Fuel Receiver Gauge Malfunction

METER / GAUGE SYSTEM: Fuel Receiver Gauge Malfunction

Fuel Receiver Gauge Malfunction

DESCRIPTION

- The meter CPU uses the fuel sender gauge assembly to determine the level of the fuel in the fuel tank. The resistance of the fuel sender gauge will vary between approximately 15 Ohms with the float at the full position, and 410 Ohms with the float at the empty position. The meter outputs battery voltage through two 820 Ohms resistors that are mounted in parallel inside the meter ECU. The meter CPU measures the voltage between the variable resistor in the fuel sender gauge and the two resistors mounted in parallel in the meter. Voltage measured at this point will vary as the float of the fuel sender gauge is moved. The highest voltage observed should be approximately half of battery voltage.

HINT: The fuel level warning light will come on when the fuel level is below 10.5 liters.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST BY TECHSTREAM (FUEL METER OPERATION)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Enter following menus: Body Electrical / Combination Meter / Active Test.
(e) Check the operation by referring to the table below.

Combination Meter:





OK:
Needle indication is normal.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
2. READ VALUE OF TECHSTREAM (FUEL INPUT)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Check the values by referring to the table below.

Combination Meter:





*1: for 2AZ-FE
*2: for 3MZ-FE
OK:
Fuel value signal displayed on the tester is almost the same as the needle indication.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - FUEL SENDER GAUGE ASSEMBLY)





(a) Disconnect the C7 and F8 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT FUEL SENDER GAUGE ASSEMBLY





(a) Disconnect the fuel sender gauge connector.
(b) Remove the fuel sender gauge assembly.
(c) Check that the float moves smoothly between F and E.
(d) Measure the resistance between terminals 2 (FE) and 3 (FS) of the connector according to the value(s) in the table below.
Standard resistance:





NG -- REPLACE FUEL SENDER GAUGE ASSEMBLY
OK -- END