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 receives signals from the skid control ECU (brake actuator assembly), steering angle sensor (spiral with sensor cable sub-assembly), airbag ECU assembly (built into acceleration sensor), engine stop and start ECU* 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), CAN communication from the ECM stops for 3 seconds or more.

  • ECM

  • CAN communication system

  • Absorber control ECU

 Does not come on -
U0101 Lost Communication with TCM While driving at 30 km/h (19 mph), CAN communication from the ECM stops for 6 seconds or more.

  • ECM

  • CAN communication system

  • Absorber control ECU

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

  • Skid control ECU (brake actuator assembly)

  • CAN communication system

  • Absorber control ECU

 Does not come on -
U0124 Lost Communication with Lateral Acceleration Sensor Module CAN communication from the airbag ECU assembly (built into acceleration sensor) stops for 3 seconds or more.

  • Airbag ECU assembly (built into acceleration sensor)

  • CAN communication system

  • Absorber control ECU

 Does not come on -
U0126 Lost Communication with Steering Angle Sensor Module CAN communication from the steering angle sensor (spiral with sensor cable sub-assembly) stops for 3 seconds or more.

  • Steering angle sensor (spiral with sensor cable sub-assembly)

  • CAN communication system

  • Absorber control ECU

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

  • Engine stop and start ECU

  • CAN communication system

  • Absorber control ECU

 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, perform all of the following again: 1) symptom simulation; 2) DTC inspection; and 3) GTS inspection (ECU Data List or Active Test Click here). If no malfunctions are found in other areas, replace the absorber control ECU.

  • When the absorber control ECU 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 DTC is not output A
      CAN DTC is 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 malfunction DTC.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

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