CRUISE CONTROL SYSTEM(except 1ND-TV, 8NR-FTS), Diagnostic DTC:P0503

DTC Code DTC Name
P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High

DESCRIPTION

If a malfunction (a rapid change in vehicle speed) in the vehicle speed signal being output from the skid control ECU is detected while the cruise control is controlling vehicle speed, the ECM determines that there is a momentary interruption or noise, and stores a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High A momentary interruption or noise is detected when a rapid change of the vehicle speed occurs while the cruise control system is controlling vehicle speed.

  • Vehicle speed sensor

  • Vehicle speed sensor signal circuit

  • Combination meter assembly

  • ECM

CAUTION / NOTICE / HINT

Note

Before replacing the ECM, refer to Service Bulletin.

Tech Tips

This DTC may be output by the vehicle stability control system at the same time. In that case, perform troubleshooting for the vehicle stability control system first.

PROCEDURE


  1. CHECK FOR DTCS (VEHICLE STABILITY CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

    5. Check for DTCs.


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART) Click here

    A

  2. REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly.

      for Hatchback, Wagon: Click here

      for Sedan: Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTCS (CRUISE CONTROL SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. for 1NR-FE, 1ZR-FAE, 1ZR-FE, 2ZR-FE:

      Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    5. for 1WW:

      Clear the DTCs.

      Click here


      Powertrain > Cruise Control > Clear DTCs

    6. Perform the following to make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the malfunction cannot be detected.


      1. Drive the vehicle at a speed for which cruise control system operation is possible.

      2. Turn the cruise control system on using the cruise control switch (ON-OFF button).

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    7. for 1NR-FE, 1ZR-FAE, 1ZR-FE, 2ZR-FE:

      Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes

    8. for 1WW:

      Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC P0503 is output B

    A

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE ECM for 1NR-FE: Click here
    REPLACE ECM for 1ZR-FAE: Click here
    REPLACE ECM for 1ZR-FE: Click here
    REPLACE ECM for 2ZR-FE: Click here
    REPLACE ECM for 1WW: Click here