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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Be sure to read DESCRIPTION  before performing the following procedures.
  1. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT 

    Refer to 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 DISPLAY TABLE

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

      HINT:

      "NAVI" is the component which has stored this code.

      Fig 1: Identifying Diagnostic Tool Display - LAN Mon
      G04966890Courtesy 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 TABLE

      Component Proceed to
      Radio receiver (AUDIO H/U) RADIO RECEIVER POWER SOURCE CIRCUIT
      Stereo component amplifier (DSP-AMP) STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
      Gateway ECU (G/W) GATEWAY ECU POWER SOURCE CIRCUIT
      Navigation ECU (NAVI) NAVIGATION ECU POWER SOURCE CIRCUIT 
      Television display assembly (Rr-TV) TELEVISION DISPLAY 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 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

      Tester Connection Condition Specified Condition
      ATX+ (R2-5) - ATX- (R2-15) Always 60 to 80 Ω
      TX+ (R3-9) - TX- (R3-10) Always 60 to 80 Ω
      Fig 2: Identifying Radio Receiver Connector Terminals
      G05270857Courtesy 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.
        Fig 3: Identifying AVC-LAN Wiring Diagram
        G05270858Courtesy 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 

  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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