ECD SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

The vehicle speed sensor outputs a 4-pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.

A01KH0HE01
DTC No. DTC Detection Condition Trouble Area
P0500

Following conditions (a), (b), (c) and (d) met for 8 seconds or more:

(2 trip detection logic)


  • (a) Engine coolant temperature is more than 70°C (158°F)

  • (b) Engine speed is between 1,500 rpm and 4,000 rpm

  • (c) No speed signal is input to ECM

  • Open or short in speed sensor circuit

  • Vehicle speed sensor

  • Combination meter

  • ECM

Following conditions (a), (b) and (c) met for 5.4 seconds or more:

(2 trip detection logic)


  • (a) Vehicle running

  • (b) Under fuel-cut operation

  • (c) No speed signal is input to ECM

WIRING DIAGRAM

A01KI16E01

INSPECTION PROCEDURE

Note

If the ECM is replaced, the new ECM needs initialization Click here.

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK COMBINATION METER ASSEMBLY (OPERATION OF SPEEDOMETER)


    1. Drive the vehicle.

    2. Check the speedometer reading in the combination meter.

      Tech Tips

      If the vehicle speed sensor signal is inaccurate, the speedometer will show abnormal readings.

      OK
      Speedometer operates normally.

    NG

    CHECK SPEEDOMETER CIRCUIT (INCLUDING SPEED SENSOR)

    OK

  2. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the tester ON.

    3. Select the following menu items: Powertrain / Engine / Data List / Vehicle Speed.

    4. While the vehicle is running, check the vehicle speed at an engine speed of 2,000 rpm or more.

      OK
      Same value as actual vehicle speed.

    OK

    CHECK FOR INTERMITTENT PROBLEMS

    NG

  3. INSPECT ECM (SPD SIGNAL)


    1. A01KGKKE18
      Text in Illustration
      *1 ECM Connector

      While idling the engine, check the waveform of the ECM connectors using an oscilloscope.


      1. Shift the lever to the neutral position.

      2. Jack up the vehicle.

      3. Turn the ignition switch ON.

      4. Measure the voltage of the ECM connectors as the rear wheels are turned slowly.

        OK
        Tester Connection Specified Condition
        E8-17 (SPD) - E5-7 (E1) Correct waveform is as shown
        Tool Setting Condition
        5 V/DIV., 20 msec./DIV. Turn the rear wheel slowly

        Tech Tips

        When the wheel is turning slowly, voltage is output intermittently.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM