NAVIGATION SYSTEM Radio Receiver Communication Error

INSPECTION PROCEDURE

PROCEDURE


  1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE


    1. A01636BE31

      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.

      Tech Tips


      • "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 in the System Description 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
      Gateway ECU (1C6)

      Gateway ECU power source circuit Click here

      Stereo component amplifier (440)

      Stereo component amplifier power source circuit Click here

      Multi-display (110)

      Multi-display power source circuit Click here

      Navigation ECU (178)

      Navigation ECU power source circuit Click here

      Television camera ECU (1AC)

      Television camera ECU power source circuit Click here


    NEXT

  3. INSPECT RADIO RECEIVER


    1. A0163DME01

      Disconnect the radio receiver connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      J66-5 (ATX+) -

      J66-15 (ATX-)

      		 Always 60 to 80 Ω

      J63-9 (TX+) -

      J63-10 (TX-)

      		 Always 60 to 80 Ω

    NG

    REPLACE RADIO RECEIVER Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - 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 AVC-LAN Wiring Diagram below, check the AVC-LAN circuit between the radio receiver and the component shown by the sub-code.


      1. Disconnect all connectors between the radio receiver and the component shown by sub-code.

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

        OK
        There are no open or short circuits.
        A0161DBE01

    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
      Same problem does not occur.

    NG

    REPLACE RADIO RECEIVER Click here

    OK

    END