CRUISE CONTROL SYSTEM, Diagnostic DTC:P0503

DTC Code DTC Name
P0503 Vehicle Speed Sensor Circuit Malfunction

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 cruise control is in operation, the ECM determines there to be a momentary interruption or noise and stores a DTC.

DTC DTC Detection Condition Trouble Area
P0503 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.

  • Anti-lock brake system*1

  • Vehicle stability control system*2

  • Vehicle speed sensor signal circuit

  • Vehicle speed sensor

  • Combination meter assembly

  • ECM

PROCEDURE


  1. CHECK FOR DTC (BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS)


    1. Check for DTCs.

      Tech Tips


      OK
      DTCs are not output.
      Result
      Result Proceed to
      OK A
      NG (w/o VSC) B
      NG (w/ VSC) C

    B

    GO TO ANTI-LOCK BRAKE SYSTEM Click here

    C

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

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

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


      1. Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more.

      2. Turn the cruise control main switch on.

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

    3. Check for DTCs Click here.

      OK
      DTC P0503 is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    GO TO SFI SYSTEM Click here