Page 2193 of 3115
2004 LAND CRUISER (EWD548U)
186Multiplex Communication System
B 7(
A)
, B 8(
B)
, B 9(
C)
Lock Unlock
3 12
Lock Unlock
1 32
BQ2 2BQ210 BP41 BP49 24 2K 12 2Q14 3J 40 3E
42 3Q3I 83Q302K 29 2Q 11 A 22
BP4 8 BP43 ID4 17 ID418 B 4B3
11 10 2K82E
26 3K 15 3E B 23 B24
D14
D15D27 D19
B 3
W- B
SB
R- Y
L- YSB SB
SB
W- B W- B
W- B
SB
R- Y
SB SB
SB W- B
G- B SB
G- B
L- W G- B
W- B
G- B
W- B
L- Y
W- BL
V
R- Y
R- BL
VL
V
R- Y
R- B G- B
W- B
L- Y
W- BL- WSB
G- B UL2 L2 RDA PRG DCTY
20
51 23 BQ2 1
L- W
PCTY
B1 1
BJ W- B
W- B
R- L
R- L
Back Door Key Lock
and Unlock SW
Door Courtesy SW
Front LH
Door Courtesy SW
Front RHDoor Key Lock and
Unlock SW RH
Body ECU
Door Contr ol Receiver+B E RDA PRG
W- BW- B
Page 2194 of 3115
2004 LAND CRUISER (EWD548U)
187
B 7(
A)
, B 8(
B)
, B 9(
C)
11
1 2 B 11 B12
ID4 15 IV37ID4 16B 7
C C
BP4 11
BH2 4
D16
D17
J22 B 2
SB
R- Y
SB SB
SB W- BIG1 6IU4 47. 5A
ACCFrom Power Source System (
See Page 94)
2Q 577. 5A
MET
3Q 7
R- L
R- GR- L
R- G
R- L R- L R- L R- L R- L
R- Y SB R- Y W- B
SB
SB
SB
SB
SB
SB
SB
SB
SB
SB RLCY RRCY BCTY
R- LR- L 10A
GAUGE1
2Q 65
SB
A A
J14
SB Back Door
Courtesy SWDoor Courtesy SW
Rear LH
Door Courtesy SW
Rear RH
Body ECU
Junction Connector
Junction
Connector ACC
22
W- BW- B BH1 5(
*1)
(
*2)
* 2 : w/o Navigation System * 1 : w/ Navigation System
Page 2195 of 3115
2004 LAND CRUISER (EWD548U)
188Multiplex Communication System
B 7(
A)
, B 8(
B)
, B 9(
C)
DoorBeam C12(
A)
, C13(
B)
, C14(
C)
, C15(
D)
D 11 D12 D13 D14 A 7A10 D 9D10 A3 A 5B8 93Q 19 3EC 12
IU3 3C 11
SB
SB
SB
SB
SB
SB SB7. 5A
PANEL Fr om Power Source System
(
See Page 94)
1B 63
83 2Q 11 2B
SB
SB SB
SBSB
SB
SB
GG- Y R- Y
DCY2 DRLP
SB
SB
IX1 6
EB1 10D 15
13
2
SB R- G
R- G
BR R- L
Buzzer Combination Meter
Body ECU
Vehicle Speed Sensor
(
Combination Meter) V 2
W- BW- B SB
SB Speedometer
Page 2196 of 3115
2004 LAND CRUISER (EWD548U)
189
B 7(
A)
, B 8(
B)
, B 9(
C)
BEAKE
C 18 D20 D 1C 1D16 D19 37 2Q 14 2E
IX1 8
ECB 2
27 2K 31 2Q
1IU1 9
12 4C34F
10 4A64E
34C 44E
C 3A 19 A39
D 18 E12
66 2Q 24 2EE 8(
D)
, E 9(
E)
MPX2 MPX+ MPX-411
MPX1 ELS TC
R- W
B
B
P- B P- BB B P- B
G- W
W- LSB
SB
SB
SB
SB
R- W
SB
W- L
G- W PKB
G 4
C12(
A)
, C13(
B)
, C14(
C)
, C15(
D) SB
SB
(
*1)
(
*1)
* 1 : w/ Navigation System
(
*1)
(
*1)
D 29
SB
MPD1 MPD2
P 8
A45(
A)
, A47(
C)
BR
BR BR
Combination Meter
Engine Control Module
Gateway ECU
Parking Brake SW
A/C Control Assembly
Body ECU
W- BW- B
EB19
BR
Page 2197 of 3115
2004 LAND CRUISER (EWD548U)
190Multiplex Communication System
B 7(
A)
, B 8(
B)
, B 9(
C)
B2Q 70
BA 13
18 2K 10 2G
BU1 3
BM2 5
2
BM2 4
BU1 1 SB
W- L
G- W3E 21
3E 26 3D13
4A 8
4A 17C 5
Multi- Display
A 15
10 5C15B
J14IU3 4
IF1 4C 18
5
TC
R 6
B G G- W G- W
G G G W- B W- B W- B
BSB
TC DBKL ELS1 SPD
14
SB
SB
W- L W- L
W- L W- L
ACAN
Rheostat Body ECU
Junction Connector
Center Airbag
Sensor Assembly
3 1Buckle SW LH B 5 GW- L
Radio and Player
64B
W- B
Page 2198 of 3115
2004 LAND CRUISER (EWD548U)
191
B 7(
A)
, B 8(
B)
, B 9(
C)
2G 8
2B 6 14 A
2G 4
2Q 7 23 A
3Q 37
3F 73D41
22
MPX2
C263
MPX1
T 7 1B 38
1A 40
4
L
G 12L 9
2
PWS
M 2
IF IG
B- O
B
BB
SBB
B
416 L MPX2 PWS GND1 GND2
L
21
(
w/ Side Airbag)
Center Airbag
