AUDIO AND VISUAL SYSTEM (w/o Navigation 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 unit is switched to the audio device.

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


  • Radio receiver assembly power source circuit

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

  • Radio receiver assembly

  • 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 power switch on (IG) or (ACC), this DTC is stored.

Note


  • Before starting troubleshooting, be sure to clear the DTCs stored due to the reason 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 the 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 procedure.

PROCEDURE


  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

    Tech Tips

    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 ASSEMBLY


    1. A01NG2QE01
      Text in Illustration
      *1

      Component without harness connected

      (Radio Receiver Assembly)

      *2

      Component without harness connected

      (Radio Receiver Assembly)

      *3

      Component without harness connected

      (Radio Receiver Assembly)

      Disconnect the radio receiver assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G7-5 (ATX+) - G7-15 (ATX-) Always 60 to 80 Ω
      G11-9 (TXM+) - G11-10 (TXM-) Always 60 to 80 Ω
      G9-9 (TX+) - G9-10 (TX-) Always 60 to 80 Ω

    NG
    OK
  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE


    1. Enter diagnostic mode.

      A01NF3ZE13
    2. Press preset switch "2" to change the mode to "Detailed Information Mode".

    3. Identify the component which has stored this code.

      Component Table
      Component Physical Address
      Stereo component amplifier assembly 440
      Accessory meter assembly 1D4
      Multi-media interface ECU 388
      Air conditioning control panel 1C4

      Tech Tips


      • "P440" set by the stereo component amplifier assembly is shown in the preceding illustration as an example.

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


    NEXT
  4. CHECK HARNESS AND CONNECTOR

    Tech Tips

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


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


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

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

        OK
        There is no open or short circuit.
        A01NG7BE01

    NG
    OK
  5. REPLACE RADIO RECEIVER ASSEMBLY


    1. Replace the radio receiver assembly with a known good one Click here.


    NEXT
  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT
  7. RECHECK FOR DTC


    1. Recheck for DTCs and check if the same problem occurs again.

      OK
      Malfunction disappears.

    NG
    OK