SFI SYSTEM, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

The wheel speed sensors monitor the wheel rotation speed and send signals 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 assembly. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Tech Tips


  • A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.

  • If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.

A005GFHE63
*a 4-Pulse
*b Skid Control ECU
*c from Speed Sensor
*d Combination Meter Assembly
DTC No. DTC Detection Condition Trouble Area
P0500

For Manual Transaxle:

While vehicle is being driven, no vehicle speed sensor signal is sent to the ECM.

(2 trip detection logic)

  • Open or short in speed signal circuit

  • Combination meter assembly

  • Skid control ECU

  • Power steering ECU

  • Radio receiver

  • ECM

For CVT:

While vehicle is being driven, no vehicle speed sensor signal is sent to the ECM.

(1 trip detection logic)

MONITOR DESCRIPTION


CONFIRMATION DRIVING PATTERN

A005IQ6E05
*1 24 km/h (15 mph)
*2 Idling
*3 Ignition Switch ON
*4 Total of 30 seconds or more

  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON and turn the tester on.

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the tester on [A].

  6. Start the engine.

  7. Drive the vehicle at 24 km/h (15 mph) or more for a total of 30 seconds or more [B].

    CAUTION:

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

  8. Stop the vehicle.

  9. Enter the following menus: Powertrain / Engine and ECT / DTC [C].

  10. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0500.

  13. Check the DTC judgment result.

    Tester Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    UNKNOWN

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

A005KCXE05

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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 ANY OTHER DTCS OUTPUT (BRAKE CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Chassis / ABS/VSC/TRC / DTC.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO DTC CHART (BRAKE CONTROL) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Drive the vehicle.

    6. Read the value displayed on the tester.

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

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. INSPECT COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM)


    1. A005H7AE02
      Text in Illustration
      *a

      Component with harness connected

      (Combination Meter Assembly)

      Move the shift lever to N or neutral.

    2. Jack up the vehicle.

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F1-6 (+S) - Body ground

      Ignition switch ON

      Turn wheel slowly

      		 Voltage generated intermittently

      Tech Tips

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


    NG

    GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT) Click here

    OK

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


    1. Disconnect the ECM connector.

    2. Disconnect the combination meter assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F1-6 (+S) - A58-44 (SPD) Always Below 1 Ω

    4. Reconnect the ECM connector.

    5. Reconnect the combination meter assembly connector.


    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR