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Home › Lexus › 2005 › RX 330 AWD › Repair and Diagnosis › External Pages › Different car › Section 614 (Audio/Visual) › Audio And Visual System › DTC 01-D6, 01-D7: No Master; Connection Check Error › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. 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 

    Refer to RADIO RECEIVER POWER SOURCE CIRCUIT  .

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

  2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 1: Identifying Diagnostic Flow Diagram
      G04966653Courtesy 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 TABLE

      Component Physical address
      Gateway ECU 1C6
      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 above.
      • For details of the DTC display, refer to DTC CHECK/CLEAR  .
  3. CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE 
    1. Inspect the power source circuit of the component which has stored this code.

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

      Component Table: 

      COMPONENT TABLE

      Component Proceed to
      Gateway ECU GATEWAY ECU POWER SOURCE CIRCUIT 
      Stereo component amplifier STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT 
      Television display assembly TELEVISION DISPLAY POWER SOURCE CIRCUIT 
  4. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      ATX+ - ATX- Always 60 to 80 Ω
      TX+ - TX- Always 60 to 80 Ω
      TX+ - TX- Always 60 to 80 Ω
      Fig 2: Identifying Radio Receiver Connectors
      G05270558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: Go to Next step 

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) 

    HINT:

    For details of the connectors, refer to 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. Disconnect all connectors between the radio receiver and the component which has stored this code.
      2. 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: Identifying AVC-LAN Wiring Diagram
        G05270559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  6. REPLACE COMPONENT WHICH HAS STORED THIS CODE 
    1. Replace the component which has stored this code with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE RADIO RECEIVER 

    OK: END 

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