Inspection Procedure

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" Mode

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 REFERENCE
   
   

   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)*5	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  )
   Parking assist ECU (1AC)*3	Parking assist ECU power source circuit (see ECU POWER SOURCE CIRCUIT )
   Rear power seat module switch (1C0)	Rear seat control switch power source circuit (see REAR SEAT CONTROL SWITCH POWER SOURCE CIRCUIT  )
   Satellite radio tuner (1F1)*4	Satellite radio tuner power source circuit (see SATELLITE RADIO TUNER POWER SOURCE CIRCUIT  )
   HINT: *1: w/ Rear Seat Entertainment System *2: w/ Disc Player *3: w/ Advanced Parking Guidance System *4: w/ Satellite Radio Tuner *5: w/ Navigation System (for DVD)

Fig 2: Identifying L53, L51, L57 And L52 Receiver Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L53, L51, L57 and L52 receiver connectors.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance: 

   for CD changer models 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
   L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
   L57-9 (TX+) - L57-10 (TX-)	Always	60 to 80 Ω

   for DVD changer models 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
   L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
   L52-9 (TX+) - L52-10 (TX-)	Always	60 to 80 Ω

   NG: REPLACE RADIO RECEIVER ASSEMBLY (See  REMOVAL   ) 

   OK: Go to Next Step 

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 

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 MULTI-DISPLAY (See  REMOVAL   ) 

   OK: END