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

DTC TROUBLE DETECTION CONDITION CHART

DTC Code	DTC Detection Condition	Trouble Area
01-D51, 3	When either condition below is met: Component shown by the sub-code is (was) disconnected from the system when turning the engine switch on (ACC) or on (IG). Communication condition with the device that the code shows cannot be obtained when the engine starts.	Power source circuit of component shown by sub-code AVC-LAN circuit between multi-display and component shown by sub-code Component shown by sub-code
01-D82, 3	Component shown by the sub-code is (was) disconnected from the system after the engine starts.
01-D91, 3	Device that had functioned before the engine stopped is (was) disconnected from the system when the engine switch is (was) on (IG) or on (ACC).
01-DA*3	When either condition below is met: No response is identified when changing modes. Sound and image do not change by switch operation.
01-DB1, 3	Dual alarm is detected.
01-DE*3	Slave device has been disconnected after the engine starts.
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 to clear codes 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 for DTCs after the inspection is completed to confirm that no DTCs are output.