Sensor Assembly GeneratorMoon Roof Control
ECU
Tilt and
Telescopic ECUBody ECU
3
G- W
2D 35STPI
B- O
EE1 215A
STOP From Power Source System (
See Page 94)
2D 31
1 2
G- R Stop Light SW S 5
Page 2199 of 3115

2004 LAND CRUISER (EWD548U)
192Multiplex Communication System
The multiplex communication system communicates among the body ECU, theft deterrent ECU, power window master SW,
power window control SW front RH, power window control SW rear LH, power window control SW rear RH, center airbag
sensor assembly and tilt and telescopic ECU, among the combination meter, engine control module, A/C control assembly
and gateway ECU and controls the following systems according to the signals from respective sensors or switches.
For details, please refer to the new car features and/or the repair manual.
Body ECU
11, 12-Ground : Always approx. 12 volts
22-Ground : Approx. 12 volts with ignition SW at ACC or ON position
10-Ground : Approx. 12 volts with ignition SW at ON or ST position
4, 16-Ground : Always continuity
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
A3170D1872J1471
A45A70D1972J2272
A47C70D2072M272
B272D2172M5A71
B372D2272M9B71
B472D2372P169
B574D2472P873
B7A70D2772P1273
B8B70E368P1473
B9C70E8D70P1573
C12A70E9E70P1673
C13B70F168P1773
C14C70F268P1873
C15D70F1072P1973
C1670F1172P2073
C2670F1568R671
D2A68G168R2773
D3B68G470S571
D770H169T169
D1072H269T571
D1172H369T771
D1272H469T1071
D1372J371U171
D1472J671V269
D1572J971V673
D1672J1071V773
D1772J1371Z171
System Outline
Service Hints
Page 2200 of 3115

2004 LAND CRUISER (EWD548U)
193
:Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A24Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1B24Engine Room No 2 Wire and Engine Room J/B (Engine Compartment Left)1C24Engine Room No.2 Wire and Engine Room J/B (Engine Compartment Left)
2A28Engine Room No 2 Wire and Cowl Side J/B LH (Left Kick Panel)2B28Engine Room No.2 Wire and Cowl Side J/B LH (Left Kick Panel)
2D
2E28Dash Wire and Cowl Side J/B LH (Left Kick Panel)
2G
()
2I28Front Door LH Wire and Cowl Side J/B LH (Left Kick Panel)2J28Front Door LH Wire and Cowl Side J/B LH (Left Kick Panel)
2K28Floor No.1 Wire and Cowl Side J/B LH (Left Kick Panel)
2L28Roof No.1 Wire and Cowl Side J/B LH (Left Kick Panel)
2Q30Instrument Panel Integration Wire and Cowl Side J/B LH (Left Kick Panel)
3B40Engine Room No.2 Wire and Cowl Side J/B RH (Right Kick Panel)
3D
3E40Dash Wire and Cowl Side J/B RH (Right Kick Panel)
3F
(g )
3I40Front Door RH Wire and Cowl Side J/B RH (Right Kick Panel)3J40Front Door RH Wire and Cowl Side J/B RH (Right Kick Panel)
3K40Floor No.2 Wire and Cowl Side J/B RH (Right Kick Panel)
3P43Dash Wire and Cowl Side J/B RH (Right Kick Panel)
3Q42Instrument Panel Integration Wire and Cowl Side J/B RH (Right Kick Panel)
4A
4B
4C52Dash Wire and J/B No 4 (Instrument Panel Center)4D52Dash Wire and J/B No.4 (Instrument Panel Center)
4E
4F
5B56Dash Wire and J/B No 5 (Behind the Combination Meter)5C56Dash Wire and J/B No.5 (Behind the Combination Meter)
5D56Engine Room No.2 Wire and J/B No.5 (Behind the Combination Meter)
6D60Engine Wire and J/B No.6 (Behind the Grove Box)
7B64Dash Wire and J/B No.7 (Behind the Grove Box)