CRUISE CONTROL SYSTEM, Diagnostic DTC:U0122

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

DESCRIPTION

The hybrid vehicle control ECU receives signals from the brake booster with master cylinder assembly via CAN communication.

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

  • CAN communication system

  • Hybrid vehicle control ECU

  • Brake booster with master cylinder assembly

PROCEDURE


  1. CHECK FOR DTCs (CAN COMMUNICATION 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 main switch (ON/OFF).

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

    3. Check the 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