2001 TOYOTA SEQUOIA wiring diagram

F19781
Translate ECU
O
J43
J/C
O A
A 8
5
BF10
Fusible
Link
Block ALTW±B 40
T5 GND
A
A J18
J/CW±B
W±B W±B
IL11
S1
32
S1 9
IL1GND1
GND2
Battery
IGIGABS & VSC Actuator
(Skid Control ECU)
VSC+
VSC±
IG1CANH
CANL
BZ
17 L
T5
11
T5
1
T56
S1
2
S1
22
S1 IL27
IL26
IL1 15 WL
W
B±R B±R
B±RW±L
W±L
B±R
B±R
W W±LB±Y
WV5
VSC Warning Buzzer
Buzzer J37A
J38A
J37A
3C8
3A8
1F4
1L1 1C4
6
1C I18
Ignition SW
12
AM1
IG1
AM1 ECU±IG Sub J/B No.3
Instrument Panel J/B21
1 2
O 7
J/C (*) CAN1 Circuit
(*)
(*)(*)
(*) DI±1052
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1246 Author: Date:
2005 SEQUOIA (RM1146U)
VSC Buzzer Circuit
CIRCUIT DESCRIPTION
The VSC buzzer sounds during VSC operation.
WIRING DIAGRAM
DI949±03

F19788
6
IL2
7 CANL
S12
VSC+ 6
TC 28Translate ECU
CANH11
VSC±
TC
CG
J43
J/CIG 4A55
4BP±B W
L ABS & VSC Actuator
(Skid Control ECU)
7
S1T5
T5
T5 W
L
IL2
P±B D6
Data Link Connector 3
O 13
4Sub J/B No. 4
O
AA (*) CAN1 Circuit
(*)
(*)
(*) (*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1055
1249 Author: Date:
2005 SEQUOIA (RM1146U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and CG of the DLC3 causes the skid control ECU to indicate the DTC by blinking
the ABS warning light, VSC TRAC warning light and BRAKE warning light.
WIRING DIAGRAM
DI94B±04

D6
DataLink
Connector
F19789
ABS & VSC Actuator
(Skid Control ECU)
R±L
T5 27
TS2440
S1
12
O
IG TS
CG
4R±LR±L
R±LTS
IL1 Translate ECU
3
O
AA J43
J/C4C 4B
4A6 66 Sub J/B No.4
(*) CAN1 Circuit (*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1057
1251 Author: Date:
2005 SEQUOIA (RM1146U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
In sensor check mode (test mode), a malfunction of the speed sensor that cannot be judged when the vehicle
is stopped is judged while driving.
Transition to sensor check mode (test mode) can be performed by connecting terminals Ts and CG of the
DLC3 and turning the ignition switch from OFF to ON.
WIRING DIAGRAM
DI94A±05

DIDI8±01
F19697
Translate ECU
Junction ConnectorECM
ENG+
ENG±14
T5
16
T51
J55
2
J55 R
W1
J53
2
J5333
E5
34
E5 W L CANH
CANL
Suspension Control ECU
CANH
CANL29
S25
28
S25G
W (*1)
(*1)1
J56
2
J561
J54
2
J54W B
6
14D6 DLC3
CANH
CANL
Instrument Panel J/B
BAT
CG W±R 13
1F 1
1L W W
8
5
B16
4 O
A
A
OJ43
J/C
IG ALT F10
FL Block
Battery
*1: w/ Air Suspension SystemOBD
12 DI±1076
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1270 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Check CAN Bus Line
CIRCUIT DESCRIPTION
When any DTC of the CAN communication system is output, first measure the resistance between the termi-
nals of the DLC3 and the suspension control ECU connector to specify the trouble area.
WIRING DIAGRAM

F19698
ECM
MREL 8
E4 B±W 14
IA4 B±W
B±R12
IA4B±R B±R
B±R J16
J/C
D
DD1
E4
2
E4+B
+B2 Engine Room J/B
EF1 Relay
2
2H
6
2H1
2D
1
2F 3
25
1B
W±B
W±B
W±B7
E8E01
EB
EDJ5
J/C A F10
FL Block
B
4
5 B
BatteryEF1 No.1
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1079
1273 Author: Date:
2005 SEQUOIA (RM1146U)
ECM Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
ECM Communica-
tion Stop Mode

ºENGINEº is not displayed on the ºBUS CHECKº screen
of the hand±held tester.

DTCs are output from each ECU in ECM communication
stop mode as shown in the ºDTC COMBINATION TABLEº
(see page DI±1067).

Power source or inside the ECM
WIRING DIAGRAM
DIDI9±01

F19699
Translate ECU
IG1 1
T5 B±R A
J37 J/B
A
J37 B±R Sub J/B No.3
8
3C 8
3A B±R
Instrument Panel J/B
ECU±IG
4
1C
6
1C 4
1F
1
1LAM1
2 1B±Y
2I18
Ignition SW
W±L
1
IG1AM1
W
8
5
BALTF10
FL Block
Battery40
T5 O
A
A
OJ43
J/C
IGGND
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1081
1275 Author: Date:
2005 SEQUOIA (RM1146U)
Translate ECU Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
Translate ECU
Communication
Stop Mode

ºTRANSLATE ECUº is not displayed on the ºBUS
CHECKº screen of the hand±held tester.

DTCs are output from each ECU in translate ECU com-
munication stop mode as shown in the ºDTC COMBINA-
TION TABLEº (see page DI±1067).

Power source or inside the translate ECU
WIRING DIAGRAM
DIDIA±01

F19706
Suspension
Control ECU
IG 10
S25 B±R
J37 J/C
J37 Sub J/B No.3
B±R 8
3C 8
3A B±R
Instrument Panel J/B
4
1F
1
1LECU±IG
AM14
1C
6
1CB±Y
2I18
Ignition SW
AM1
IG1W±L
W
8
ALT
5
B
BatteryF10
FL BlockGND 22
S25 W±B
A
J12
J/C
IF 121 AA
Translate ECU
ENG+
ENG±T5
T514
16ECM
CANH
CANL
Junction Connector
E5
E5 33
34 R
W
WL
J55
J55J53
J53 1
21
2 J56
J561
2
W G
CANH
CANL S25
S2529
28
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1083
1277 Author: Date:
2005 SEQUOIA (RM1146U)
Suspension Control ECU Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
Suspension Con-
trol ECU Commu-
nication Stop
Mode
ºRIAR AIRSUSº is not displayed on the ºBUS CHECKº
screen of the hand±held tester.

DTCs are output from each ECU in suspension control
ECU communication stop mode in the ºDTC COMBINA-
TION TABLEº (see page DI±1067).

Power source or inside the suspension control ECU

Suspension control ECU sub bus line
WIRING DIAGRAM
DIDIB±01

F19701
Translate ECU
ENG+
ENG±Junction Connector
14
T5
16
T5R
W1
J55
2
J551
J53
2
J53L
W33
E5
34
E5ECM
CANH
CANL
D6 DLC3
1
J54
2
J54B
W6
14CANH
CANL DI±1086
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1280 Author: Date:
2005 SEQUOIA (RM1146U)
Check CAN Main Bus Line For Disconnection
CIRCUIT DESCRIPTION
The CAN main bus line and DLC3 sub bus line may have a disconnection when the resistance between ter-
minals 6 (CANH) and 14 (CANL) of the DLC3 is more than 69 W.
SymptomTrouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of
the DLC3 is more than 69 W.

CAN main bus line

ECM

Translate ECU

DLC3 sub bus line
WIRING DIAGRAM
DIDIC±01