Toyota 4Runner manuals

Toyota 4Runner: Fuel Receiver Gauge Malfunction

DESCRIPTION

  • The fuel sender gauge has a variable resistance mechanism. The resistance decreases when the fuel amount increases, and the resistance increases when the fuel amount decreases. The fuel receiver gauge changes based on the resistance of the fuel sender gauge.

NOTICE:

When the combination meter is removed or replaced, its connector is disconnected or fuel is added, the fuel receiver gauge display will return to normal within a maximum of 16 minutes after the ignition switch is turned to ON or when vehicle speed is input.

WIRING DIAGRAM


PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output (See page ).


Result

Result

Proceed to

CAN communication DTC is not output

A

CAN communication DTC is output

B


B

GO TO CAN COMMUNICATION SYSTEM


A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (FUEL METER OPERATION)

(a) Use the Active Test to check the operation of the fuel receiver gauge (See page ).


Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Fuel Meter Operation

Fuel receiver gauge

Empty, 1/2, Full

Confirm that the vehicle is stopped with the engine idling.

OK:

Fuel receiver gauge indication is normal.


NG

REPLACE COMBINATION METER ASSEMBLY


OK

3.

READ VALUE USING TECHSTREAM (FUEL INPUT)

(a) Use the Data List to check if the fuel receiver gauge is operating properly (See page ).


Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Fuel Input

Fuel input signal/Min.: 0, Max.: 127.5

Current fuel level displayed

Unit: Liters

OK:

Fuel level signal displayed on the Techstream is almost the same as fuel receiver gauge indication.


NG

REPLACE COMBINATION METER ASSEMBLY


OK

4.

CHECK HARNESS AND CONNECTOR (COMBINATION METER - FUEL SUCTION WITH PUMP AND BODY GROUND)

(a) Disconnect the F14 meter connector.

(b) Disconnect the Q5 gauge connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F14-40 (L) - Q5-2 (FS)

Always

Below 1 Ω

F14-19 (E3) - Q5-3 (FE)

Always

Below 1 Ω

F14-40 (L) - Body ground

Always

10 kΩ or higher

F14-19 (E3) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

INSPECT FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY


(a) Remove the fuel suction with pump and gauge tube assembly (See page ).


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A-2 (FS) - B-2

Always

Below 1 Ω

A-3 (FE) - B-3

Text in Illustration

*a

Front view of wire harness connector

(to Fuel Sender Gauge Assembly)

*b

Lower Side (to Fuel Sender Gauge Assembly)

*c

Connector A

*d

Connector B


NG

REPLACE FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY


OK

6.

INSPECT FUEL SENDER GAUGE ASSEMBLY

(a) Remove the fuel sender gauge assembly (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 - 3

Float level F (upper)

12 to 18 Ω

Float level E (lower)

405 to 415 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Fuel Sender Gauge Assembly)

*b

Float level F (upper)

*c

Float level E (lower)


OK

REPLACE COMBINATION METER ASSEMBLY


NG

REPLACE FUEL SENDER GAUGE ASSEMBLY

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