CRUISE CONTROL SYSTEM(for 2AR-FE), Diagnostic DTC:U0122

DTC Code DTC Name
U0122 Lost Communication With Vehicle Dynamics Control Module

DESCRIPTION

The ECM receives signals from the skid control ECU (brake actuator assembly) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0122 Lost Communication with Vehicle Dynamics Control Module While the ignition switch is ON and the cruise control system is operating, signals cannot be received from the skid control ECU (brake actuator assembly) for 2.65 seconds or more.

  • CAN communication system

  • ECM

  • Skid control ECU (brake actuator assembly)

CAUTION / NOTICE / HINT

Tech Tips

Refer to troubleshooting in CAN Communication System.

Click here

PROCEDURE


  1. CHECK FOR DTCs


    1. Clear the DTCs.


      Powertrain > Cruise Control > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

      If the following procedure is not performed, the previously output DTC cannot be detected.


      1. Turn the ignition switch to ON.

      2. Turn the cruise control system on using the cruise control main switch.

      3. Wait for 3 seconds or more.

    3. Check for DTCs.


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      DTC U0122 is not output A
      DTC U0122 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here