CRUISE CONTROL SYSTEM, Diagnostic DTC:P0503

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.

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 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.

      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 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 here

   DTC P0503 is output

   REPLACE ECM for 1AD-FTV: Click here REPLACE ECM for 2AD-FHV: Click here REPLACE ECM for 2AD-CCo, 2AD-DPF: Click here REPLACE ECM for 2AR-FE: Click here REPLACE ECM for 3ZR-FAE: Click here REPLACE ECM for 3ZR-FE: Click here