AUTOMATIC TRANSMISSION SYSTEM(for 1VD-FTV), 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.

B001XY6E06
*a 4-Pulse
*b from Wheel Speed Sensor
*c Skid Control ECU
*d Combination Meter
DTC Code DTC Detection Condition Trouble Area
P0500 While the vehicle is being driven, no vehicle speed sensor signal is transmitted to the ECM (2 trip detection logic).

  • Open or short in speed signal circuit

  • Wheel speed sensor

  • Combination meter

  • ECM

  • Skid control ECU

MONITOR DESCRIPTION

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

WIRING DIAGRAM

A01XBFEE03

CAUTION / NOTICE / HINT

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. CHECK OPERATION OF SPEEDOMETER


    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 Click here.


    NG

    GO TO METER / GAUGE SYSTEM PROBLEM SYMPTOMS TABLE Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPD)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Drive the vehicle.

    6. According to the display on the tester, read the Data List.

      ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed

      Vehicle speed/

      Min.: 0 km/h (0 mph)

      Max.: 255 km/h (158 mph)

      		 Actual vehicle speed The speed is indicated on the speedometer.
      OK
      Vehicle speeds displayed on intelligent tester and speedometer display are equal.

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE)

    A01X7WTE01
    *1 Front view of wire harness connector: (to Combination Meter)

    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
      E7-4 (+S) - Body ground Ignition switch ON 4.5 to 5.5 V

    NG

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

    OK

  4. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)

    A01X53EE02
    *1 Rear view of wire harness connector: (to Combination Meter)
    *2 0 to 5 V
    *3 Turn Wheel

    1. Move the shift lever to N.

    2. Jack up the vehicle.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E7-4 (+S) - Body ground

      • Ignition switch ON

      • Wheel is turned slowly

      		 Voltage generated intermittently

      Tech Tips

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

      Result
      Result Proceed to
      OK A
      NG (w/ Multi-information Display) B
      NG (w/o Multi-information Display) C

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    C

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

    A01X72BE01

    1. 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
      for LHD
      Tester Connection Condition Specified Condition
      E7-4 (+S) - A38-8 (SPD) Always Below 1 Ω
      E7-4 (+S) or A38-8 (SPD) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E7-4 (+S) - A52-8 (SPD) Always Below 1 Ω
      E7-4 (+S) or A52-8 (SPD) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR HARNESS OR CONNECTOR