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DTC 01-DF: Master Error: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT 

    HINT: 

    Refer to Radio Receiver Power Source Circuit .

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

    NEXT: Go to next step 

  2. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the radio receiver assembly connectors.
      Fig 1: Identifying Radio Receiver Assembly Connector Terminals
      GTY303070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR 12 SPEAKERS

      Tester Connection Condition Specified Condition
      E31-5 (ATX+) - E31-15 (ATX-) Always 60 to 80 Ω
      E35-9 (TXM+) - E35-10 (TXM-) Always 60 to 80 Ω
      FOR 9 SPEAKERS

      Tester Connection Condition Specified Condition
      E35-9 (TXM+) - E35-10 (TXM-) Always 60 to 80 Ω
      TEXT IN ILLUSTRATION

      *A for 12 Speakers
      *a Component without harness connected
      (Radio Receiver Assembly)

    NG → See step   9 

    OK: Go to next step 

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter diagnostic mode.
      Fig 2: Identifying Service Check Mode Flow Chart - Diagnostic Mode Example
      GTY206345Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      Multi-media interface ECU 388
      Satellite radio tuner 1F1

      HINT: 

      • "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 .

    NEXT: Go to next step 

  4. CHECK COMPONENT SHOWN BY SUB-CODE 
    1. Select the component shown by the sub-code.

      HINT: 

      The satellite radio tuner is built into the radio receiver assembly. If there is a problem between the satellite radio tuner and radio receiver assembly, replace the radio receiver assembly.

      COMPONENT TABLE

      Component Proceed to
      Except satellite radio tuner A
      Satellite radio tuner (1F1) B

    B → See step   9 

    A: Go to next step 

  5. CHECK HARNESS AND CONNECTOR 

    HINT: 

    For details of the connectors, refer to TERMINALS OF ECU .

    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.

        Fig 3: Identifying AVC-LAN Circuit Diagram
        GTY301858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE RADIO RECEIVER ASSEMBLY 
    1. Replace the radio receiver assembly with a known good one.

    NEXT: Go to next step 

  7. CLEAR DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

    NEXT: Go to next step 

  8. RECHECK FOR DTC 
    1. Recheck for DTCs and check if the same DTC is output again.

      OK

      No DTCs are output.

    NG → REPLACE COMPONENT WHICH HAS STORED THIS CODE 

    OK → END 

  9. REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL 


  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT 

    HINT: 

    Refer to Radio Receiver Power Source Circuit .

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

    NEXT: Go to next step 

  2. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the radio receiver assembly connectors.
      Fig 1: Identifying Radio Receiver Assembly Connector Terminals
      GTY303070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR 12 SPEAKERS

      Tester Connection Condition Specified Condition
      E31-5 (ATX+) - E31-15 (ATX-) Always 60 to 80 Ω
      E35-9 (TXM+) - E35-10 (TXM-) Always 60 to 80 Ω
      FOR 9 SPEAKERS

      Tester Connection Condition Specified Condition
      E35-9 (TXM+) - E35-10 (TXM-) Always 60 to 80 Ω
      TEXT IN ILLUSTRATION

      *A for 12 Speakers
      *a Component without harness connected
      (Radio Receiver Assembly)

    NG → See step   9 

    OK: Go to next step 

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter diagnostic mode.
      Fig 2: Identifying Service Check Mode Flow Chart - Diagnostic Mode Example
      GTY206345Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      Multi-media interface ECU 388
      Satellite radio tuner 1F1

      HINT: 

      • "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 .

    NEXT: Go to next step 

  4. CHECK COMPONENT SHOWN BY SUB-CODE 
    1. Select the component shown by the sub-code.

      HINT: 

      The satellite radio tuner is built into the radio receiver assembly. If there is a problem between the satellite radio tuner and radio receiver assembly, replace the radio receiver assembly.

      COMPONENT TABLE

      Component Proceed to
      Except satellite radio tuner A
      Satellite radio tuner (1F1) B

    B → See step   9 

    A: Go to next step 

  5. CHECK HARNESS AND CONNECTOR 

    HINT: 

    For details of the connectors, refer to TERMINALS OF ECU .

    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.

        Fig 3: Identifying AVC-LAN Circuit Diagram
        GTY301858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE RADIO RECEIVER ASSEMBLY 
    1. Replace the radio receiver assembly with a known good one.

    NEXT: Go to next step 

  7. CLEAR DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

    NEXT: Go to next step 

  8. RECHECK FOR DTC 
    1. Recheck for DTCs and check if the same DTC is output again.

      OK

      No DTCs are output.

    NG → REPLACE COMPONENT WHICH HAS STORED THIS CODE 

    OK → END 

  9. REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL 
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