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Home >> Lexus >> 2012 >> IS 250 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter & Gauge System (Diagnostics & Symptom Tests) >> Meter / Gauge System >> Symptom Tests >> Fuel Receiver Gauge Malfunction >> Procedure

Fuel Receiver Gauge Malfunction: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    B → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

    A: Go to next step 

  2. CHECK MULTIPLEX COMMUNICATION SYSTEM 
    1. Check if MULTIPLEX communication DTC is output. Refer to DTC CHECK / CLEAR .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    B → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

    A: Go to next step 

  3. PERFORM ACTIVE TEST USING TECHSTREAM (FUEL METER OPERATION) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the tester 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 -

      OK

      Needle indication is normal.

    NG → REPLACE COMBINATION METER ASSEMBLY 

    OK: Go to next step 

  4. READ VALUE USING TECHSTREAM (FUEL INPUT) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the tester 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.: 255 Fuel gauge indicates (F): 35
      Fuel gauge indicates (1/2): 145
      Fuel gauge indicates (E): 205      		 -

      OK

      Fuel value signal displayed on the tester is almost the same as needle indication.

    NG → See step   5 

    OK → REPLACE COMBINATION METER ASSEMBLY 

  5. INSPECT FUEL SENDER GAUGE ASSEMBLY 
    1. Disconnect the connectors from the fuel sender gauges.
      Fig 1: Identifying Fuel Sender Gauge Assembly Connector Terminals
      GTY129443Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance: Fuel sender gauge (Main)

      Tester Connection Condition Specified Condition
      Q14-2 (S) - Q14-3 (FE) Always 6.5 to 242.6 Ω

      Standard resistance: Fuel sender gauge (Sub)

      Tester Connection Condition Specified Condition
      P10-1 (FS) - P10-2 (E) Always 6.5 to 171.9 Ω

    NG → REPLACE FUEL SENDER GAUGE ASSEMBLY 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - FUEL SENDER GAUGE ASSEMBLY) 
    1. Disconnect the fuel tank wires from the fuel sender gauge assembly.
      Fig 2: Identifying Combination Meter Assembly - Fuel Sender Gauge Assembly Connector Terminals
      GTY137493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      J34-19 (FR) - Q14-2 (S) Always Below 1 Ω
      Q14-3 (FE) - P10-1 (FS) Always Below 1 Ω
      P10-2 (E) - J34-2 (FE) Always Below 1 Ω
      Q14-2 (S) - Body ground Always 10 kΩ or higher
      P10-1 (FS) - Body ground Always 10 kΩ or higher
      J34-2 (FE) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. INSPECT FUEL SENDER GAUGE ASSEMBLY 
    1. Disconnect the fuel sender gauge connector.
      Fig 3: Identifying Fuel Sender Gauge Assembly Terminals And Float
      GTY129659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the fuel sender gauge assembly (main).
      1. Remove the fuel sender gauge assembly (main).
      2. Check that the float moves smoothly between F and E.
      3. Measure the resistance between the terminals 2 (S) and 3 (FE) of connector according to the value(s) in the table below.

        Standard resistance

        Main 

        Float Level Resistance (Ω)
        F 6.5 to 8.5
        Between E and F 6.5 to 242.6 (Gradually changes)
        E 237.6 to 242.6
    3. Inspect the fuel sender gauge assembly (sub).
      1. Remove the fuel sender gauge assembly (sub).
      2. Check that the float moves smoothly between F and E.
      3. Measure the resistance between the terminals 1 (FS) and 2 (E) according to the value(s) in the table below.

        Standard resistance

        Sub 

        Float Level Resistance (Ω)
        F 6.5 to 8.5
        Between E and F 6.5 to 171.9 (Gradually changes)
        E 167.9 to 171.9

    NG → REPLACE FUEL SENDER GAUGE ASSEMBLY 

    OK: Go to next step 

  8. REPLACE COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly to a new one or a known normal one.

      OK

      The operation of the combination meter assembly returns to normal.

    NG → REPLACE ECM 

    OK → END 

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