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Inspection Procedure

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  .

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

  2. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    RESISTANCE SPECIFICATION

    Tester Connection Condition Specified Condition
    ATX+ - ATX- Always 60 to 80 Ω
    TX+ - TX- Always 60 to 80 Ω
    TX+ - TX- Always 60 to 80 Ω

    NG: REPLACE RADIO RECEIVER 

    Fig 1: Identifying Radio Receiver Connectors
    G05280541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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
      G05280542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "3" to change to "Detailed Information Mode".
    3. Identify the component which has stored this code.

    Component Table: 

    COMPONENT CHART

    Component Physical address
    Gateway ECU 1C6
    Stereo component amplifier 440
    Television display assembly 1B0

    HINT:

    • "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration.
    • For details of the DTC display, refer to the "DTC CHECK / CLEAR " .
  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) 

    HINT:

    For details of the connectors, refer to the "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 Wiring Diagram
    G05280543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO next step. 

  5. 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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