Meter / Gauge System Fuel Receiver Gauge Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING TECHSTREAM (FUEL METER OPERATION)

READ VALUE USING TECHSTREAM (FUEL INPUT)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - FUEL SENDER GAUGE ASSEMBLY)

INSPECT FUEL SENDER GAUGE ASSEMBLY

DESCRIPTION

1. 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 15.0 Ω with the float at the full position, and 410.0 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 battery voltage.
   

HINT:

The fuel level warning light will come on when the fuel level is below 7.5 liters (2.0 gallons).

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

4. Enter following menus: Body Electrical / Combination Meter / Active Test.
   

5. Check the operation by referring to the table below.
   
   

   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, engine idling

   OK:

   Gauge indication is normal.
   

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

4. Enter following menus: Body Electrical / Combination Meter / Data List.
   

5. Check the values by referring to the table below.
   
   

   Combination Meter

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Fuel Input	Fuel input signal Min.: 0, Max.: 127.5	Fuel gauge indicates (E): 5.5 (L)	-
   		Fuel gauge indicates (1/2): 27.5 (L)
   		Fuel gauge indicates (F): 49.5 (L)

   OK:

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

1. Disconnect the E46 and L17 connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E46-10 (E) - L17-3 (FE)	Always	Below 1 Ω
   L17-3 (FE) - Body ground	Always	10 kΩ or higher
   E46-25 (L) - L17-2 (FS)	Always	Below 1 Ω
   E46-25 (L) - Body ground	Always	10 kΩ or higher

1. Remove the fuel sender gauge assembly.
   

2. Check that the float moves smoothly between E and F.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L17-2 (FS) - L17-3 (FE)	Float level is F (upper)	13.5 to 16.5 Ω
   L17-2 (FS) - L17-3 (FE)	Float level is between F (upper) and E (lower)	13.5 to 414.5 Ω (Gradually changes)
   L17-2 (FS) - L17-3 (FE)	Float level is E (lower)	405.5 to 414.5 Ω

   Result:

   Result	Proceed to
   OK	A
   NG (for 2AZ-FE)	B
   NG (for 2ZR-FE)	C