DYNAMIC RADAR CRUISE CONTROL SYSTEM, 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 (brake actuator assembly) is detected while the dynamic radar cruise control is operating, 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 in the vehicle speed occurs while the dynamic radar cruise control system is operating.

  • ECM

  • Combination meter assembly

  • Vehicle speed sensors

  • Vehicle speed sensor signal circuit

INSPECTION PROCEDURE

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

Note

If the ECM is replaced, refer to Registration Click here.

PROCEDURE


  1. CHECK FOR DTCS (ABS/VSC/TRAC)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    5. Check for DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    6. Turn the engine switch off.


    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly Click here.


    NEXT

  3. CHECK FOR DTCS (P0503)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs Click here.

    4. 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 operation is possible.

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

      3. Push the cruise control main switch to -SET to activate the dynamic radar cruise control system.

    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

    6. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P0503 is output (for 2AR-FE) B
      DTC P0503 is output (for 2GR-FE) C

    7. Turn the engine switch off.


    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    A

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)