CRUISE CONTROL SYSTEM, 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 brake actuator assembly (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 No.

Detection Item

DTC Detection Condition

Trouble Area

P0503

Vehicle Speed Sensor "A" Intermittent / Erratic / High

A malfunction in the vehicle speed signal is detected while the cruise control is in operation.

  • Vehicle stability control system

  • Vehicle speed sensor

  • Vehicle speed sensor signal circuit

  • Combination meter assembly

  • ECM

PROCEDURE

  1. CHECK FOR DTC (VEHICLE STABILITY CONTROL SYSTEM)

    1. Check for DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Proceed to

    Vehicle stability control system DTCs are not output

    Vehicle stability control system DTCs are output
    Vehicle stability control system DTCs are output

    GO TO VEHICLE STABILITY CONTROL SYSTEM

    Click hereClick here

    Vehicle stability control system DTCs are not output

  2. CHECK FOR DTC (CRUISE CONTROL SYSTEM)

    1. Clear the DTCs.

      Click here

      Powertrain > Cruise Control > Clear DTCs

    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

      Powertrain > Cruise Control > Trouble Codes

    Result

    Proceed to

    DTC P0503 is not output

    DTC P0503 is output
    DTC P0503 is not output

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick here

    DTC P0503 is output

    REPLACE ECM

    for 1AD-FTV:Click here

    for 2AD-FHV:Click here

    for 2AD-CCo, 2AD-DPF:Click here

    for 2AR-FE:Click here

    for 3ZR-FAE:Click hereClick here

    for 3ZR-FE:Click here