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 the 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 the cruise control is in operation.

  • Vehicle stability control system

  • Vehicle speed sensor signal circuit

  • Vehicle speed sensor

  • Combination meter

  • ECM

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for DTCs Click here.

      OK
      Vehicle stability control system DTCs are not output.

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT


    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 switch on.

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

    3. Check for DTCs Click here.

      OK
      DTC P0503 is not output.
      Result
      Result Proceed to
      OK A
      NG (for 1ZR-FAE) B
      NG (for 2ZR-FAE) C
      NG (for 3ZR-FAE) D

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

    GO TO SFI SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here