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Communication Diagnosis

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE CHART - COMMUNICATION DIAGNOSIS

DTC Code Detection Item Trouble Area
01-21  ROM Error Radio receiver
01-22  RAM Error Radio receiver
01-D5  Absence of Registration Unit
  1. Power source circuit of the component shown by the subcode
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the subcode
01-D6  No Master
  1. Radio receiver power source circuit
  2. Power source circuit of the component which has stored this code
  3. AVC-LAN circuit between the radio receiver and the component which has stored this code
  4. Component which has stored this code
  5. Radio receiver
01-D7  Connection Check Error
  1. Radio receiver power source circuit
  2. Power source circuit of the component which has stored this code
  3. AVC-LAN circuit between the radio receiver and the component which has stored this code
  4. Component which has stored this code
  5. Radio receiver
01-D8  No Response for Connection Check
  1. Power source circuit of the component shown by the subcode
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the subcode
01-D9  Last Mode Error
  1. Power source circuit of the component shown by the subcode
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the sub-code
01-DA  No Response Against ON / OFF Command
  1. Power source circuit of the component shown by the subcode
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the sub-code
01-DB  Mode Status Error
  1. Power source circuit of the component shown by the sub-code
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the sub-code
01-DC  Transmission Error If the same sub-code is recorded in other components, check harness for power supply and communication system of all components shown by code.
01-DD  Master Reset
  1. Radio receiver power source circuit
  2. AVC-LAN circuit between the radio receiver and the component which has stored this code
  3. Radio receiver
  4. Component which has stored this code
01-DE  Slave Reset
  1. Power source circuit of the component shown by the sub-code
  2. AVC-LAN circuit between the radio receiver and the component shown by the sub-code
  3. Component shown by the sub-code
01-DF  Master Error
  1. Radio receiver power source circuit
  2. AVC-LAN circuit between the radio receiver and the component which has stored this code
  3. Radio receiver
  4. Component which has stored this code
01-E0  Registration Complete Indication Error -
01-E1  Voice Processing Device ON Error
  1. Radio receiver power source circuit
  2. AVC-LAN circuit between the radio receiver and the component which has stored this code
  3. Radio receiver
  4. Component which has stored this code
01-E2  ON / OFF Indication Parameter Error Radio receiver
01-E3  Registration Demand Transmission -
01-E4  Multiple Frame Incomplete -
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