AUDIO AND VISUAL SYSTEM (w/o Multi-display), 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 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. Disconnect the G7, G11 and G9 radio receiver assembly connectors.

    2. A01NJVKE07
      Text in Illustration
      *a

      Component without harness connected

      (Radio Receiver Assembly)

      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

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE


    1. Enter diagnostic mode Click here.

      A01NJ4ME13

    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
      Radio receiver assembly 190
      Accessory meter assembly 1D4
      Air conditioning control panel 1C4

      Tech Tips


      • The physical address "P440" shown in the above example indicates the stereo component amplifier assembly.

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


    NEXT

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

    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.
        A01NLPVE05

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    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 that no DTCs are output. Click here

      OK
      No DTCs are output.

    NG

    REPLACE COMPONENT WHICH HAS STORED THIS CODE

    OK

    END