Toyota Sequoia (2005). Manual - part 586

I28592

Multi–display
Controller Sub–assy

R25 
Television Display Assy

IF4

9

LG

5

TX2+

ID2

17

R21

LG

LG

IF4

10

LG

4

TX2–

ID2

18

R21

LG

LG

TX+

TX–

LG

31

TX+

IF3

14

R23

L

LG

30

TX–

IF3

15

R23

LG

TX+ (*1)

9

10

9

10

 R27 (*1)

Radio and Navigation Assy

 R19 (*2)

Radio Receiver Assy

D23 
Disc Player Controller

13

TX3–

R22

LG

14

TX3+

R22

TX–

TX+

18

17

LG

*1: w/ Navigation System
*2: w/o Navigation System

TX1+ (*2)

TX– (*1)

TX1– (*2)

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

DI–2139

2333

AVC–LAN circuit

CIRCUIT DESCRIPTION

Each unit of this system connected to the AVC–LAN (communication bus) transfers the signal of each switch
by communication.
When a short to +B or short to ground occurs in this AVC– LAN, this system will not function normally as
communication is discontinued.
This system has 2 kinds of AVC–LAN: main AVC–LAN and sub AVC–LAN.
w/ navigation system:
In the main AVC–LAN, the radio and navigation assy becomes the communication master and has enough
resistance necessary for communication.
w/o navigation system:
In the main AVC–LAN, the radio receiver assy becomes the communication master and has enough resis-
tance necessary for communication.
In the sub AVC–LAN, the multi–display controller sub–assy becomes the communication master and has
enough resistance necessary for communication.

WIRING DIAGRAM

DIDBJ–01

DI–2140

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

2334

INSPECTION PROCEDURE

1

Inspect apparatus.

CHECK:
Choose the apparatus to be inspected.
RESULT:

Television display assy

Go to step A

Radio and navigation assy (w/ Navigation System)

Go to step B

Radio receiver assy (w/o Navigation System)

Go to step C

Disc player controller

Go to step D

B

Go to step 4.

C

Go to step 6.

D

Go to step 7.

A

2

Service check mode (Television display assy).

CHECK:
Perform the service check (See page 

DI–2099

).

Start the diagnosis system and read the check result for the television display assy.

RESULT:

”NCON” is displayed or result is not displayed (Rr–TV)

Go to step A

”GOOD” is displayed

Go to step B

HINT:



This system has 2 kinds of AVC–LAN: main AVC–LAN and sub AVC–LAN. The television display is
connected for the sub AVC–LAN.



Perform the communication check for the diagnosis system (See page 

DI–2097

).

B

Replace multi–display controller sub–assy.

A

I28616

Television Display Assy:

TX+

TX–

Multi display Controller Sub–assy:

TX2+

TX2–

R25

R21

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

DI–2141

2335

3

Check harness and connector (Television display assy – Multi–display controller
sub–assy).

PREPARATION:
Disconnect the R21 and R25 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Symbol (Tester connection)

Condition

Specified condition

TX+ (R25–9) – TX2+ (R21–5)

Always

Below 1 

Ω

TX– (R25–10) – TX2– (R21–4)

Always

Below 1 

Ω

TX+(R25–9) – Body ground

Always

10 k

Ω 

or higher

TX– (R25–10) – Body ground

Always

10 k

Ω 

or higher

NG

Repair or replace harness or connector.

OK

Replace television display assy.

DI–2142

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

2336

4

Service check mode (Multi–display controller sub–assy).

CHECK:
Perform the service check (See page 

DI–2099

).

Start the diagnosis system and read the check result for the radio and navigation assy.

RESULT:

”NCON” is displayed or result is not displayed (RSE ECU)

Go to step A

”GOOD” is displayed

Go to step B

HINT:



This system has 2 kinds of AVC–LAN: main AVC–LAN and sub AVC–LAN. The television display is
connected for the sub AVC–LAN.



Perform the communication check for the diagnosis system (See page 

DI–2097

).

B

Replace radio and navigation assy.

A