AUDIO AND VISUAL SYSTEM(w/o Multi-display) Air Conditioning Control Panel Communication Error

PROCEDURE


  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE


    1. Enter diagnostic mode Click here.

      A0004RPE27

    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

      Stereo component amplifier assembly (440)

      Stereo component amplifier power source circuit Click here

      Accessory meter assembly (1D4)

      Accessory meter does not illuminate Click here


    NEXT

  3. INSPECT RADIO RECEIVER ASSEMBLY


    1. Disconnect the H82, H85 and H83 radio receiver assembly connectors.

    2. A0006JME13
      A0009R3E13

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H82-5 (ATX+) - H82-15 (ATX-) Always 60 to 80 Ω
      H85-9 (TXM+) - H85-10 (TXM-) Always 60 to 80 Ω
      H83-9 (TX+) - H83-10 (TX-) Always 60 to 80 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Radio Receiver Assembly)

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL PANEL - 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 Terminal of ECU Click here.


    1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the air conditioning control panel and component shown by the sub-code.


      1. Disconnect all connectors between the air conditioning control panel and component shown by the sub-code.

      2. Check for an open or short in the AVC-LAN circuit between the air conditioning control panel and component shown by the sub-code.

        OK
        There is no open or short circuit.
        A0007G4E09

    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.

    OK

    END

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here