2001 TOYOTA SEQUOIA engine

I28431
Back Door ECU
ILE B118
2 1
R±L S8
Step Light
LGLP
B117 BF18
BD29
W W
W
W
WR
R
R
R
R
R
R B
BAA 1G6
1G13
1G14
1E8
1J5
2C3
2D1SHORT PIN
DOME
4
5F10
FL Block
Battery3C
3A J21
J/C
BD211
2R±L BF13 L2
Luggage Room Light Instrument Panel J/B
Engine Room J/BInstrument Panel J/B
DOOR
ONOFF J29
J/C
MF
J29J30
6
16 Sub J/B No. 3
2
IN1
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1867
2061 Author: Date:
2005 SEQUOIA (RM1146U)
Luggage Room Light Circuit
CIRCUIT DESCRIPTION
When the luggage room light and the rear room light are turned to the DOOR position, and any door is
opened, voltage is applied to the LGLP terminal of the back door ECU, and voltage is output from the ILE
terminal.
WIRING DIAGRAM
DI57L±11

I28467
F18
Front Passenger Door ECUD22
Driver Door ECU
Body ECU
J/C
I18
Ignition Switch
Instrument Panel J/B
Sub J/B No. 3
F10
FL Block
Sub J/B No. 3Instrument Panel J/B
Engine Room R/B J8
J/C
Battery
IEECU±B
Short Pin
ECU±IG
AM1
PWR No. 1 J/CB7 IB1
II2
J6 J7
J37 J38IB1
IB1
IB1
3C 3A 1F 1C
1L
1E 1J
2D 2C1C
1F
3C 3A ALTIG1 AM1IB1MPX1
MPX2
GND
SIGCPUB
BDR MPX2
MPX1W±L
W±R
L±W G±B
W±B
B±RW±L
G±B
G±B
W±B
B±RW±R
W±L
B±Y
B±RB±R
W±L
L±W
W±RW
W±R
W±R BBD
AF
AA48
9 1122
23
251 3
13 20
13 8
21
88 4 4
1
1 6
12
48 5
11 23
1821
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1909
2103 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28468
MPX2MPX1 D22
Driver Door ECU
Back Door ECU
IB1F18
Passenger
Door ECU
J/CII2
BF1 BD2 B11
J37 J38J/CJ34 J33 II2
II2MPX2
MPX1
SIG
BDR
GND F18 F18
F18 F18
F18 F18
F18 F18
F18 F18
F18 F18 G±B
B
B±R G±B G±B
BB B B
B±R
B±R
B±R B±Y
W±L
L±Y
L±Y
B
W±R
W±R
W±R
W±R
W±B A J12
J/C
Battery
IFII2
II2 Sub J/B No. 3
3D 3A11
611
13 8(*1) (*2) 23 12(*1) (*2) 2520
(*1)(*2) 21 19(*1) (*2) 20 10(*1) (*2) 811(*1) (*2)
Engine Room J/B
ECU±B
Short Pin
2D 2C18Instrument Panel J/B
1E 1J2 3II2 F10
Fusible Link Block
ALT
48 5Instrument Panel J/B
ECU±IG
AM1
PWR No. 2 1F 1C
1L 1C
1F 44
1
176
12 Sub J/B No. 3
3C 3A88I18
Ignition SW
IG1 AM14 8
8 2 1
14AG
2 7
(*1): w/ Driving Position Memory
(*2): w/o Driving Position Memory20
AA
3
B1
W±BCPUB W DI±1912
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2106 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28469
I19
Integration Control
and Panel
Body ECU
I18
Ignition SW Combination Meter
F10
FL Block
To Ignition
Switch J43
J/C
IG BatteryDOME ALTAM1CIG
ACC
AM1
Short Pin
J/CMPX±
ACC
+B MPX+ MPX2
IG+
GND C5
B5
J15
1E
1L
1JJ15
1E1C
1C
2D 2C3A 3E
3A 3E
O BR WW±L
O BRPP
P
R
R±L
R±L L±Y LG±B
DD 32
2413
3
11
31 1
1
8 6 20
1
52 8 5
4
13
6 6 16
151
2
10 Instrument Panel J/B
Engine Room J/BSub J/B No.3
AA
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1941
2135 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28470
Back Door ECUCombination Meter
I19
A/C ECU
(Integration Control and Panel)
Instrument Panel J/B
I18
Ignition SW
Engine Room J/B
Instrument Panel J/B
J8
J/C F10
Fusible
Link Block
Battery
IEC6 B11
BF1BD2
J34J33C5
C5
C6 1J
1C1D
1H
1J 1C
2C 2D
2C
1D 1F C6 Short Pin
ECU±B
AM2IGN1
IG2 AM2MPX1
MPX±LG±B LG±RLG±R
LG±R
LG±B
W±R
B±O W±R
B±R
W±R W±R
W±R
W±R
W±B
BR B
BABH 231
32
23
24 67
13
3
29
11
5 637
1 8
1
9
612
5 4J/C DI±1944
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2138 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1945
2139 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check combination meter.
CHECK:
Start the engine and check that the speed meter and tachometer operate normally.
HINT:
With this inspection, the combination meter CPU can be diagnosed if it works normally or not.
OK:
Speed meter and tachometer operate normally.
NG Go to combination system (See page DI±1610).
OK
2 Check wire harness and connector (Combination meter ± back door ECU, com-
bination meter ± integration control and panel).
PREPARATION:
Disconnect connector ºB11º of the back door ECU, connector ºC5º of the combination meter and connector
ºI19º of the integration control and panel.
CHECK:
Measure the resistance according to the values in the table below.
OK:
Tester connection (Symbols)ConditionSpecified condition
B11±2 (MPX1) ± C5±31AlwaysBelow 1 W
I19±13 (MPX±) ± C5±32AlwaysBelow 1 W
B11±2 (MPX1) ± Body groundAlways10 kW or higher
I19±13 (MPX±) ± Body groundAlways10 kW or higher
NG Repair or replace wire harness.
OK
Replace the combination meter.
If the problem recurs even after replacement, replace the body ECU.

