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Television Camera ECU Communication Error

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

      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 Table 

    COMPONENT CHART

    Component Proceed to
    Radio receiver (190) (SeeRADIO RECEIVER POWER SOURCE CIRCUIT )
    Stereo component amplifier (440) (SeeSTEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
    Multi-display (110) (SeeMULTI-DISPLAY POWER SOURCE CIRCUIT  )
    Navigation ECU (178) (See NAVIGATION ECU POWER SOURCE CIRCUIT  )
    Gateway ECU (1C6) Gateway ECU power source circuit (See DTC B1293 GATEWAY ECU COMMUNICATION STOP )
    Multi-display controller (1F6) (SeeMULTI-DISPLAY CONTROLLER POWER SOURCE CIRCUIT )
  3. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

    Resistance 

    TERMINALS RESISTANCE SPECIFICATION

    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
    TX+ (R4-9) -TX- (R4-10) Always 60 to 80 Ω
    Fig 2: Identifying Radio Receiver Connector terminals
    G04093058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - 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 television camera ECU and the component shown by the sub-code.
      1. Check for an open or short in the AVC-LAN circuit between the television camera ECU and the component shown by the sub-code.

        OK: There is no open or short circuit. 

    Fig 3: AVC-LAN - Wiring Diagram (With Rear Seat Entertainment System)
    G04093059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: AVC-LAN Communication - Wiring Diagram (Without Rear Seat Entertainment System)
    G04093060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 TELEVISION CAMERA ECU 

    OK: END 

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