DTC 01-D5, 01-D8, 01-D9, 01-DA, 01-DB, 01-DE: Absence of Registration Unit; No Response for Connection Check; Last Mode Error; No Response Against ON/OFF Command; Mode Status Error; Slave Reset: Description

DTC DETECTION CONDITION TABLE

DTC No.	DTC Detection Condition	Trouble Area
01-D51, 4	When either condition below is met: Device that sub-code shows is (was) disconnected from system when turning ignition switch ON or ACC Communication condition with device that code shows cannot be obtained when engine starts	Power source circuit of component shown by sub-code AVC-LAN circuit between radio receiver and component shown by sub-code Component shown by sub-code
01-D82, 4	Device indicated by sub-code is (was) disconnected from system after engine starts
01-D91, 4	Device that had functioned before engine stopped is (was) disconnected from system when ignition switch is (was) in ON or ACC
01-DA*4	When either condition below is met: No response is identified when changing mode Detected when sound and image do not change by switch operation
01-DB1, 4	Dual alarm is detected
01-DE3, 4	Code is stored when slave device has been disconnected after engine starts
HINT: 1: Even if no failure is detected, a trouble code may be recorded depending on the battery condition or engine start voltage. 2: If the power connector is disconnected after the engine starts, this code is recorded after 180 seconds. 3: This code may be stored if the engine is started and the ignition switch is turned to the START position again. 4: If the device is reported as not existing during verification, check the power source circuit and AVC-LAN circuit for the device.

NOTE:

Before starting troubleshooting, be sure to clear DTCs to erase codes 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.