ECD SYSTEM (w/ EGR Cooler Bypass Valve), 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 assembly, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.

A01KH0HE05
DTC No. DTC Detection Condition Trouble Area
P0500

Following conditions (a), (b), (c) and (d) met for 3 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 assembly

  • ECM

Following conditions (a), (b) and (c) met for 2 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

A01KI16E05

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and 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 assembly.

      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) Click here

    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 menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.

    4. While the vehicle is running, check the vehicle speed at an engine speed of 1,500 rpm or more.

      OK
      Same value as actual vehicle speed

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. INSPECT ECM (SPD SIGNAL)


    1. A01KEXZE01

      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 to ON.

      4. Measure the voltage of the E12 and E16 ECM connectors as the rear wheels are turned slowly.

        OK
        Tester Connection Specified Condition
        E16-30 (SPD) - E12-14 (E2) 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 Click here