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Inspection Procedure

  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE 
    1. Enter the diagnostic mode.
      Fig 1: Identifying Service Check Mode And Detailed Information Mode
      G05156193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "3" to change to "Detailed Information Mode".
    3. Identify the component shown by the sub-code.

      HINT:

      • "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.
      • For details of the DTC display, refer to "DTC Check/Clear" (See DTC CHECK/CLEAR ).
  2. CHECK COMPONENT SHOWN BY SUB-CODE 
    1. Select the component shown by sub-code.

      HINT:

      The "Bluetooth" handsfree module is built into the radio receiver assembly. If there is a problem between the "Bluetooth" handsfree module and radio receiver assembly, replace the radio receiver assembly.

      Component Table 

    COMPONENT REFERENCE

    Component Proceed to
    Except Radio Receiver A
    Radio Receiver (190) B

    B: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL )

    A: Go to next step. 

  3. 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 REFERENCE

    Component Proceed to
    Stereo component amplifier (440) Stereo Component Amplifier Power Source Circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
  4. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the R1 radio receiver assembly connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      R1-5 (TX+) - R1-15 (TX-) Always 60 to 80 Ω
    3. Reconnect the radio receiver assembly connectors.

    NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL )

    Fig 2: Identifying R1 Radio Receiver Assembly Connector Terminals
    G06084749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step. 

  5. CHECK HARNESS AND CONNECTOR ("BLUETOOTH" HANDSFREE MODULE - COMPONENT SHOWN BY SUB-CODE) 
    Fig 3: AVC-LAN Wiring Diagram
    G06084669Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    • 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" (See TERMINALS OF ECU ).
      1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the "Bluetooth" handsfree module and the component shown by the sub-code.
        1. Disconnect all connectors between the "Bluetooth" handsfree module and the component shown by the sub-code.
        2. Check for an open or short in the AVC-LAN circuit between the "Bluetooth" handsfree module and the component shown by the sub-code.

          OK: There is no open or short circuit. 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  6. REPLACE COMPONENT SHOWN BY SUB-CODE 
    1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE RADIO RECEIVER ASSEMBLY (BUILT-IN "BLUETOOTH" HANDSFREE MODULE)  (See REMOVAL )

    OK: END 

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