LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:U0100,U0140,U0142 and U0155

DTC Code DTC Name
U0100 Lost Communication with ECM
U0140 Lost Communication with Body Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

DESCRIPTION

These DTCs are 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

U0100

Lost Communication with ECM

A problem with the engine information signal from the ECM.

CAN communication system

U0140

Lost Communication with Body Control Module

A problem with the vehicle information signal from the main body ECU (multiplex network body ECU).

CAN communication system

U0142

Lost Communication with Body Control Module "B"

A problem with the vehicle information signal from the main body ECU (multiplex network body ECU).

CAN communication system

U0155

Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

A problem with the vehicle speed information signal from the combination meter assembly

CAN communication 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

    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

      DTC (CAN communication system DTC) is output

      A

      No DTC is output

      B

    A

    GO TO CAN COMMUNICATION SYSTEM

    B

    USE SIMULATION METHOD TO CHECK