Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2008 >> IS 250 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio/Visual >> Audio And Visual System >> DTC 01-D6 No Master; DTC 01-D7 Connection Check Error >> Inspection Procedure

Inspection Procedure

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

    Refer to the radio receiver power source circuit (See 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: Detailed Information Mode And Service Check Mode - Communication 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 REFERENCE

    Component Physical address
    Gateway ECU 1C6
    Stereo component amplifier 440
    Integration control & panel assembly 1D8

    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 ).
  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 REFERENCE

    Component Proceed to
    Gateway ECU Gateway ECU power source circuit (See GATEWAY ECU POWER SOURCE CIRCUIT )
    Stereo component amplifier Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT )
    Integration control & panel assembly Integration control & panel assembly power source circuit (See INTEGRATION CONTROL AND PANEL ASSEMBLY 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 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      ATX+ - ATX- Always 60 to 80 Ω
      TXM+ - TXM- Always 60 to 80 Ω
      TX+ - TX- Always 60 to 80 Ω
      3. Fig 2: Identifying Radio Receiver Connector Terminal
      G05828128Courtesy 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: AVC-LAN - Wiring Diagram
      G05828129Courtesy 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 

scientia non olet · About Mike's Workshop Manuals