Lexus RX300 (MCU15). Manual — part 392
I11572
Radio Receiver Assembly
Multi Display
Navigation ECU
Terminator
DI–798
–
DIAGNOSTICS
LEXUS NAVIGATION SYSTEM
LEXUS RX300 (RM785E)
AVC–LAN (Communication bus) Circuit
CIRCUIT DESCRIPTION
Each unit of navigation system connected with AVC–LAN (communication bus) transfers the signal of each
switch by communication.
When +B short and GND short occur in this AVC–LAN, navigation system will not function normally as the
communication is discontinued.
In this AVC–LAN, multi display becomes the master of the communication, and the radio receiver assembly
has a terminator necessary for transmitting the communication.
multi display is connected between navigation ECU and radio receiver assembly, navigation system has the
structure that makes communication impossible without navigation ECU, multi display or radio receiver as-
sembly.
AVC–LAN
DI84O–01
I19279
P–B
GR–R
W
TX1+
N4
5
I17
Instrument Control Panel
Radio and
Player
C6
CD Automatic
Changer
Instrument Panel J/B
Stereo Component
Amplifier
Multi
Display
Navigation
ECU
W
IN1
2
M4
5
TX1+
LHD Vehicle:
B–W
TX+
P–B
B
N4
10
B
IN1
11
M4
10
TX1–
TX1–
TX–
10
9
4
11
TX+
TX–
TX1+
TX1–
3
10
Y
M3
4
M3
11
TX3+
TX3–
TX+
TX–
M3
3
P
IK1
R–W
GR–R
16
(*1)
M3
10
R7
9
TX–
TX+
TX+
TX–
R7
10
R6
5
R6
15
P
S17
1
TX+
TX–
FL+
FL–
S15
20
P
BD1
2
P
LG
IK1
15
LG
S17
8
S15
9
V
BD1
11
P
(*2)
AUI+
AUI–
AUO–
AUO+
N3
1
N3
10
V
(*1)
V
(*2)
N3
11
N3
2
(*1)
B–Y
T9
Tweeter LH
1
(*1)
IA2
9
IA2
1
V
P
1D
4
1D
11
1F
1
V
1J
1
1J
3
1F
5
V
P
1
2
P
3
1C1
P
8 1C1
2
F14
Front Door Speaker LH
V
: AVC–LAN circuit
*1: w/ LEXUS Navigation System
*2: w/o LEXUS Navigation System
–
DIAGNOSTICS
LEXUS NAVIGATION SYSTEM
DI–799
LEXUS RX300 (RM785E)
WIRING DIAGRAM
I19280
P–B
GR–R
W
TX1+
N4
5
Instrument
Control Panel
C6
CD Automatic
Changer
Multi
Display
W
IN1
2
M4
5
TX1+
RHD Vehicle:
B–W
TX+
P–B
B
N4
10
B
IN1
11
M4
10
TX1–
TX1–
TX–
10
9
TX+
TX–
TX1+
TX1–
3
Y
M3
4
M3
11
TX3+
TX3–
TX+
M3
3
Navigation
ECU
(*1)
R–W
(*2)
M2
5
(*2)
M2
4
(*1)
I17
(*1)
10
I17
(*1)
7
I16
(*2)
11
I16
(*2)
4
I17
(*1)
6
I16
(*2)
11
I17
(*1)
10
I16
(*2)
O
TX–
M2
6
M3
10
M2
7
(*2)
(*1)
(*2)
(*1)
(*2)
(*1)
GR–R (*1)
W–R (*2)
Radio and
Player
P
R5
1
TX–
TX+
TX+
TX–
R5
2
R6
5
R6
15
LG
R7
9
(*2)
(*1)
R7
10
(*2)
(*1)
P–B
O (*2)
(*1)
R4
9
R4
10
(*2)
(*1)
(*2)
(*1)
Stereo Component Amplifier
S17
1
TX+
FR+
FR–
S15
7
P
S17
8
S15
8
TX–
LG
L
LG
L (*4)
L (*3)
LG (*4)
LG (*3)
R–W
AUI+
AUI–
AUO–
AUO+
N3
1
N3
10
N3
11
N3
2
(*3)
B–Y
(*3)
15 IK1
16 IK1
2 BD1 11 BD1
IN1
1
IN1
10
B–Y
T10
Tweeter RH
1
2
3
4
L
LG
Instrument Panel J/B
1J
1
1F
1
1J
3
1F
5
L
IL1
8
IL1
3
L
LG
1
2
F15
Front Door Speaker RH
: AVC–LAN circuit
*1: Europe
*2: Except Europe
*3: w/ LEXUS Navigation System
*4: w/o LEXUS Navigation System
LG
DI–800
–
DIAGNOSTICS
LEXUS NAVIGATION SYSTEM
LEXUS RX300 (RM785E)
–
DIAGNOSTICS
LEXUS NAVIGATION SYSTEM
DI–801
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
1
Check wire harness and connector between radio receiver assembly and naviga-
tion ECU (See page IN–32).
NG
Repair or replace wire harness or connector be-
tween radio receiver assembly and navigation
ECU.
OK
2
Check wire harness and connector between multi display and navigation ECU
(See page IN–32).
NG
Repair or replace wire harness or connector be-
tween multi display and navigation ECU.
OK
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст