PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0100, U0122, U0151, U1101

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0122 Lost Communication with Vehicle Dynamics Control Module
U0151 Lost Communication with Airbag ECU
U1101 Lost Communication with Distance Control ECU

DESCRIPTION

The seat belt control ECU receives signals from the master cylinder solenoid (skid control ECU) and the center airbag sensor via the CAN communication line.

The distance control ECU receives signals from the ECM via the CAN communication line.

DTC Code DTC Detection Item Inspection Area
U0100 ECM communication error.

  • CAN communication system

  • Distance control ECU

  • ECM
U0122 Skid control ECU communication error.

  • CAN communication system

  • Master cylinder solenoid (skid control ECU)

  • Seat belt control ECU
U0151 Center airbag sensor communication error.

  • CAN communication system

  • Seat belt control ECU

  • Center airbag sensor
U1101 Distance control ECU communication error.

  • CAN communication system

  • Distance control ECU

  • Seat belt control ECU

INSPECTION PROCEDURE

Tech Tips

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.

PROCEDURE


  1. CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Use the intelligent tester to check if the CAN communication system is functioning normally Click here for LHD, Click here for RHD).

      Result
      Result Proceed to

      OK

      (DTC is not output)

      		 A

      NG

      (for LHD)

      		 B

      NG

      (for RHD)

      		 C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here