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 skid control ECU via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0122 Lost Communication with Vehicle Dynamics Control Module While the vehicle speed is 40 km/h (25 mph) or more and the cruise control main switch (ON-OFF button) is on, signals cannot be received from the skid control ECU for 1 second or more.

  • CAN communication system

  • ECM

  • Skid control ECU (Brake actuator assembly)*1

  • Skid control ECU (Master cylinder solenoid)*2

*1: for Vacuum Brake Booster

*2: for Hydraulic Brake Booster

PROCEDURE


  1. CHECK FOR DTCs (CRUISE CONTROL SYSTEM)


    1. Clear the DTCs.

      Click here

    2. Make sure that 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 for which cruise control operation is possible.

      2. Turn the cruise control system on using the cruise control main switch (ON-OFF button).

      3. Push the cruise control main switch to -SET to begin control of vehicle speed using the cruise control system.

    3. Check for DTCs.

      Click here

      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