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Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE 
    1. Enter the diagnostic mode.
      Fig 1: Identifying Service Check Mode & Detailed Information Mode
      G04337723Courtesy 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 COMPONENT  .
      • 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.

      Component Table 

      COMPONENT

      Component Proceed to
      Radio receiver (190) 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 radio receiver connector.
    2. Measure the resistance according to the value(s) in STANDARD RESISTANCE  .

      Standard resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      ATX+ (R1-5) - ATX-(R1-15) ((1)) Always 60 to 80
      TXM+ (R4-9) - TXM-(R4-10) Always 60 to 80
      (1) 10 Speaker System
      Fig 2: Disconnecting Radio Receiver Connector
      G04337724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: GO TO NEXT STEP. 

  4. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - COMPONENT SHOWN BY SUB-CODE) 

    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 television display assembly and the component shown by the sub-code.
      1. Check for an open or short in the AVC-LAN circuit between the television display assembly and the component shown by the sub-code.

        OK: There is no open or short circuit. 

        Fig 3: AVC-LAN Wiring Diagram
        G04337725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 

    OK: END 

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