DTC 4-3: Overhead Module Microphone Error: Description

This DTC is stored when one of the following occurs: 1) the telephone ECU assembly is malfunctioning; 2) the map light assembly is malfunctioning; 3) the microphone amplifier is malfunctioning; or 4) the wire harness between the telephone ECU assembly and map light is open or shorted.

DTC Code	DTC Detection Condition	Trouble Area
4-3	Communication or the communication line is abnormal between the telephone ECU assembly and microphone amplifier (located in the map light assembly).	Telephone ECU assembly Map light assembly Microphone amplifier assembly Harness or connector