Inspection Procedure

1. w/ Navigation System for HDD:

   Refer to the display and navigation assembly power source circuit (see DISPLAY AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT ).

2. w/ Navigation System for DVD:

   Refer to the multi-display power source circuit (see MULTI-DISPLAY POWER SOURCE CIRCUIT ).

3. w/o Navigation System:

   Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT  .

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

Fig 1: 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 

1. Enter the diagnostic mode
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode
3. Identify the component which has stored this code

   Component table 

   COMPONENT CHART
   
   

   Display	Component
   AUDIO	Radio receiver
   DSP-AMP	Stereo component amplifier
   NAVI*5	Navigation ECU
   CLOCK	Clock
   RSE*1	Television display
   DVD-P*2	Disc player
   CAMERA-C*3	Parking assist ECU
   Rr-CONT*6	Rear power seat module switch
   XM*4	Satellite radio tuner
   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 *6: w/ Rear Power Seat Module Switch "NAVI" is the component which has stored this code in the example shown in the illustration

   Fig 2: Screen Display - LAN Monitor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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 which has stored this code.
   1. Disconnect all connectors between the multi-display and the component which has stored this code.
   2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this 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 

HINT:

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 radio receiver.
   1. Disconnect all connectors between the multi-display and the radio receiver.
   2. Check for an open or short in the AVC-LAN circuit between the multi-display and the radio receiver.

      OK: There is no open or short circuit. 

      Fig 4: AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. w/ Navigation System for HDD:

   Replace the display and navigation assembly with a normal one and check if the same problem occurs again (see REMOVAL )

2. w/ Navigation System for DVD.

   Replace the multi-display with a normal one and check if the same problem occurs again (see REMOVAL ).

3. w/o Navigation System (w/ Multi-display):

   Replace the multi-display with a normal one and check if the same problem occurs again (see REMOVAL  ).

   OK: Same problem does not occur. 

NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

OK: END