Inspection Procedure

HINT:

Only vehicles with a navigation system (for DVD) or without a navigation system (w/ multi-display) have this circuit.

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:

      • "110 (multi-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 "
        Fig 1: Screen Display - LAN Monitor

        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

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

      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  )
      Navigation ECU (178)*3	Navigation ECU power source circuit (see NAVIGATION ECU POWER SOURCE CIRCUIT )
      Clock (1D6)	Clock power source circuit (see CLOCK POWER SOURCE CIRCUIT )
      Television display (1F6)	Television display power source circuit (see TELEVISION DISPLAY POWER SOURCE CIRCUIT  )
      Disc player (1A0)*2	Disc player controller power source circuit (see DISC PLAYER CONTROLLER POWER SOURCE CIRCUIT  )
      Rear power seat module switch (1C0)*4	Rear seat control switch power source circuit (see REAR SEAT CONTROL SWITCH POWER SOURCE CIRCUIT  )
      HINT: *1: w/ Rear Seat Entertainment System *2: w/ Disc Player *3: w/ Navigation System (for DVD) *4: w/ Rear Power Seat Module Switch

3. INSPECT RADIO RECEIVER ASSEMBLY 
   Fig 2: Identifying Radio Receiver's L51, L52 and L53 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the L51, L52 and L53 receiver connectors.
   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
      L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
      L52-9 (TX+) - L52-10 (TX-)
      L53-9 (TXM+) - L53-10 (TXM-)

   NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL  )

   OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT SHOWN BY SUBCODE) 

   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, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code.
      1. Disconnect all connectors between the multi-display and the component shown by the sub-code.
      2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component shown by the sub-code

         OK: There is no open or short circuit. 

         Fig 3: AVC-LAN Wiring Diagram

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. REPLACE COMPONENT SHOWN BY SUB-CODE WITH NORMAL ONE AND CHECK 
   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 

      RESULT CHART
      
      

      Result	Proceed to
      OK	A
      NG (w/ Navigation System)	B
      NG (w/o Navigation System)	C

   B: REPLACE MULTI-DISPLAY  (see REMOVAL )

   C: REPLACE MULTI-DISPLAY  (See REMOVAL  )

   A: END