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Inspection Procedure

NOTE:
  • Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs.
  • The multi-display is the master unit.
  • Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT 

    Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT  .

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

  2. 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 1: Identifying Radio Receiver Connector terminals
    G04092924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: Go to next step. 

  3. 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.
    Fig 2: Multi-Display Screen - System Check Mode And LAN Monitor
    G04092925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Component Table 

    COMPONENT CHART

    Display Component
    AUDIO H/U Radio receiver
    DSP-AMP Stereo component amplifier
    G/W Gateway ECU
    NAVI Navigation ECU
    CAMERA Television camera ECU
    RSE Multi-display controller

    HINT:

    "NAVI" is the component which has stored this code in the example shown in the illustration.

  4. 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. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.

        OK: There is no open or short circuit. 

    Fig 3: AVC-LAN - Wiring Diagram (With Rear Seat Entertainment System)
    G04092926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: AVC-LAN Communication - Wiring Diagram (Without Rear Seat Entertainment System)
    G04092927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER) 

    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 radio receiver.
      1. Check for an open or short in the AVC-LAN circuit between the multi-display and the radio receiver.

        OK: There is no open or short circuit. 

    Fig 5: AVC-LAN - Wiring Diagram (With Rear Seat Entertainment System)
    G04092928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: AVC-LAN - Wiring Diagram (Without Rear Seat Entertainment System)
    G04092929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  6. REPLACE MULTI-DISPLAY 
    1. Replace the multi-display with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

    OK: END 

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