April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC 01-D5 Absence of Registration Unit; DTC 01-D8 No Response for Connection Check; DTC 01-D9 Last Mode Error; DTC 01-DA No Response Against ON / OFF Command; DTC 01-DB Mode Status Error; DTC 01-DE Slave Reset: 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-D5 1, 3	A component shown by the sub-code is (was) disconnected from the system when the engine switch is (was) on (ACC or IG) The communication condition with the device that the code shows cannot be obtained when the engine starts	Power source circuit of the component shown by the sub-code AVC-LAN circuit between the multi-display and the component shown by the sub-code Component shown by the sub-code
01-D8 2, 3	A component shown by the sub-code is (was) disconnected from the system after engine start
01-D9 1, 3	The device that had functioned before the engine stopped is (was) disconnected from the system when the engine switch is (was) on (IG or ACC)
01-DA *3	No response is identified when changing mode Sound and image do not change by switch operation
01-DB 1, 3	A dual alarm is detected
01-DE *3	A slave device has been disconnected after engine start
HINT. 1 Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage 2 If the power connector is disconnected after the engine starts, this code is stored after 180 seconds. *3 If it is reported that the device does not exist during verification, check the power source circuit and AVC-LAN circuit for the device

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.