ADAPTIVE VARIABLE SUSPENSION SYSTEM, Diagnostic DTC:U0100, U0101, U0122, U0124, U0126, U1103

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0101 Lost Communication with TCM
U0122 Lost Communication With Vehicle Dynamics Control Module
U0124 Lost Communication with Lateral Acceleration Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U1103 Lost Communication with Stop and Start Control Module

DESCRIPTION

The absorber control ECU (rear acceleration sensor) receives signals from the skid control ECU (brake actuator assembly), steering angle sensor, airbag sensor assembly (acceleration sensor)*1, yaw reat sensor assembly (acceleration sensor)*2, engine stop and start ECU*3 and ECM via CAN communication.

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
U0100 Lost Communication with ECM / PCM "A" While driving at 30 km/h (19 mph) or more, data is not received via CAN communication for 3 seconds or more.

  • ECM

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -
U0101 Lost Communication with TCM While driving at 30 km/h (19 mph) or more, data is not received via CAN communication for 6 seconds or more.

  • ECM

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -
U0122 Lost Communication with Vehicle Dynamics Control Module Data is not received from the skid control ECU (brake actuator assembly) via CAN communication for 3 seconds or more.

  • Skid control ECU (brake actuator assembly)

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -
U0124 Lost Communication with Lateral Acceleration Sensor Module Data is not received from the airbag sensor assembly (acceleration sensor)*1, yaw reat sensor assembly (acceleration sensor)*2 via CAN communication for 3 seconds or more.

  • Airbag sensor assembly (acceleration sensor)*1

  • yaw reat sensor assembly (acceleration sensor)*2

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -
U0126 Lost Communication with Steering Angle Sensor Module Data is not received from the steering angle sensor via CAN communication for 3 seconds or more.

  • Steering angle sensor

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on -
U1103 Lost Communication with Stop and Start Control Module While driving at 30 km/h (19 mph), data is not received from the engine stop and start ECU via CAN communication for 3 seconds or more.

  • Engine stop and start ECU

  • CAN communication system

  • Absorber control ECU (rear acceleration sensor)

 Does not come on w/ Stop and Start System

CAUTION / NOTICE / HINT

Note


  • Before performing troubleshooting, inspect the connectors of related circuits.

  • If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first.

    Click here

  • Before replacing the absorber control ECU (rear acceleration sensor), perform all of the following:


    • Symptom simulation.

      Click here

    • DTC inspection.

      Click here

    • GTS inspection.

      Click here


      • If no malfunctions are found in other areas, replace the absorber control ECU (rear acceleration sensor).

  • When the absorber control ECU (rear acceleration sensor) is replaced, switch to test mode and check that all test mode DTCs are cleared when their respective deletion conditions are met.

    Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Chassis > Air suspension > Clear DTCs

    2. Turn the engine switch off.

    3. Drive the vehicle at a speed of 30 km/h (19 mph) or more for 10 seconds or more.

    4. Check for DTCs.

      Click here


      Chassis > Air suspension > Trouble Codes
      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

      Tech Tips

      If a CAN communication malfunction DTC and a related sensor malfunction DTC are output at the same time, the CAN communication malfunction must be repaired before troubleshooting the sensor.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here