AUDIO AND VISUAL SYSTEM (for Radio Receiver Type) Multi-media Interface ECU Communication Error

INSPECTION PROCEDURE

PROCEDURE


  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE


    1. Enter diagnostic mode.

      A003UKQE23

    2. Press preset switch "2" to change to "Detailed Information Mode".

    3. Identify the component shown by the sub-code.

      Tech Tips


      • The sub-code "P190" shown in the above example indicates the radio receiver assembly.

      • For details of the DTC display, refer to DTC Check/Clear Click here.


    NEXT

  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 Proceed to
      Radio receiver assembly (190)

      Radio receiver power source circuit Click here


    NEXT

  3. INSPECT RADIO RECEIVER ASSEMBLY


    1. A003TXVE18
      Text in Illustration
      *a

      Component without harness connected

      (Radio Receiver Assembly)

      Disconnect the radio receiver assembly connector.

    2. Measure the resistance according to the values in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E99-9 (TXM+) - E99-10 (TXM-) Always 60 to 80 Ω

    B

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    A

  4. CHECK HARNESS AND CONNECTOR

    Tech Tips


    • 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 Click here.


    1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-media interface ECU and component shown by the sub-code.


      1. Disconnect all connectors between the multi-media interface ECU and component shown by the sub-code.

      2. Check for an open or short in the AVC-LAN circuit between the multi-media interface ECU and component shown by the sub-code.

        OK
        There is no open or short circuit.
        A003TF1E11

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE COMPONENT SHOWN BY SUB-CODE


    1. Replace the component shown by the sub-code with a known good one and check if the same problem occurs again.

      OK
      Malfunction disappears.

    NG

    REPLACE MULTI-MEDIA INTERFACE ECU Click here

    OK

    END