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:

   • "118 (display and navigation assembly)" 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: Display - LAN Monitor Screen

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Inspect the power source circuit of the component shown by the sub-code

   Component table 

   COMPONENT CHART
   
   

   Component	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 )
   Satellite radio tuner (1F1)	Satellite radio tuner power source circuit (see SATELLITE RADIO TUNER POWER SOURCE CIRCUIT  )
   Clock (1D6)	Clock power source circuit (see CLOCK POWER SOURCE CIRCUIT )
   Disc player (1A0)	Disc player power source circuit (see DISC PLAYER CONTROLLER POWER SOURCE CIRCUIT )
   Parking assist ECU (280)	Parking assist ECU power source circuit (see ECU POWER SOURCE CIRCUIT )
   Display and navigation assembly (118)	Display and navigation assembly power source circuit (see DISPLAY AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT  )
   Rear power seat module switch (1C0)	Rear power seat module switch power source circuit (see REAR SEAT CONTROL SWITCH POWER SOURCE CIRCUIT  )

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

Fig 2: Identifying L51, L52 And L53 Radio Receiver 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 

   RESISTANCE SPECIFIED CONDITIONS
   
   

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

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 below, check the AVC-LAN circuit between the rear power seat module switch and the component shown by the subcode.
   Fig 3: AVC-LAN Wiring Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect all connectors between the rear power seat module switch and the component shown by sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the rear power seat module switch 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 

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 (for Power Seat)	B
   NG (for Ottoman)	C
   NG (for Fixed Seat Type)	D

B: REPLACE REAR POWER SEAT MODULE SWITCH ASSEMBLY  (See REMOVAL )

C: REPLACE REAR POWER SEAT MODULE SWITCH ASSEMBLY  (See REMOVAL )

D: REPLACE REAR POWER SEAT MODULE SWITCH ASSEMBLY  (See REMOVAL )

A: END