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Home >> Toyota >> 2008 >> Highlander Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Audio System & Visual System (Hybrid)) >> Audio And Visual System >> DTC 01-DF Master Error >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT 

    Refer to the radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT ).

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

  2. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connector.
      2. Fig 1: Identifying Radio Receiver
      G05626492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      E2-5 (ATX+) - E2-15 (ATX-) Always 60 to 80 Ω
      E16-9 (TXM+) - E16-10 (TXM-) (*1) Always 60 to 80 Ω
      HINT:
      *1: w/ Rear Seat Entertainment System

    NG: REPLACE RADIO RECEIVER  (See RADIO RECEIVER )

    OK: Go to next step 

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 2: Identifying Service Check Mode And Detailed Information Mode
      G04966653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "3" to change the mode to "Detailed Information Mode".
    3. Identify the component which has stored this code.

      Component Table: 

      COMPONENT REFERENCE

      Component Physical Address
      Stereo component amplifier 440
      "Bluetooth" handsfree module 19D
      Television display assembly 1B0

      HINT:

      • "P440" set by the stereo component amplifier shown in the preceding illustration as an example.
      • For details of the DTC display, refer to "DTC CHECK/ CLEAR " (See DTC CHECK / CLEAR ).
  4. CHECK COMPONENT WHICH HAS STORED THIS CODE 
    1. Select the component which has stored this code.

      HINT:

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

    Component Table: 

    COMPONENT REFERENCE

    Component Proceed to
    Except "Bluetooth" handsfree module A
    "Bluetooth" handsfree module B

    B: REPLACE RADIO RECEIVER  (See RADIO RECEIVER )

    A: Go to next step 

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

    HINT:

    For details of the connectors, refer to "TERMINALS OF ECU " (See TERMINALS OF ECU ).

    1. Referring to the 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 is no open or short circuit. 

    Fig 3: AVC-LAN Circuit Wiring Diagram
    G05626487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE RADIO RECEIVER 
    1. Replace the radio receiver with a normal 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 

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