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СИСТЕМА SFI, Diagnostic DTC:P0500

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DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"
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DESCRIPTION

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of this pulse signal.

DTC No. DTC Detection Condition Trouble Area
P0500 While the vehicle is being driven, no vehicle speed signal is transmitted to the ECM (2 trip detection logic).

  • Open or short in speed signal circuit

  • Wheel speed sensor

  • Combination meter assembly

  • ECM

  • Skid control ECU
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MONITOR DESCRIPTION

The ECM assumes that the vehicle is being driven when the vehicle speed measured by the output speed sensor (SP2) is more than 9 km/h (5.6 mph). If there is no speed signal from the combination meter despite this condition being met, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.

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CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on [A].

  6. Start the engine.

  7. Drive the vehicle at 24 km/h (15 mph) or more for a total of 30 seconds or more [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  8. Stop the vehicle.

  9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].

  10. Read the pending DTCs.

    Tip:

    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0500.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    Tip:

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Tip:

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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PROCEDURE


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    CHECK OPERATION OF SPEEDOMETER


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

      Tip:

      • 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 (Click here).


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    READ VALUE USING GTS (VEHICLE SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.

    5. Drive the vehicle.

    6. Read the value displayed on the GTS.

      OK
      Vehicle speeds displayed on GTS and speedometer display are equal.

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    CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the combination meter connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E77-6 (+S) - A53-13 (SPD) Always Below 1 Ω
      E77-6 (+S) or A53-13 (SPD) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the combination meter connector.


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    CHECK COMBINATION METER (+S VOLTAGE)


    1. A01ENIYE80

      Disconnect the combination meter connector.

      Tip:

      Disconnect the ECU connectors on the other systems related to the speed signal (but the ECM connectors must be connected).

    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
      E77-6 (+S) - Body ground Engine switch on (IG) 4.5 to 5.5 V
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter)

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    CHECK COMBINATION METER (SPD SIGNAL OUTPUT WAVEFORM))


    1. A01EO42E22

      Disconnect the combination meter connector.

    2. Move the shift lever to the neutral position.

    3. Move the shift lever to the neutral position.

    4. Jack up one of the rear wheels.

    5. Turn the engine switch on (IG).

    6. Check the voltage between the terminal of the combination meter and the body ground while the rear wheel is turned slowly.

      Tester Connection Condition Specified Condition
      E77-6 (+S) - Body ground

      • Engine switch on (IG)

      • Wheel turned slowly

      		 Voltage generated intermittently
      Table 2. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Combination Meter)

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    CHECK FOR COMBINATION METER ASSEMBLY (SPD SIGNAL INPUT WAVEFORM)


    1. A01EQWCE16

      Disconnect the combination meter connector.

    2. Move the shift lever to the neutral position.

    3. Move the shift lever to the neutral position.

    4. Jack up one of the rear wheels.

    5. Turn the engine switch on (IG).

    6. Check the voltage between the terminal of the combination meter and the body ground while the rear wheel is turned slowly.

      Tester Connection Condition Specified Condition
      E77-5 (SI) - Body ground

      • Engine switch on (IG)

      • Wheel turned slowly

      		 Voltage generated intermittently
      Table 3. Text in Illustration
      *a

      Rear view of wire harness connector

      (to Combination Meter)

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    CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU)


    1. Disconnect the combination meter connector.

    2. Disconnect the skid control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E77-5 (SI) - A24-12 (SP1) Always Below 1 Ω
      E77-5 (SI) or A24-12 (SP1) - Body ground Always 10 kΩ or higher

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    GO TO MALFUNCTION IN SPEEDOMETERClick here

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    CHECK FOR INTERMITTENT PROBLEMSClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE ECMClick here

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    REPLACE COMBINATION METERClick here

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    REPLACE MASTER CYLINDER SOLENOID

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    REPAIR OR REPLACE HARNESS OR CONNECTOR