Inspection [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL SENDER GAUGE ASSEMBLY

WARNING:

Perform the inspection in a well-ventilated area.

Do not perform the inspection near an open flame.

Check that the float moves smoothly between F and E.

Check the fuel sender gauge assembly voltage.

Apply 5 V between terminals 2 and 3.

NOTE:

Be careful when connecting the leads, as the fuel sender gauge assembly may be damaged if the leads are connected to the wrong terminals.
Do not apply more than 6 V to terminals 2 or 3.

HINT:

If a stable power supply is not available, connect 4 nickel-metal hydride batteries (1.2 V each) or equivalent in series.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component without harness connected (Fuel Sender Gauge Assembly)
*b	Voltage Applied between Terminals

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Float Level	Specified Condition
1 - 2	F	4.255 to 4.605 V
1 - 2	Between F and E	0.345 to 4.605 V
1 - 2	E	0.345 to 0.695 V

HINT:

The output voltage changes depending on the voltage applied to the terminals.

Output voltage (F) = (0.851 x Voltage applied to terminals) to (0.921 x Voltage applied to terminals)

Output voltage (E) = (0.069 x Voltage applied to terminals) to (0.139 x Voltage applied to terminals)

If the result is not as specified, replace the fuel sender gauge assembly.

*a	Component without harness connected (Fuel Sender Gauge Assembly)