2001 TOYOTA SEQUOIA wiring diagram

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1025
1219 Author: Date:
2005 SEQUOIA (RM1146U)
ABS Warning Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1021.
WIRING DIAGRAM
See page DI±1021.
INSPECTION PROCEDURE
1 Check operation of the ABS warning light.
When using the hand±held tester:
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand±held.
CHECK:
Check that ºONº and ºOFFº of the ABS warning light can be shown on the combination meter with the hand±
held tester.
ItemVehicle Condition/Test DetailsDiagnostic Note
ABS WARN LIGHTTurn ABS warning light ON/OFFObserve combination meter
OK:
ABS warning light operates.
When not using the hand±held tester:
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the connector from the skid control ECU.
(c) Turn the ignition switch to the ON position.
CHECK:
Check the ABS warning light comes on.
OK:
ABS warning light comes on.
NG Go to step 2.
OK
Check and replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
DIDML±01

F19778
ABS & VSC Actuator
(Skid Control ECU)
VSCW 44
S1 P±L IL2 3 P±L
3 C6
Combination SW Instrument Panel J/B
11
1HB±O
24
2 1CIGN1
B±R
I18
Ignition SW
IG2 AM2
IG1
AM13
1C
6
1C
4
1C7
1J
1
1L
4
1F AM1
ECU±IG1 2
265
1W±R
W±L
B±YW±R
WBB 1
2C1
2D
B±RSub J/B No.3
8
3A8
3CB±R
B±R
B±R B±R
W±B A
J37
A
J38 A
J371
IL113
S1
IG1 IG1
GND1
40O
O A
AA
AW±B
W±B W±B
J18
J/C J43
J/C17
IL1
9
IL11
S1 GND1
GND2 32
S1
IG
IG W
B
B 5 8
4
ALTF10
Fusible
Link
Block
BatteryEngine Room J/B
AM2
J/C T5
Translate ECUVSC TRAC
7
11L
WB±R
L
W 7
IL26
S1
6
IL22
S1CANH
CANL VSC+
VSC±
(*) CAN1 Circuit (*) (*)
(*)
(*) DI±1028
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1222 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1031
1225 Author: Date:
2005 SEQUOIA (RM1146U)
VSC TRAC Warning Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1027.
WIRING DIAGRAM
See page DI±1027.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Check operation of the VSC warning light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the hand±held tester main switch ON.
(c) Select ACTIVE TEST mode on the hand±held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC TRAC warning light can be shown on the combination meter with
the hand±held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
VSC / TRC OFF INDTurns VSC / TRAC OFF indicator ON / OFFObserve combination me-
ter
OK:
VSC TRAC warning light operates.
NG Go to step 2.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
DIDMM±01

F19769
Translate ECU
VSC+
VSC±
IG17
T5
T511
1
T5B±RL
W
AA
J37
J38
A
J37B±R J/C
B±R B±RL
W 7
IL2
6
IL2
1
IL16
S1
2
S1
13
S1 ABS &VSC Actuator
(Skid Control ECU)
CANH
CANL
IG1
8
3C8
3A
B±R Instrument Panel J/B
4
1C
2
1C
3
1C
6
1C4
1F
11
1H
7
1J
1
1L ECU±IG
IGN1
AM1 B±R B±Y
W±R
W±LB±O
W±R
W
1 2Combination Meter
24
C6
Brake
1C5 W
8
ALTF10 Fusible
Link BlockEngine Room J/B
A W±R 1
2D1
2C
4
5
R±B R±B
B1 Brake Fluid Level
Warning SW
Y±L Y±LW±B 23
IA1
129
IA5O
A
A O
OJ43
J/C
IG Sub J/B No.4
LG±R
LG±R 4
4B4
4D
1P2 Parking
Brake SW
B
Battery 39
T5
24
T5
40
T5
4
T5 BRL
LVL2
GND
PKB2Sub J/B No.3
I18
Ignition SW
AM1 IG1
AM2 IG2 1
5 W±L
2
6
AM2
BB±R (*) CAN1 Circuit
(*)
(*)
(*) (*) DI±1034
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1228 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1038
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1232 Author: Date:
2005 SEQUOIA (RM1146U)
BRAKE Warning Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1033.
WIRING DIAGRAM
See page DI±1033.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Check operation of the BRAKE warning light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand±held.
CHECK:
Check that ºONº and ºOFFº of the BRAKE warning light can be shown on the combination meter with the
hand±held tester.
ItemVehicle Condition/Test DetailsDiagnostic Note
BRAKE WARN LIGHTTurn BRAKE warning light ON/OFFObserve combination meter
OK:
BRAKE warning light operates.
NG Go to step 3.
OK
DIDMO±01

