AUDIO AND VISUAL SYSTEM, Diagnostic DTC:01-DF

DTC Code DTC Name
01-DF Master Error

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area

01-DF

*1

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

Also when a communication error between sub-master (audio) and master occurs, this code is stored.

  • Radio receiver power source circuit


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


  • Radio receiver


  • Component which has stored this code

Tech Tips

*1: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the engine switch on (ACC or IG), this code is stored.

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 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.

INSPECTION PROCEDURE

Note

Be sure to read Description before performing the following procedures.

PROCEDURE


  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

    Refer to Radio Receiver Power Source Circuit Click here.

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


    NEXT

  2. INSPECT RADIO RECEIVER


    1. Disconnect the radio receiver connectors.

      A015YOTE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J66-5 (ATX+) - J66-15 (ATX-) Always 60 to 80 Ω
      J65-9 (TXM+) - J65-10 (TXM-) Always 60 to 80 Ω
      J63-9 (TX+) - J63-10 (TX-) Always 60 to 80 Ω

    NG

    REPLACE RADIO RECEIVER Click here

    OK

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE


    1. Enter the diagnostic mode.

      A015YMGE12

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

    3. Identify the component which has stored this code.

      Component Table
      Component Physical Address
      Gateway ECU 1C6
      Stereo component amplifier 440
      Integration control & panel assembly 1D8

      Tech Tips


      • "440 (stereo component amplifier)" 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. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

    Tech Tips

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


    1. Referring to AVC-LAN Wiring Diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code.


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

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

        OK
        There are no open or short circuits.
        A015YWSE01

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE RADIO RECEIVER


    1. Replace the radio receiver with a known good one and check if the same problem occurs again.

      OK
      Same problem does not occur.

    NG

    REPLACE COMPONENT WHICH HAS STORED THIS CODE

    OK

    END