DTC B1561: XM Tuner Disconnected (Command Line); DTC B159F: No Response from XM Tuner: Description

The multi-media interface ECU and stereo component tuner assembly are connected by the AVC-LAN communication line.

The navigation receiver assembly is also connected to the multi-media interface ECU by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the multi-media interface ECU and stereo component tuner assembly, these DTCs will be stored.

HINT:

If either B1561 or B159F and either B156B or B156E are output, troubleshoot for B156B or B156E first.

DTC No.	DTC Detection Condition	Trouble Area
B1561*1	When either condition below is met: Stereo component tuner assembly is not/was not connected while the ignition switch is ON or ACC. Communication between the master unit and the stereo component tuner assembly is not possible when the engine is started.	Stereo component tuner assembly power source circuit AVC-LAN circuit between navigation receiver assembly and stereo component tuner assembly Stereo component tuner assembly Multi-media interface ECU Navigation receiver assembly
B159F	Within the time-out period, there was no response from the stereo component tuner assembly to the following requests from the master unit: System inspection request System inspection result request Diagnostic memory request

HINT:

*1: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
The navigation receiver assembly is the master unit.