Toyota Sequoia (2005). Manual - part 578

DIDB4–01

I28485

Multi–display
Controller Sub–assy

R25 
Television Display Assy

IF4

ACC

GND

8

7

IF4

IF4

1

Y

LG

Y

1

2

6

+B2

ACC2

GND1

BU+B

ID2

8

7

ID2

ID2

1

R21

R21

R21

Y

LG

Y

Y

LG

Y

8

7

1

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

DI–2107

2301

CIRCUIT INSPECTION

Power source circuit (Television display assy)

CIRCUIT DESCRIPTION

This circuit provides power to the television display assy. The power is sent from the battery to the television
display assy through the multi–display controller sub–assy.

WIRING DIAGRAM

I28613

ACC

BU+B

GND

R25

Television Display Assy:

DI–2108

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

2302

INSPECTION PROCEDURE

1

Inspect television display assy (BU+B, ACC, GND).

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

Symbol (Tester connection)

Condition

Specified condition

GND (R25–1) – 

Body ground

Always

Below 1 

Ω

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Symbol (Tester connection)

Condition

Specified condition

BU+B (R25–8) – 

GND (R25–1)

Always

10 to 14 V

ACC (R25–7) – 

GND (R25–1)

Ignition SW ACC

10 to 14 V

OK

Go to step 3.

NG

I28616

Television Display Assy:

Multi–display Controller Sub–assy:

R25

R21

ACC

BU+B

GND

ACC2

+B2

GND1

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

DI–2109

2303

2

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

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

Symbol (Tester connection)

Condition

Specified condition

BU+B (R25–8) – +B2 (R21–1)

Always

Below 1 

Ω

ACC (R25–7) – ACC2 (R21–2)

Always

Below 1 

Ω

GND (R25–1) – GND1 (R21–6)

Always

Below 1 

Ω

BU+B (R25–8) – Body ground

Always

10 k

Ω 

or higher

ACC (R25–7) – Body ground

Always

10 k

Ω 

or higher

GND (R25–1) – Body ground

Always

10 k

Ω 

or higher

NG

Repair or replace harness or connector.

OK

Replace multi–display controller sub–assy.

3

Check problem symptoms table.

CHECK:
Check the problem symptoms table.
RESULT:

All possible suspected areas have been inspected

Go to step A

Possible suspected areas still exist

Go to step B

B

Proceed to next circuit inspection shown in
problem symptoms table or diagnostic trouble
code chart (See page 

DI–2087

 or 

DI–2103

).

A

Replace television display assy.

I28486

J/C

Sub J/B No.3

R23

32

Multi–display Controller Sub–assy

ACC

R23

16

+B1

R23

29

GND

IF3

1

IF

C

4

3

A36
ACC 
Cut Relay

B

1

I18 
Ignition SW

12

12

3A

W–R

W–R

1

To ECM

IA1

26

L–R

L–R

2D

1

2C

8

Engine Room J/B

RAD No. 1

ECU–B

Short Pin

3

W–L

2

W–R

1C

3

1E

1J

W

IL

1

IC

6

AM1

8

F10
FL Block

ALT

5

4

B

Battery

IM

13

LG

GR

GR

L–Y

GR

2

2

Engine Room R/B No. 2

Y

IF3

3

W–B

3A

W–R

1

IF3

2

2B

P

3

ACC

AM1

B

B

1

2

W–L

B–O

J37

J38

L–Y

Y

RAD No. 2

1

Instrument Panel J/B

2

1

RSE

2C

P

DI–2110

–

DIAGNOSTICS

REAR SEAT ENTERTAINMANT SYSTEM

2304

Power source circuit (Multi–display controller sub–assy)

CIRCUIT DESCRIPTION

This circuit provides power to the multi–display controller sub–assy.

WIRING DIAGRAM

DIDB5–01