LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:U0101

DTC Code DTC Name
U0101 Lost Communication with TCM

DESCRIPTION

This DTC is stored when the clearance warning ECU*1 or parking assist ECU*2 cannot receive and recognize certain signals via the CAN communication system.

  • *1: w/o Parking Assist Monitor System and/or Side Monitor System

  • *2: w/ Parking Assist Monitor System and/or Side Monitor System

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0101

Lost Communication with TCM

A problem with the shift position information signal from the power management control ECU

  • CAN communication system

  • Clearance warning ECU (w/o Parking Assist Monitor System and/or Side Monitor System)

  • Parking assist ECU (w/ Parking Assist Monitor System and/or Side Monitor System)
Tip:

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

PROCEDURE

  1. CHECK FOR DTC (U0101)

    1. Clear the DTCs.

      Click here

      Body Electrical > Clearance Sonar > Trouble Codes

      Body Electrical > D-SEAT SW > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > Clearance Sonar > Trouble Codes

      Body Electrical > D-SEAT SW > Trouble Codes

      Result

      Result

      Proceed to

      DTC U0101 is output (w/o Parking Assist Monitor System and/or Side Monitor System)

      A

      DTC U0101 is output (w/ Parking Assist Monitor System and/or Side Monitor System)

      B

      No DTC is output

      C
    A

    GO TO CAN COMMUNICATION SYSTEM

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick here

    B

  2. CHECK FOR DTC (C168D)

    1. Clear the DTCs.

      Click here

      Body Electrical > Clearance Sonar > Clear DTCs

      Body Electrical > D-SEAT SW > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > Clearance Sonar > Trouble Codes

      Body Electrical > D-SEAT SW > Trouble Codes

      Result

      Result

      Proceed to

      No DTC is output

      A

      DTC C168D is output (w/ Parking Assist Monitor System and Side Monitor System)

      B

      DTC C168D is output (w/ Rear View Monitor System and Side Monitor System)

      C
      Tip:

      If DTC U0101 is still output after performing the procedure to troubleshoot DTC C168D, replace the parking assist ECU.

    A

    GO TO CAN COMMUNICATION SYSTEM

    Click here

    B

    GO TO PARKING ASSIST MONITOR SYSTEM

    Click here

    C

    GO TO REAR VIEW MONITOR SYSTEM (W/ SIDE MONITOR SYSTEM)

    Click here