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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component shown by the sub-code.

      HINT:

      • "140 (navigation receiver)" is the component shown by sub-code in the example shown in the illustration.
      • The sub-code will be indicated by its physical address.
      • For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
      Fig 1: Display - System Check Mode
      G05156744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE 
    1. Inspect the power source circuit is operating normally, proceed to the next step.

      Component table 

      POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE COMPONENT CHART

      Component Proceed to
      Navigation receiver (140) NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT 
      Stereo component amplifier (440) STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT

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

  3. CHECK NAVIGATION RECEIVER 
    1. Disconnect the K18 and K8 receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      NAVIGATION RECEIVER TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      K18-5 (ATX+) - K18-15 (ATX-) Always 60 to 80 Ω
      K8-9 (TXM+) - K8-10 (TXM-)
      Fig 2: Identifying K18 And K8 Receiver Connectors
      G05156975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      NAVIGATION RECEIVER RESULT CHART

      Result Proceed to
      OK A
      NG (for Column Shift Type) B
      NG (for Floor Shift Type) C

    B: REPLACE NAVIGATION RECEIVER  (see REMOVAL  (For Column Shift Type) )

    C: REPLACE NAVIGATION RECEIVER  (see REMOVAL  (For Floor Shift Type) )

    A: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMPONENT SHOWN BY SUB-CODE) 

    HINT:

    • Start the check from the circuit that is near the component shown by the sub-code first.
    • 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 and the component shown by the sub-code.
      1. Disconnect all connectors between the navigation receiver and the components shown by the subcode.
    2. Check for an open or short in the AVC-LAN circuit between the navigation receiver and the component shown by the sub-code.

      OK: There is no open or short circuit. 

      Fig 3: AVC-LAN Wiring Diagram
      G05156976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  5. REPLACE COMPONENT SHOWN BY SUB-CODE 
    1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

      Result 

      COMPONENT SHOWN BY SUB-CODE RESULT CHART

      Result Proceed to
      OK A
      NG (for Column Shift Type) B
      NG (for Floor Shift Type) C

    B: REPLACE NAVIGATION RECEIVER  (see REMOVAL  (For Column Shift Type) )

    C: REPLACE NAVIGATION RECEIVER  (see REMOVAL  (For Floor Shift Type) )

    A: END 

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