AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

The speed sensors detect the wheel speed and send the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a pulse signal and outputs it to the TCM via the combination meter. The TCM determines the vehicle speed based on the frequency of this pulse signal.

A006SRSE10
DTC Code DTC Detection Condition Trouble Area
P0500 When the engine coolant temperature sensor is normal and the counter gear speed is 300 rpm or more, the vehicle speed signal is not input for 2 seconds or more (1-trip detection logic).
  • Open or short in vehicle speed signal circuit

  • Combination meter

  • Vehicle speed sensor (brake control system)

  • Skid control ECU (brake control system)

  • TCM

MONITOR DESCRIPTION

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

WIRING DIAGRAM

A006VM5E01

INSPECTION PROCEDURE

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 assembly 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 for a speedometer malfunction.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

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

    6. Drive the vehicle.

    7. Read the value displayed on the tester.

      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 -
      OK
      Vehicle speed displayed on tester and speedometer display are equal.

    NG
    OK
  2. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)


    1. A006WQ9E01
      Text in Illustration
      *1

      Component with harness connected

      (Combination Meter Assembly)

      Remove the combination meter assembly with the connector(s) still connected.

    2. Move the shift lever to N.

    3. Jack up the vehicle.

    4. Turn the ignition switch to ON.

    5. Check the signal waveform according to the condition(s) in the table below.

      Measurement Condition
      Terminal No. (Symbol) Tool Setting Condition
      D66-3 (+S) - Body ground 2 V/DIV., 20 msec./DIV. Vehicle speed 20 km/h (12 mph)
      OK
      The waveform is displayed as shown in the illustration.

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - TCM)


    1. A006TTME01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

      *2

      Front view of wire harness connector

      (to TCM)

      Disconnect the combination meter assembly connector.

    2. Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D66-3 (+S) - B77-3 (SPD) Always Below 1 Ω

    NG
    OK