I28471
Combination MeterMemory Seat ECU
& SW
Sub J/B No. 3J/C
J24
J/C
Instrument Panel J/B
F10
Fusible Link BlockI18
Ignition SW
Engine Room J/B
Battery
BHJ24
J/C J/C
J/C C5 J33 BI2 M6J34
J31 J32
3A 3AJ33 J34
J33 J34BI2
BI2 BI2
M6
M6 M7
AM1 ECU±IG
1F
1L
1J 1E 1G1C
1 4
6
1 16
2
1C
2 4
PWR SEAT
1 2
M7 BI2 ECU±B
Short Pin
2D 2C18 ALT
IG1 AM1 12
BB
W±B
W±B W±B
B58W W±L
W±R W±RB±Y B±R
L±O
3 W±R
W±RW±R W±R B±R B±R B±R L±O
L±O L±O L±O
3 111 8151641
5
A 9 C
A GG A
WWW17 30
CL
I FMPX1
+B
IG
SYSB
GND 1 4
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1947
2141 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28473
Combination Meter
F18
Front Passenger
Door ECUBack Door ECU
Sub J/B No. 3I18
Ignition SW Instrument Panel J/B
F10
Fusible Link Block
Engine Room J/BInstrument Panel J/B
Sub J/B No. 3
Battery
BJJ19
J/CJ22
J/C J37
J/CJ/C
J/C J33 J34
J33 J34 C5B11 BF1 BD2
II2B11
B11
B11 BF1 BD2
BD2 BF1 IN1
AM1 ECU±IG
1F
1L
1G1C
14
6
12
1C
154
12PWR No. 5 ALT
58
43C 3A88AAGAB H
IG1
AM1
1 26 7 312
1
6
4 2
5 11 1114 8
BB B B B
20 (*1)LG±R
B±RLG±R LG±R LG±R
B±RB±R B±R B±R
B±R B±Y
W±L W
B B
L±W L±W L±W L±W
W±R
W±R W±R
W±R W±R W±R
W±B W±B W±B W±B
A212
BB3 5
B11
B11 10 12 11 2
3A 3C
BD2 BF1
BF1 BD1IN1BF1 BD1 IC4
2 3 8 1
1J
1E 2C 2DECU±B
Short Pin
23
10MPX1
SIG
BDR
GND MPX2
BECU MPX1
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory 10 (*2)
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±1953
2147 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM