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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 (See MULTI-DISPLAY POWER SOURCE CIRCUIT ).

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

    NEXT 

  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
      CLOCK Clock assembly

      HINT:

      "NAVI" is the component which has stored this code in the example shown in Fig 1.

      Fig 1: Display LAN Monitor Mode
      G04380204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NEXT 

  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 )
      Clock assembly (CLOCK) Clock power source circuit (See CLOCK POWER SOURCE CIRCUIT )

    NEXT 

  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 SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      ATX+ (E12-5) - ATX- (E12-15) ((1)) Always 60 to 80
      TX+ (E15-9) - TX- (E15-10) Always 60 to 80
      (1) for 12 Speaker System

    NG: REPLACE RADIO RECEIVER 

    Fig 2: Identifying Radio Receiver Connector Terminals
    G04380205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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
        G04380206Courtesy 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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