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CRUISE CONTROL SYSTEM (except 1WW), Diagnostic DTC:P0503

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DTC Code DTC Name
P0503 Vehicle Speed Sensor Circuit Malfunction
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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

  • ECM
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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    CHECK FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for DTCs (Click here).

      OK
      Vehicle stability control system DTCs are not output.

  2. Click here

    CHECK FOR DTC


    1. Clear the DTCs (Click here).

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

      Tip:

      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 to activate the cruise control.

    3. Check for DTCs (Click here).

      OK
      DTC P0503 is not output.
      Table 1. Result
      Result Proceed to
      OK A
      NG (for ZR Series Engine) B
      NG (for AD Series Engine) C
      Tip:

      • for 1ZR-FAE:

        If it is necessary to refer to the SFI system, refer to the following procedures (Click here).

      • for 2ZR-FAE:

        If it is necessary to refer to the SFI system, refer to the following procedures (Click here).

      • for 1AD-FTV, CCo:

        If it is necessary to refer to the ECD system, refer to the following procedures (Click here).

      • for 1AD-FTV, DPF:

        If it is necessary to refer to the ECD system, refer to the following procedures (Click here).

      • for 2AD-FHV:

        If it is necessary to refer to the ECD system, refer to the following procedures (Click here).


  3. Click here

    GO TO VEHICLE STABILITY CONTROL SYSTEMClick here

  4. Click here

    USE SIMULATION METHOD TO CHECKClick here

  5. Click here

    GO TO SFI SYSTEM

  6. Click here

    GO TO ECD SYSTEM