohms or higher
Page 1809 of 4500
Page 1810 of 4500
Fig. 63: Identifying Fuel Sender Gauge Assy And Luggage Room Junction Block Assy Connector
Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSY
WIRING DIAGRAM
Fig. 64: Water Temperature Receiver Gauge Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
HINT:
If there is an open or short in the engine coolant temperature sensor circuit, the ECM outputs DTCs. Perform
troubleshooting with the "SFI System 10-2".
1.PERFORM ACTIVE TEST BY HAND-HELD TESTER
a. Operate the hand-held tester according to the steps on the display and select the "ACTIVE TEST".
METER:
ACTIVE TEST REFERENCE