Inspection Procedure

HINT:

• Only vehicles with a navigation system have this circuit.
• "Display and Navigation Assembly" refers to the display and navigation module display.

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:

      • "118 (display and navigation module display)" is the component shown by the 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 in the System Description (See SYSTEM DESCRIPTION  ).
        Fig 1: Display - LAN Monitor Screen

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE 
   1. Inspect the power source circuit of the component shown by the sub-code.

      Component Table 

      COMPONENT CHART
      
      

      Display	Proceed to
      Radio receiver (190)	Radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT  )
      Stereo component amplifier (440)	Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT  )
      Parking assist ECU (1AC)(1)	Parking assist ECU power source circuit (See ECU POWER SOURCE CIRCUIT )
      Stereo component tuner (1F1)(2)	Satellite radio tuner power source circuit (See SATELLITE RADIO TUNER POWER SOURCE CIRCUIT  )
      Television display (1F6)(3)	Television display power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT  )
      (1) w/ Wide View Front and Side Monitor System (2) w/ SDARS System (3) w/ Rear Seat Entertainment System

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

3. INSPECT RADIO RECEIVER ASSEMBLY 
   Fig 2: Identifying F1, F23 And F24 Receiver Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the F1, F23 and F24 receiver connectors.
   2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE
      
      

      Tester Connection	Condition	Specified Condition
      F1-5 (ATX+) - F1-15 (ATX-)	Always	60 to 80 Ω
      F23-9 (TX+) - F23-10 (TX-)	Always	60 to 80 Ω
      F24-9 (TXM+) - F24-10 (TXM-)	Always	60 to 80 Ω

   NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL  )

   OK: Go to next Step 

4. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - 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  (See ).
   1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the display and navigation module display and the component shown by the subcode.
      1. Disconnect all connectors between the display and navigation module display and the component shown by the sub-code.
      2. Check for an open or short in the AVC-LAN circuit between the display and navigation module display and the component shown by the sub-code.

         OK: There is no open or short circuit. 

   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. 

   NG: REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY  (See REMOVAL )

   OK: END