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Inspection Procedure

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

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

  2. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the L51 and L57 receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      L51-5 (ATX+) - L51-15 (ATX-) Always 60 to 80 Ω
      L57-9 (TX+) - L57-10 (TX-) Always 60 to 80 Ω
      Fig 1: Identifying L51 And L57 Receiver Connectors
      G04953783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE RADIO RECEIVER ASSEMBLY (See  REMOVAL   ) 

      OK: Go to Next Step 

  3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 2: DTC - Flow Chart
      G04953779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "2" 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
      Integration control and panel assembly 1C4

      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 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, 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
        G04953781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

        OK: Go to Next Step 

  5. REPLACE RADIO RECEIVER ASSEMBLY 
    1. Replace the radio receiver with a normal one and check if the same problem occurs again (see REMOVAL  ).

      OK: 

      Same problem does not occur. 

      NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

      OK: END 

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