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Inspection Procedure

NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT 
    1. Refer to the RADIO RECEIVER POWER SOURCE CIRCUIT .

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

  2. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the E62 and E64* receiver connectors.
    2. Measure the resistance of the receiver.
      Fig 1: Disconnecting E62 & E64 Receiver Connectors
      G04491186Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      E62-5 (ATX+) - E62-15 (ATX-) 60 to 80 Ω
      E64-9 (TXM+) - E64-10 (TXM-)* 60 to 80 Ω

      HINT:

      *: w/Rear seat entertainment system

    NG: REPLACE RADIO RECEIVER ASSEMBLY 

    OK: Go TO NEXT STEP. 

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 2: Service Check Mode Diagnosis Procedure (Example)
      G04491187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "2" to change to "Detailed Information Mode".
    3. Identify the component which has stored this code.

      Component table 

      COMPONENT REFERENCE CHART

      Component Physical address
      Stereo component amplifier 440
      Television display assembly 1B0

      HINT:

      • "440 (Stereo component amplifier)" is the component which has stored this code in the example shown in the illustration.
      • For details of the DTC display, refer to the "DTC CHECK / CLEAR ".
  4. CHECK WIRE HARNESS (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) 

    HINT:

    For details of the connectors, refer to the "TERMINALS OF ECU ".

    1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component which has stored this code.
      1. Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code.

        OK: There is no open or short circuit. 

        Fig 3: AVC-LAN - Wiring Diagram
        G04491188Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go TO NEXT STEP. 

  5. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Replace the radio receiver 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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