CRUISE CONTROL SYSTEM(except 1ND-TV, 8NR-FTS), 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 is detected while the cruise control is controlling vehicle speed, 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 of the vehicle speed occurs while the cruise control system is controlling vehicle speed.

  • Vehicle speed sensor

  • Vehicle speed sensor signal circuit

  • Combination meter assembly

  • ECM

CAUTION / NOTICE / HINT

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

PROCEDURE

  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Check for DTCs.

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B
    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART)

    Click here

    A

  2. REPLACE COMBINATION METER ASSEMBLY

    1. Replace the combination meter assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  3. CHECK FOR DTCs (CRUISE CONTROL SYSTEM)

    1. Clear the DTCs.

      Click here

      Powertrain > Cruise Control > Clear DTCs

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

      Tip:

      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 cruise control system on using the cruise control switch (ON-OFF button).

      3. Push the cruise control switch to -/SET to begin control of vehicle speed using the cruise control system.

    3. Check for DTCs.

      Click here

      Powertrain > Cruise Control > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0503 is output (for 1NR-FE)

      B

      DTC P0503 is output (for 1ZR-FAE)

      C

      DTC P0503 is output (for 1AD-FTV)

      D
    A

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)

    B

    REPLACE ECM

    Click here

    C

    REPLACE ECM

    Click here

    D

    REPLACE ECM

    Click here