Toyota Sequoia (2005). Manual - part 548

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DIAGNOSTICS

AUDIO SYSTEM

DI–1987

2181

E0

*1

Registration Completion

Instruction Error

”Registration Completion Instruction” command
from master cannot be received.

Since this DTC is provided for engi-

neering, it may be detected when no

actual failure exists.

–

E3

*1

Registration Request Transmis-

sion

Registration Request command is output from

slave component.

Registration Request command is output from

sub–master component.

Since this DTC is provided for engi-

neering, it may be detected when no

actual failure exists.

–

DF

*4

Master Error

Due to defective condition of component with a
display, master function is switched to audio
equipment.
Error occurs in communication between sub–
master (audio) and master component.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Multi–display controller sub–

assy).

3. Replace Multi–display controller

sub–assy.

DI–1990

DI–2139

–

E4

*1

Multiple Frame Abort

Multiple frame transmission is aborted.

Since this DTC is provided for engi-

neering purpose, it may be detected

when no actual failure exists.

–

HINT:

*1: Even if no failure is detected, this code may be stored depending on the battery condition or voltage
for starting an engine.

*2: This code is stored when 180 sec. has passed after the power supply connector is pulled out after
engine start.

*3: This code may be stored when the engine key is turned back to the ON position and then turned
again to the START position in 1 minute after engine start.

*4: This code may be stored when the engine key is turned back to the ON position and then turned
again to the START position after engine start.

Rear seat audio controller (Physical address: 1F4) [RSA]
(a)

Logical address: 01 (Communication control)

DTC

Name

Diagnosis

Verification

See page

D6

*1

Absence of Master

Component in which this code is recorded has
been disconnected from system with ignition in
ACC or ON. Or, when this code was recorded,
RSA panel was disconnected.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

D7

*2

Connection Check Error

Component in which this code is recorded has
been disconnected from system after engine start.
Or, when this code was recorded, RSA panel was
disconnected.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

DC

*3

Transmission Error

Transmission to component shown by sub–code

has been failed.

(This code does not necessarily mean actual fail-

ure.)

If same sub–code is recorded in

other component(s), check harness

for power supply and communica-

tion system of all components

shown by code.

–

DD

*4

Master Reset (Momentary Inter-

ruption)

Component that is to be master has been discon-
nected after engine start.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

DI–1988

–

DIAGNOSTICS

AUDIO SYSTEM

2182

E0

*1

Registration Completion

Instruction Error

”Registration Completion Instruction” command

from master cannot be received.

Since this DTC is provided for engi-

neering, it may be detected when no

actual failure exists.

–

E3

*1

Registration Request Transmis-

sion

Registration Request command is output from

slave component.

Registration Request command is output from

sub–master component.

Since this DTC is provided for engi-

neering, it may be detected when no

actual failure exists.

–

DF

*4

Master Error

Due to defective condition of component with a
display, master function is switched to audio
equipment.
Error occurs in communication between sub–
master (audio) and master component.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

E4

*1

Multiple Frame Abort

Multiple frame transmission is aborted.

Since this DTC is provided for engi-

neering purpose, it may be detected

when no actual failure exists.

–

D8

*2

No Response To Connection

Check

Component shown by sub–code is or had been
disconnected from system after engine start.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

D9

*1

Last Mode Error

Component operated (sound and/or image was
provided) before engine stop is or was discon-
nected with ignition switch in ACC or ON.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

DA

No Response to ON/OFF

Instruction

No response is identified when changing mode
(audio and visual mode change).
Detected when sound and picture does not
change by button operation

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

DB

*1

Mode Status Error

Dual alarm is detected.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

DC

*4

Transmission Error

Transmission to component shown by sub–code

has been failed.

(This code does not necessarily mean actual fail-

ure.)

If same sub–code is recorded in

other component(s), check harness

for power supply and communica-

tion system of all components

shown by code.

–

DE

*3

Slave Reset (Momentary Inter-

ruption)

After engine start, slave component has been dis-
connected.

1. Power source circuit (Radio re-

ceiver assy).

2. AVC–LAN (Radio receiver assy

– Rear seat audio controller).

3. Replace Rear seat audio control-

ler.

DI–1990

DI–2061

–

HINT:

*1: Even if no failure is detected, this code may be stored depending on the battery condition or voltage
for starting the engine.

–

DIAGNOSTICS

AUDIO SYSTEM

DI–1989

2183

*2: When 210 sec. has passed after pulling out the power supply connector of the master component
with the ignition switch in ACC or ON, this code is stored.

*3: This code may be stored when the engine key is turned 1 min. again after engine start.

*4: This code may be stored when the engine key is turned again after engine start.

I28499

Built–in Type Amplifier:

Radio Receiver Assy

A36 
ACC Cut Relay

Sub J/B No. 3

Instrument Panel J/B

Engine Room J/B

To ECM

Battery

IF

R2

R2

R2

12

3A

1

3A

1

4

3

W–R

2

GR

B

C

B–O

J37

J38

IA1

24

L–Y

L–Y

GR

2B

2C

8

2D

1

RAD No. 1

ECU–B

Short Pin

3

W–R

BR

B

RAD No. 2

3

1

6

AM1

2

12

1

P

3

1

ALT

5

B

I18 
Ignition SW

W–L

1

2

A

ACC+B

GND

BU+B

4

3

7

W–R

1J

1E

1L

1C

1C

1F

ACC

AM1

GR

8

F10
Fusible Link Block

4

W

J/C

J12 
Junction 
Connector

DI–1990

–

DIAGNOSTICS

AUDIO SYSTEM

2184

CIRCUIT INSPECTION

Power source circuit (Radio receiver assy)

CIRCUIT DESCRIPTION

This circuit provides power to the radio receiver assy.

WIRING DIAGRAM

DID9U–01