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Home › Lexus › 2007 › ES 350 › Repair and Diagnosis › External Pages › Different car › Section 53 (Navigation System (Except Hybrid)) › Navigation System › Radio and Navigation Assembly 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.

    POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

    Component Proceed to
    Stereo component amplifier (440) STEREO COMPONENT AMPLIFIER 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 

    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 radio and navigation assembly and the component shown by the sub-code.
      1. Disconnect all connectors between the radio and navigation assembly and the component shown by the sub-code.
      2. Check for an open or short in the AVC-LAN circuit between the radio and navigation assembly 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 RADIO AND NAVIGATION ASSEMBLY 

    OK: END 

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