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DTC 01-DF Master Error: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION CHART

DTC No	DTC Detection Condition	Trouble Area
01-DF *1	The device with a display fails and the master is switched to the audio device A communication error between sub-master (radio receiver) and master occurs	Multi-display power source circuit AVC-LAN circuit between the multi-display and the component which has stored this code AVC-LAN circuit between the multi-display and the radio receiver Multi-display Component which has stored this code
HINT. *1. When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the engine switch on (ACC or IG), this code is stored

NOTE:

Before starting troubleshooting, be sure to clear DTCs stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs.
The multi-display is the master unit.
Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.