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Home >> Lexus >> 2017 >> LS 460 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (P0300-P1367) >> SFI System >> DTC P0500: Vehicle Speed Sensor [09/2015 - ] >> Procedure

DTC P0500: Vehicle Speed Sensor [09/2015 - ]: Procedure

  1. CHECK OPERATION OF SPEEDOMETER 
    1. Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal.

      HINT: 

      • The vehicle speed sensor is operating normally if the speedometer reading is normal.
      • If the speedometer does not operate, check it by following the procedure described in speedometer malfunction (Refer to Speedometer Malfunction [09/2015 - ] ).

    Result:  NG

    NG 

    GO TO MALFUNCTION IN SPEEDOMETER 

    (Refer to Speedometer Malfunction [09/2015 - ] )

    Result:  OK

    OK 

    See step  2

  2. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed.
    5. Drive the vehicle.
    6. Read the value displayed on the tester.

      OK

      Vehicle speeds displayed on tester and speedometer display are equal.

    Result:  OK

    OK 

    CHECK FOR INTERMITTENT PROBLEMS 

    (Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2015 - ] )

    Result:  NG

    NG 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) 
    1. Disconnect the L10 combination meter connector.
      GTY674133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A14 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Condition Specified Condition
      L10-10 (+S) - A14-24 (SPD) Always Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Condition Specified Condition
      L10-10 (+S) or A14-24 (SPD) - Body ground Always 10 kΩ or higher

      HINT: 

      If the wire has a short, check the speed signal circuit in other systems related to the vehicle speed signal (e.g. the navigation system, audio system, etc.).

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FOR OTHER SYSTEMS RELATED TO SPEED SIGNAL) 

    Result:  OK

    OK 

    See step  4

  4. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE) 
    1. Disconnect the L10 combination meter connector.
      GTY655519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      L10-10 (+S) - Body ground Engine switch on (IG) 4.5 to 14 V

    Result:  NG

    NG 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  OK

    OK 

    See step  5

  5. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL OUTPUT WAVEFORM) 
    1. Move the shift lever to N.
      GTY623403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Jack up the vehicle.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      L10-10 (+S) - Body ground
      • Engine switch on (IG)
      • Wheel turned slowly
      		 Voltage generated intermittently

      HINT: 

      The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.

    Result:  OK

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    See step  6

  6. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL INPUT WAVEFORM) 
    1. Move the shift lever to N.
      GTY629143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Jack up the vehicle.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      L10-9 (SI) - Body ground
      • Engine switch on (IG)
      • Wheel turned slowly
      		 Voltage generated intermittently

      HINT: 

      The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.

    Result:  OK

    OK 

    REPLACE NO. 1 METER ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU) 
    1. Disconnect the L10 combination meter connector.
      GTY628493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A19 skid control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Condition Specified Condition
      L10-9 (SI) - A19-23 (SP1) Always Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Condition Specified Condition
      L10-9 (SI) or A19-23 (SP1) - Body ground Always 10 kΩ or higher

    Result:  OK

    OK 

    REPLACE SKID CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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