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DTC 01-DD Master Reset; DTC 01-E1 Voice Processing Device ON 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 AND TROUBLE AREA

DTC No.	DTC Detection Condition	Trouble Area
01-DD	The device that should be the master has been disconnected after engine start	Radio receiver power source circuit AVC-LAN circuit between the radio receiver and the component which has stored this code Radio receiver Component which has stored this code
01-E1 *1	The AMP device records that the AMP output does not function even while the source device operates
HINT. *1 Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.

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 radio receiver is the master unit.
Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.