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Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Be sure to read Description before performing the following procedures.
  1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT 
    1. Refer to Radio Receiver Power Source Circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT ).

      HINT:

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

  2. 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 connector.

    NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL )

    Fig 1: Identifying R1 Radio Receiver Assembly Connector Terminals
    G06084668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step. 

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 2: Identifying Service Check Mode And Detailed Information Mode
      G05652239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "3" to change to "Detailed Information Mode".
    3. Identify the component which has stored this code.

      Component Table 

      COMPONENT REFERENCE

      Component Physical Address
      Stereo component amplifier 440
      "Bluetooth" handsfree module 19D

      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 "DTC Check/Clear" (See DTC CHECK/CLEAR ).
  4. CHECK COMPONENT WHICH HAS STORED THIS CODE 
    1. Select the component which has stored this 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 "Bluetooth" handsfree module A
      "Bluetooth" handsfree module (for Column Shift Type) B

    B: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL )

    A: Go to next step. 

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) 
    Fig 3: AVC-LAN Wiring Diagram
    G06084676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    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 radio receiver assembly and the component which has stored this code.
      1. Disconnect all connectors between the radio receiver assembly and the component which has stored this code.
      2. Check for an open or short in the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.

        OK: There is no open or short circuit. 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  6. REPLACE RADIO RECEIVER ASSEMBLY 
    1. Replace the radio receiver assembly (See REMOVAL ).

      OK: Same problem does not occur. 

    NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

    OK: END 

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