SFI SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

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 4-pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.

A0160L5E38
DTC No. DTC Detection Condition Trouble Area
P0500 While vehicle being driven, no vehicle speed sensor signal to ECM. (1-trip detection logic)

  • Open or short in speed signal circuit

  • Combination meter

  • ECM

  • Skid control ECU

MONITOR DESCRIPTION

The ECM assumes that the vehicle is being driven when the transmission counter gear indicates more than 300 rpm and over 30 seconds have passed since the park/neutral position switch was turned OFF. If there is no signal from the vehicle speed sensor with these conditions satisfied, the ECM concludes that the vehicle speed sensor is malfunctioning. The ECM will turn on the MIL and a DTC will be set.

WIRING DIAGRAM

A0162R4E13

INSPECTION PROCEDURE

Tech Tips

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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


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

      Tech Tips


      • 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.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the tester ON.

    5. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed.

    6. Drive the vehicle.

    7. Read the value displayed on the tester.

      OK
      Vehicle speeds displayed on the tester and speedometer display are equal.

    NG

    CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) Click here

    OK

    CHECK INTERMITTENT PROBLEMS Click here

  2. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)


    1. Inspect the combination meter assembly using an oscilloscope.


      1. Move the shift lever to N.

      2. Jack up the vehicle.

      3. Turn the engine switch on (IG).

      4. Measure the voltage between the terminal of the combination meter and body ground while the wheel is turned slowly.

        A0163B5E03
        Standard Voltage
        Tester Connection Condition Specified Condition
        J34-5 (+S) - Body ground Engine switch on (IG) Voltage generated intermittently

        Tech Tips

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


    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)


    1. A016317E07

      Disconnect the combination meter connector.

    2. Disconnect the 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
      J34-5 (+S) - A5-24 (SPD) Always Below 1 Ω

    4. Reconnect the combination meter connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)


    1. A016317E07

      Disconnect the combination meter connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      J34-5 (+S) or A5-24 (SPD) - Body ground Always 10 kΩ or higher

    4. Reconnect the combination meter connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here