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ECD SYSTEM (for DPF), Diagnostic DTC:P0500

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

The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Table 1. P0500
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Drive the vehicle at 10 km/h (6.3 mph) or more

Conditions (a), (b), (c) and (d) are met for 8 seconds or more (2 trip detection logic):

(a) Engine coolant temperature is higher than 70°C (158°F).

(b) engine speed is 1500 to 4000 rpm

(c) Injection volume is 19 mm3/st or more.

(d) No speed signal is input to the ECM.

  • Open or short in speedometer circuit

  • Speedometer assembly

  • ECM
Drive the vehicle at 10 km/h (6.3 mph) or more

Conditions (a) and (b) are met for 6 seconds or more (2 trip detection logic):

(a) During the fuel-cut operation.

(b) No speed signal is input to the ECM.
Table 2. Related Data List
DTC No. Data List
P0500 Vehicle Speed
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

Tip:

Read freeze frame data using the intelligent tester. 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, and other data from the time the malfunction occurred.

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PROCEDURE


  1. Click here

    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.

      OK
      The vehicle speed sensor is operating normally.

  2. Click here

    READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and start the engine.

    3. Turn the tester on.

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

  3. Click here

    CHECK HARNESS AND CONNECTOR


    1. Disconnect the combination meter connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H62-3 (+S) - Body ground Ignition switch ON 4.5 to 5.5 V
      Table 3. Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter)

    3. Reconnect the combination meter connector.


  4. Click here

    CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)


    1. Move the shift lever to neutral.

    2. Jack up the vehicle.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H62-3 (+S) - Body ground Ignition switch ON Voltage generated intermittently
      Table 4. Text in Illustration
      *a

      Component without harness connected

      (Combination Meter)
      Tip:

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

      Table 5. Result
      Result Proceed to
      OK A
      NG B

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    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)


    1. Disconnect the combination meter connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H62-3 (+S) - A51-14 (SPD) Always Below 1 Ω
      H62-3 (+S) or A51-14 (SPD) - Body ground Always 10 kΩ or higher
      Table 6. Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter)
      *b

      Front view of wire harness connector

      (to ECM)

    4. Reconnect the combination meter connector.

    5. Reconnect the ECM connector.


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    REPLACE ECM


    1. Replace the ECM (Click here).


  7. Click here

    CHECK SPEEDOMETER CIRCUIT


    1. Check the speedometer circuit (Click here).

      Tip:

      Inspect the brake actuator assembly and speed sensor.


  8. Click here

    REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter (Click here).


  9. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


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    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs (Click here).

    3. Turn the ignition switch off.

    4. Start the engine.

    5. Drive the vehicle at 10 km/h (6.3 mph) or more.

    6. Enter the following menus: Powertrain / Engine and ECT / DTC.

    7. Confirm that the pending DTC is not output again.


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    END