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Home › Lexus › 2007 › ES 350 › Repair and Diagnosis › External Pages › Different car › Section 53 (Navigation System (Except Hybrid)) › Navigation System › Stereo Component Amplifier Communication Error › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE 
    1. Enter the diagnostic mode.
      Fig 1: Diagnosis MENU Screen Display - LAN Monitor Mode
      G04967030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component shown by the sub-code.

    HINT:

    • "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration.
    • The sub-code will be indicated by its physical address.
    • For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE 
    1. Inspect the power source circuit of the component shown by the sub-code.

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

    COMPONENT CHART

    Component Proceed to
    Radio and navigation assembly (140) RADIO AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT 
  3. CHECK RADIO AND NAVIGATION ASSEMBLY 
    1. Disconnect the radio and navigation assembly connector.
      Fig 2: Identifying Radio And Navigation Assembly Connector Terminal
      G04980868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    RADIO AND NAVIGATION ASSEMBLY

    Tester connection Condition Specified condition
    ATX+ (F9-5) - ATX-(F9-15) Always 60 to 80 Ω

    NG: REPLACE RADIO AND NAVIGATION ASSEMBLY 

    OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - COMPONENT SHOWN BY SUB-CODE) 

    HINT:

    • Start the check from the circuit that is near the component shown by the sub-code first.
    • 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 stereo component amplifier and the component shown by the sub-code.
      1. Disconnect all connectors between the stereo component amplifier and the component shown by the sub-code.
      2. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier and the component shown by the sub-code.
      Fig 3: AVC-LAN Wiring Diagram
      G04980869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: There is no open or short circuit. 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  5. REPLACE COMPONENT SHOWN BY SUB-CODE 
    1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE STEREO COMPONENT AMPLIFIER 

    OK: END 

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