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Rear Display Assembly Communication Error

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
  1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component shown by the sub-code.

      HINT:

      • The "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 " .
        Fig 1: Multi-Display Screen - System Check Mode And LAN Monitor
        G04093061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 Table 

      COMPONENT REFERENCE TABLE

      Component Proceed to
      Rear Display Assembly (1 B0) REAR DISPLAY ASSEMBLY POWER SOURCE CIRCUIT 
  3. INSPECT MULTI-DISPLAY CONTROLLER 
    1. Disconnect the multi-display connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      TX+ (R26-1)- TX- (R26-6) Always 60 to 80 Ω
      TX2+ (R17-5) - TX2- (R17-4) Always 60 to 80 Ω
      TX3+ (R15-17) TX3- (R15-18) Always 60 to 80 Ω
      TX4+ (R16-14) TX4- (R16-13) Always 60 to 80 Ω
      Fig 2: Identifying Multi-Display Connectors
      G04115588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE MULTI-DISPLAY CONTROLLER 

    OK: Go to next step. 

  4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - 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 multi-display and the component shown by the sub-code.
      Fig 3: AVC-LAN Wiring Diagram
      G04115589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Check for open or short in the AVC-LAN circuit between the multi-display and the component shown by the sub-code.

        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 REAR DISPLAY ASSEMBLY 

    OK: END 

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