Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Control Module Communication Bus "A" Off (U0073,U0155)

DESCRIPTION

These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication line.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0073

Control Module Communication Bus "A" Off

Control module communication bus off

CAN communication system

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

Lost communication with the combination meter assembly

CAN communication system

HINT:

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

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(b) Check for CAN communication system DTCs

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Proceed to

CAN communication system DTCs are output

A

No CAN communication system DTCs are output

B

A

GO TO CAN COMMUNICATION SYSTEM

B

USE SIMULATION METHOD TO CHECK

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    DESCRIPTION If DTC U1000 is stored frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again even if the DTC is not output when rechecking for DTCs. DTC ...

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