AUDIO AND VISUAL SYSTEM (for Radio Receiver Type), Diagnostic DTC:01-DF

DTC Code DTC Name
01-DF Master Error

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
01-DF*

Either condition is met:


  • The device with a display fails and the master is switched to the audio device.

  • A communication error between the sub-master (audio) and master occurs.

  • Radio receiver power source circuit


  • AVC-LAN circuit between the radio receiver assembly and the component which has stored this code


  • Radio receiver assembly


  • Component which has stored this code

Tech Tips

*: When 210 seconds have elapsed after disconnecting the power supply connector of the master unit with the ignition switch ACC or ON, this code is stored.

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 radio receiver assembly is the master unit.

  • Be sure to clear and recheck for DTCs after the inspection is completed to confirm that no DTCs are output.

WIRING DIAGRAM

A01IR4IE02

INSPECTION PROCEDURE

Note

Be sure to read Description before performing the following procedures.

PROCEDURE


  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT


    1. Refer to Radio Receiver Power Source Circuit Click here.

      Tech Tips

      If the power source circuit is operating normally, proceed to the next step.


    NEXT

  2. INSPECT RADIO RECEIVER ASSEMBLY


    1. A01IQMGE01
      Text in Illustration
      *1

      Component without harness connected

      (Radio Receiver Assembly)

      Disconnect the H103 radio receiver assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H103-9 (TXM+) - H103-10 (TXM-) Always 60 to 80 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE


    1. Enter the diagnostic mode.

      A01IS0KE15

    2. Press the preset switch "channel 3" to change to "Detailed Information Mode".

    3. Identify the component which has stored this code.

      Component Table
      Component Physical Address
      Radio receiver assembly 190
      Multi-media interface ECU 388

      • "440 (stereo component amplifier assembly)" is the component which has stored this code in the example shown in the illustration.

      • For details of the DTC display, refer to DTC Check/Clear Click here.


    NEXT

  4. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE


    1. Select the component which has stored this code.

      Tech Tips

      The "Bluetooth" handsfree module is built into the radio receiver assembly. If there is a problem between the "Bluetooth" handsfree module and radio receiver assembly, replace the radio receiver assembly.

      Component Table
      Component Proceed to
      Except radio receiver assembly A
      Radio receiver assembly B

    B

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

    Tech Tips

    For details of connectors, refer to Terminals of ECU Click here.


    1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.


      1. Disconnect all connectors between the radio receiver assembly and the component which has stored this code.

      2. Check for an open or short in the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.

        OK
        There is no open or short circuit.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE RADIO RECEIVER ASSEMBLY


    1. Replace the radio receiver assembly Click here.

      OK
      Same problem does not occur.

    NG

    REPLACE COMPONENT WHICH HAS STORED THIS CODE

    OK

    END