Toyota Tacoma 2015-2018 Service Manual: 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 13.5 Ω with the float at the full position, and 414.5 Ω with the float at the empty position. The meter outputs battery voltage through two 820 Ω resistors that are mounted in parallel inside the meter CPU. 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 the battery voltage.

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) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter

Tester Display	Test part	Control Range	Diagnostic Note
Fuel Meter Operation	Fuel receiver gauge	OFF, Sender E, Empty, Warning, 1/4, 1/2, 3/4, Full, Sender F	Operate with IG ON and the vehicle is stopped.

OK:

Fuel receiver gauge indication is normal.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.	READ VALUE USING TECHSTREAM (FUEL INPUT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

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: Liter

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 ASSEMBLY - FUEL SUCTION WITH PUMP AND GAUGE TUBE ASSEMBLY)

(a) Disconnect the C9 combination meter assembly connector.

(b) Disconnect the F19*1 or F44*2 fuel suction with pump and gauge tube assembly connector.

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

Standard Resistance:

for 2TR-FE

Tester Connection	Condition	Specified Condition
C9-21 (L) - F19-2	Always	Below 1 Ω
C9-21 (L) or F19-2 - Body ground	Always	10 kΩ or higher
C9-23 (E3) - F19-3	Always	Below 1 Ω
C9-23 (E3) or F19-3 - Body ground	Always	10 kΩ or higher

for 2GR-FKS

Tester Connection	Condition	Specified Condition
C9-21 (L) - F44-2	Always	Below 1 Ω
C9-21 (L) or F44-2 - Body ground	Always	10 kΩ or higher
C9-23 (E3) - F44-3	Always	Below 1 Ω
C9-23 (E3) or F44-3 - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.	INSPECT FUEL SENDER GAUGE ASSEMBLY

(a) Remove the fuel sender gauge assembly.

(b) Inspect the fuel sender gauge assembly.

Text in Illustration

*a

Component without harness connected (Fuel Sender Gauge Assembly)

-

-

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

Standard Resistance:

for: 2TR-FE

Tester Connection	Float Level	Float Position (mm (in.))	Specified Condition
1 - 2	F	181.9 to 193.9 (7.161 to 7.633)	3.0 to 5.0 Ω
	1/2	90.9 to 102.9 (3.578 to 4.051)	55.6 to 62.4 Ω
	E	0 (0)	109.0 to 111.0 Ω

for: 2GR-FKS

Tester Connection	Float Level	Float Position (mm (in.))	Specified Condition
1 - 2	F	181.9 to 193.9 (7.161 to 7.633)	13.5 to 16.5 Ω
	1/2	90.9 to 102.9 (3.578 to 4.051)	201.0 to 224.0 Ω
	E	0 (0)	405.5 to 414.5 Ω

Result

Result	Proceed to
OK	A
NG (for 2TR-FE)	B
NG (for 2GR-FKS)	C

B

REPLACE FUEL SENDER GAUGE ASSEMBLY (for 2TR-FE)

C

REPLACE FUEL SENDER GAUGE ASSEMBLY (for 2GR-FKS)

A

6.	INSPECT FUEL SUCTION PUMP AND GAUGE TUBE ASSEMBLY

(a) Remove the fuel suction pump and gauge tube assembly. for 2TR-FE: (See page ) for 2GR-FKS: (See page )

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-2 - B-2	Always	Below 1 Ω
A-3 - B-1

Text in Illustration

*a	Component without harness connected (Fuel Suction with Pump and Gauge Tube Assembly)

Result

Result	Proceed to
OK	A
NG (for 2TR-FE)	B
NG (for 2GR-FKS)	C

A

REPLACE COMBINATION METER ASSEMBLY

B

REPLACE FUEL SUCTION PUMP AND GAUGE TUBE ASSEMBLY (for 2TR-FE)

C

REPLACE FUEL SUCTION PUMP AND GAUGE TUBE ASSEMBLY (for 2GR-FKS)