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

    Refer to CIRCUIT DESCRIPTION  .

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

  2. 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 1: Disconnecting Radio Receiver Connector
      G04337664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: GO TO NEXT STEP. 

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 2: Identifying Service Check Mode & Detailed Information Mode
      G04337665Courtesy 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

      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.
      • For details of the DTC display, refer to the DTC CHECK/CLEAR  .
  4. CHECK HARNESS AND CONNECTOR (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
        G04337666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP. 

  5. REPLACE RADIO RECEIVER 
    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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