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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE 
    1. Enter the diagnostic mode.
      Fig 1: Service Check Mode And Detailed Information Diagnostic Mode Flow Chart
      G04953842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "2" 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 the "DTC CHECK / CLEAR " .
  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.

      HINT:

      The "Bluetooth" handsfree module is built into the radio receiver.

      Component table 

      COMPONENT TABLE

      Component Proceed to
      Radio receiver (190) Radio receiver power source circuit (see RADIO RECEIVER POWER SOURCE CIRCUIT  )
      "Bluetooth" handsfree module (19D) Radio receiver power source circuit (see RADIO RECEIVER POWER SOURCE CIRCUIT  )
      Stereo component amplifier (440) Stereo component amplifier power source circuit (see STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT  )
  3. INSPECT RADIO RECEIVER 
    1. Disconnect the K4 and K22* receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      K4-5 (ATX+) - K4-15 (ATX-) Always 60 to 80 Ω
      K22-9 (TXM+) - K22-10 (TXM-)* Always 60 to 80 Ω
      HINT:
      *: w/ Rear Seat Entertainment System

      Result: 

      RESULT REFERENCE

      Result Proceed to
      OK A
      NG (for Column Shift Type) B
      NG (for Floor Shift Type) C

    B: REPLACE RADIO RECEIVER  (see REMOVAL  )

    C: REPLACE RADIO RECEIVER  (see REMOVAL  )

    Fig 2: Identifying K4 And K22 Connectors Terminals
    G05156232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A: Go to next step. 

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT SHOWN BY SUB-CODE) 
    Fig 3: AVC-LAN Wiring Diagram
    G05156233Courtesy 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 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 shown by the sub-code.
      1. 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 is no open or short circuit. 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  5. 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 TELEVISION DISPLAY ASSEMBLY  (see REMOVAL  )

    OK: END 

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