CRUISE CONTROL SYSTEM, Diagnostic DTC:U0122

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

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area
U0122 Lost Communication with Vehicle Dynamics Control Module When vehicle speed is 40 km/h (25 mph) or more and cruise control switch (ON/OFF button) is on, data cannot be received from brake actuator assembly (skid control ECU) for 2.5 seconds or more.

  • CAN communication system

  • ECM

  • Brake actuator assembly (skid control ECU)

PROCEDURE


  1. 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.

      Tech Tips

      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 by the cruise control system.

    3. Check for DTCs.

      Click here


      Powertrain > Cruise Control > Trouble Codes
      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here