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 No.

Detection Item

DTC Detection Condition

Trouble Area

P0503

Vehicle Speed Sensor Circuit Malfunction

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

      OK

      NG
    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM

    Click here

    OK

  2. 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 50 km/h (30 mph) or more.

      2. Turn the cruise control 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

      OK

      NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click here

    NG

    REPLACE ECM

    Click here