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 below.
   • The sub-code will be indicated by its physical address.
   • For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
     Fig 1: Diagnostic Tool 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.

   DISPLAY 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  )
   Clock (1D6)	Clock power source circuit (see CLOCK POWER SOURCE CIRCUIT )
   Television display (1F6)*1	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

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

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 

   RESISTANCE SPECIFICATION CHART
   
   

   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 

   RESISTANCE SPECIFICATION CHART
   
   

   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 display and navigation assembly and the component shown by the sub-code.
   1. Disconnect all connectors between the display and navigation assembly 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 assembly 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 DISPLAY AND NAVIGATION ASSEMBLY  (See REMOVAL )

OK: END