DTC B156C: Extension Module Disconnected [08/2015 - 08/2019]: Description

The stereo replacement component tuner assembly and the navigation receiver assembly are connected by the USB communication line.

When an USB communication error occurs between the stereo replacement component tuner assembly and the navigation receiver assembly, this DTC will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B156C	Extension Module Disconnected	Stereo replacement component tuner assembly disconnected.	Harness or connector Stereo replacement component tuner assembly Navigation receiver assembly