DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:U0122, U0293, U1104

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module
U0293 Lost Communication with Hybrid Vehicle Control System
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

The hybrid vehicle control ECU communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0122 Lost Communication with Vehicle Dynamics Control Module When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU and hybrid vehicle control ECU is detected for approximately 2.6 seconds or more.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Skid control ECU (brake booster with master cylinder assembly)
U0293 Lost Communication with Hybrid Vehicle Control System While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU continuously receives a communication cut-off signal from the skid control ECU for approximately 1 second or more.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Skid control ECU (brake booster with master cylinder assembly)
U1104 Lost Communication with Driving Support ECU While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and hybrid vehicle control ECU is detected for 1 second or more.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Driving support ECU assembly

PROCEDURE


  1. CHECK FOR DTCs (RADAR CRUISE 1)


    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. Turn the power switch on (IG).

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

      3. Drive the vehicle at 36 km/h (22 mph) or more for 3 seconds or more.

    3. Check for DTCs.

      Click here

      Result
      Result Proceed to
      DTC U0122, U0293 and U1104 are not output A
      DTC U0122, U0293 or U1104 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here