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Inspection Procedure

NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT 

    Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT  .

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

  2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component which has stored this code.

      Component Table: 

      COMPONENT REFERENCE

      Display Component
      AUDIO H/U Radio receiver
      DSP-AMP Stereo component amplifier
      G/W Gateway ECU
      NAVI Navigation ECU

      HINT:

      "NAVI" is the component which has stored this code in the example shown in the illustration.

      Fig 1: Screen Display - "LAN Mon" Switch To "LAN Monitor" Mode
      G05832553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE 
    1. Inspect the power source circuit of the component which has stored this code.

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

      Component Table: 

      COMPONENT REFERENCE

      Component Proceed to
      Radio receiver (AUDIO H/U) Radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT )
      Stereo component amplifier (DSP-AMP) Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
      Gateway ECU (G/W) Gateway ECU power source circuit (See GATEWAY ECU POWER SOURCE CIRCUIT )
      Navigation ECU (NAVI) Navigation ECU power source circuit (See NAVIGATION ECU POWER SOURCE CIRCUIT  )
  4. CHECK RADIO RECEIVER 
    1. Disconnect the radio receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      ATX+ (J66-5) - ATX- (J66-15) Always 60 to 80 Ω
      TX+ (J63-9) - TX- (J63-10) Always 60 to 80 Ω
      3. Fig 2: Identifying Radio Receiver Connector Terminal
      G05832554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE) 

    HINT:

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

    1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the component which has stored this code.
      1. Disconnect all connectors between the multi-display and the component which has stored this code.
      2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.

        OK: 

        There is no open or short circuit. 

        Fig 3: AVC-LAN - Wiring Diagram
        G05832555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE COMPONENT WHICH HAS STORED THIS CODE 
    1. Replace the component which has stored this code with a normal one and check if the same problem occurs again.

      OK: 

      Same problem does not occur. 

    NG: REPLACE MULTI-DISPLAY 

    OK: END 

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