AUDIO AND VISUAL SYSTEM (w/o Multi-display) Accessory Meter Assembly Communication Error

INSPECTION PROCEDURE

PROCEDURE


  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE


    1. Enter diagnostic mode Click here.

      A019MT1E24

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

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

      Tech Tips


      • The sub-code "P190" shown in 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

      Stereo component amplifier assembly (440)

      Stereo component amplifier power source circuit Click here

      Air conditioning control panel (1C4)

      Air conditioning control panel circuit Click here


    NEXT

  3. INSPECT RADIO RECEIVER ASSEMBLY


    1. Disconnect the G7, G57 and G9 radio receiver assembly connectors.

    2. A019O4UE08
      Text in Illustration
      *a

      Component without harness connected

      (Radio Receiver Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G7-5 (ATX+) - G7-15 (ATX-) Always 60 to 80 Ω
      G57-9 (TXM+) - G57-10 (TXM-) Always 60 to 80 Ω
      G9-9 (TX+) - G9-10 (TX-) Always 60 to 80 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (ACCESSORY METER ASSEMBLY - COMPONENT SHOWN BY SUB-CODE)

    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 following AVC-LAN wiring diagram, check the AVC-LAN circuit between the accessory meter assembly and component shown by the sub-code.


      1. Disconnect all connectors between the accessory meter assembly and component shown by the sub-code.

      2. Check for an open or short in the AVC-LAN circuit between the accessory meter assembly and component shown by the sub-code.

        OK
        There is no open or short circuit.
        A019LKBE06

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK 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 ACCESSORY METER ASSEMBLY Click here

    OK

    END