ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor

DESCRIPTION

The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU.

The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of the pulse signal.

B0042VEE41
*a 4-Pulse
*b from Wheel Speed Sensor
*c Skid Control ECU (Brake Actuator Assembly)
*d Combination Meter Assembly
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0500 Vehicle Speed Sensor Vehicle speed signal is not input to ECM regardless of whether vehicle is in motion (1 trip detection logic).

  • Open or short in speed signal circuit

  • Combination meter assembly

  • ECM

 - DTC stored

Tech Tips

For vehicles with a cruise control system, detection does not start unless the following conditions are met.


  • Speed Limiter Main button status is ON.

  • Cruise control OFF-ON button status is ON.

  • Average time period between speed pulses is a non zero value and frozen for a calibrated time.

  • Sensed vehicle speed from hardware is greater than 25 km/h (16 mph).

  • Engine is running.

DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0500 Drive the vehicle at 25 km/h (16 mph) or more
Related Data List
DTC No. Data List
P0500 Vehicle Speed

WIRING DIAGRAM

B0042FFE57
*a from Brake Actuator Assembly
*b Combination Meter Assembly
*c to Other ECUs

CAUTION / NOTICE / HINT

Note


  • When replacing the ECM, the ECM needs Registration and Initialization.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. 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, 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 assembly is normal.

      Tech Tips

      The vehicle speed sensor is operating normally if the speedometer reading is normal.

      OK
      The vehicle speed sensor is operating normally.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK SPEEDOMETER CIRCUIT Click here

    OK

  2. READ VALUE USING GTS (VEHICLE SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Vehicle Speed

    5. Drive the vehicle.

    6. Read the value displayed on the GTS.

      OK
      Vehicle speeds displayed on GTS and speedometer display are equal.
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 10 Click here

    NG

  3. CHECK TERMINAL VOLTAGE (+S VOLTAGE)

    B0044NVC03
    *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

    1. Disconnect the combination meter assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E46-6 (+S) - Body ground Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  4. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)

    B0043HHC03
    *a

    Component with harness connected

    (Combination Meter Assembly)

    1. Turn the ignition switch to ON.

    2. Jack up the vehicle.

    3. Move the shift lever to neutral.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E46-6 (+S) - Body ground Ignition switch ON Voltage generated intermittently

      Tech Tips

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

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 7 Click here

    NG

  5. REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly.

      For hatchback, wagon: Click here

      For sedan: Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 10 Click here

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


    1. Disconnect the combination meter assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E46-6 (+S) - A169-51 (SPD) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  7. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 10 Click here

  8. CHECK SPEEDOMETER CIRCUIT


    1. Check the speedometer circuit.

      Click here

      Tech Tips

      Inspect the skid control ECU (brake actuator assembly) and speed sensor.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 10 Click here

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off.

    6. Start the engine.

    7. Drive the vehicle at 25 km/h (16 mph) or more.

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    8. Turn the GTS on.

    9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    10. Confirm that the DTC is not output.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END