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Home › Toyota › 2008 › Corolla LE, Automatic › Repair and Diagnosis › External Pages › Different car › Section 49 (Navigation System) › Navigation System › DTC 01-D6 No Master; DTC 01-D7 Connection Check Error › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Camry Solara. 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 NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT 

    Refer to the NAVIGATION RECEIVER ASSEMBLY 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.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component which has stored this code.

      Component Table: 

      COMPONENT CHART

      Display Component
      DSP-AMP Stereo component amplifier

      HINT:

      "AVN" is the component which has stored this code in the example shown in the illustration.

      Fig 1: Screen Display - LAN Monitor
      G05135439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 CHART

      Component Proceed to
      Stereo component amplifier (DSP-AMP) STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT 
  4. CHECK NAVIGATION RECEIVER ASSEMBLY 
    Fig 2: Checking Navigation Receiver Assembly
    G05135440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the navigation receiver assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      TX+ (R7-5) - TX- (R7-15) Always 60 to 80 Ω

    NG: REPLACE NAVIGATION RECEIVER ASSEMBLY 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR 

    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 navigation receiver assembly and the component which has stored this code.
      1. Disconnect all connectors between the navigation receiver assembly and the component which has stored this code.
      2. Check for an open or short in the AVC-LAN circuit between the navigation receiver assembly and the component which has stored this code.

        OK: There is no open or short circuit. 

        Fig 3: AVC-LAN Wiring Diagram
        G05135441Courtesy 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 NAVIGATION RECEIVER ASSEMBLY 

    OK: END 

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