DTC 5-1: LEXUS Link Communication Error: Description

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the bus buffer ECU is malfunctioning; 3) the main body ECU is malfunctioning; or 4) the CAN line/wire harness is open or shorted.

DTC Code	DTC Detection Condition	Trouble Area
5-1	Communication or the communication line is abnormal between the telephone ECU assembly and another ECU.	Telephone ECU assembly Bus buffer ECU Main body ECU Harness or connector CAN communication system Light control switch circuit