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Home >> Lexus >> 2009 >> GS 450h >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Diagnostic - Symptom Tests) >> Meter / Gauge System >> Fuel Gauge Malfunction >> Procedure

Fuel Gauge Malfunction: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (FUEL METER OPERATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power 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 

    OK: Go to next step 

  2. READ VALUE USING TECHSTREAM (FUEL INPUT) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power 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): 47
      Fuel gauge indicates (3/4): 92
      Fuel gauge indicates (1/2): 148
      Fuel gauge indicates (1/4): 187
      Fuel gauge indicates (E): 205      		 -

      OK

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

    NG → REPLACE COMBINATION METER 

    OK: Go to next step 

  3. INSPECT FUEL SENDER GAUGE (for Main) 
    Fig 1: Identifying V11 Fuel Sender Gauge Connector Terminals
    GTY150317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the V11 gauge connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage

      Tester Connection Condition Specified Condition
      V11-2 - V11-3 Power switch ON (ACC) or ON (IG) 10 to 14 V
    3. Remove the fuel sender gauge.
    4. Check that the float position is between E and F.
      Fig 2: Checking Float Position Between E And F
      GTY102035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Measure the resistance between the terminals 2 and 3 of connector.

      Standard resistance

      Float Level Float Position mm (in.) Specified Condition
      F 51.4 (2.02) to 57.4 (2.26) 6.5 to 8.5 Ω
      E 121.7 (4.79) to 127.7 (5.03) 237.6 to 242.6 Ω

    NG → REPLACE FUEL SENDER GAUGE 

    OK: Go to next step 

  4. INSPECT FUEL SENDER GAUGE (for Sub) 
    Fig 3: Identifying U9 Fuel Sender Gauge Connector Terminals
    GTY131559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the U9 gauge connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage

      Tester Connection Condition Specified Condition
      U9-2 - U9-1 Power switch ON (ACC) or ON (IG) 10 to 14 V
    3. Remove the fuel sender gauge.
    4. Check that the float position is between E and F.
      Fig 4: Checking Float Position Between E And F
      GTY108198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Measure the resistance between the terminals 2 and 3 of connector of the connector.

      Standard resistance

      Float Level Float Position mm (in.) Specified Condition
      F 69.9 (2.75) to 75.9 (2.99) 6.5 to 8.5 Ω
      E 103.1 (4.06) to 109.1 (4.30) 167.9 to 171.9 Ω

    NG → REPLACE FUEL SENDER GAUGE 

    OK: Go to next step 

  5. CHECK WIRE HARNESS (COMBINATION METER - FUEL SENDER GAUGE) 
    1. Disconnect the V11 fuel sender gauge connector.
      Fig 5: View Of V11 Fuel Sender Gauge And K31 Meter Connector Terminals
      GTY122577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the K31 meter connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      K31-34 (FR) - V11-2 Below 1 Ω
      K31-34 (FR) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK WIRE HARNESS (FUEL SENDER GAUGE - FUEL SENDER GAUGE) 
    1. Disconnect the U9 and V11 fuel sender gauge connectors.
      Fig 6: Identifying U9 And V11 Fuel Sender Gauge Connector Terminals
      GTY117685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      U9-1 - V11-3 Below 1 Ω
      V11-3 - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. CHECK WIRE HARNESS (COMBINATION METER - FUEL SENDER GAUGE) 
    1. Disconnect the V11 gauge connector.
      Fig 7: View Of V11 Gauge And K31 Meter Connector Terminals
      GTY141682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the K31 meter connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      K31-19 (FE) - U9-2 (FE) Below 1 Ω
      K31-19 (FE) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE COMBINATION METER 

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