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

DTC Code DTC Detection Condition Trouble Area
P0503 A malfunction in the vehicle speed signal is detected while cruise control is in operation.

  • Vehicle stability control system

  • Vehicle speed sensor signal circuit

  • Vehicle speed sensor

  • Combination meter assembly

  • ECM

PROCEDURE


  1. CHECK FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      Vehicle stability control system DTCs are not output.
      Result
      Result Proceed to
      OK A
      NG (for Hydraulic Brake Booster) B
      NG (for Vacuum Brake Booster) C

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    C

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      for Gasoline Engine A
      for Diesel Engine B

    B

    CHECK FOR DTC Click here

    A

  3. 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 40 km/h (25 mph) or more.

      2. Turn the cruise control main switch on.

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

    3. Check for DTCs Click here.

      OK
      DTC P0503 is not output.
      Result
      Result Proceed to
      OK A
      NG (for 1GR-FE) B
      NG (for 2TR-FE) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

  4. CHECK FOR DTC


    1. Clear the DTCs Click here.

      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 40 km/h (25 mph) or more.

      2. Turn the cruise control man switch on.

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

    2. Check for DTCs Click here.

      OK
      DTC P0503 is not output.
      Result
      Result Proceed to
      OK A
      NG (for 1KD-FTV) B
      NG (for 1GD-FTV) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO ECD SYSTEM Click here

    C

    GO TO ECD SYSTEM Click here