F19779
ABS & VSC Actuator
(Skid Control ECU)
IG1 13
S1 B±R 1
IL1
B±R B±R
B±R
B±R
B±R A
J38 A
J37
A
J37 1
T5 IG1 Translate ECU
8
3C8
3A J/C
4
1F
11
1H
7
1J
1
1L 4
1C
2
1C
3
1C
6
1CECU±IG
IGN1
AM1
1 2 Instrument Panel J/B
B±O
W±R
W B±Y
B±R
W±R W±L
W±LIG1
IG2 AM1
AM2 I18
Ignition SW
W
W±R
WBEngine Room J/B
1
2C 1
2DAM2
Combination Meter
1C6
24
SLIP W±R
W±R
O
J43
J/C
O A
A W
8
4B
5
B
BatteryF10
Fusible
Link
Block ALT
IG
IGW±B 37
T5
40
T5 IND
GND
A
A J18
J/CW±B W±BW±B 17
IL11
S1
32
S1 9
IL1GND1
GND2 2
6 1
5Sub J/B No.3
OB±O 7
IL2
6
IL2 11
T57
T5
2
S16
S1 VSC+
VSC±L
WL
WCANH
CANL (*) CAN1 Circuit
(*) (*) (*)
(*) DI±1042
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1236 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1045
1239 Author: Date:
2005 SEQUOIA (RM1146U)
SLIP Indicator Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1041.
WIRING DIAGRAM
See page DI±1041.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 3 when not using the
hand±held tester.
1 Check operation of the SLIP indicator light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the hand±held tester main switch ON.
(c) Select ACTIVE TEST mode on the hand±held tester.
CHECK:
Check that ºONº and ºOFFº of the SLIP indicator light can be shown on the combination meter with the hand±
held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
SLIP INDI LIGHTTurns SLIP indicator light ON / OFFObserve combination me-
ter
OK:
SLIP indicator operates.
NG Go to step 3.
OK
DIDMP±01

F19780
ABS & VSC Actuator
(Skid Control ECU)
Translate ECU
CANH
CANL
IG1 VSC± VSC+
IG17
T5
11
T5
1
T56
S1
2
S1
13
S1 7
IL2
6
IL2
1
IL2 A
J38
A
J37 A
J37
8
3C8
3A L
W
B±RL
W
B±R
B±R
B±R B±R
B±R Instrument Panel J/B
4
1C
2
1C
3
1C
6
1C4
11
1H
7
1J
1
1L 1F ECU±IG
IGN1
AM1
21 AM1
AM2IG1
IG2 I18
Ignition SW
B±Y
B±R W±L
W±R
W±LB±O
W±R
W 12
56C6
Combination
Meter
VSC OFF
(4WD)
TRAC OFF
(2WD)
24
2
R±G W±R W
Engine Room J/B
1
2D1
2C AM2 F10 Fusible
Link Block
B 8
54 ALT
R±G 38
T5
26
T5
31
T5
40
T5 WT
CSW
EXI2
GND
(4WD)
Y±G
(4WD)
L±W
Y±B L±WSub J/B No.4
8
4B
7
4B7
4A8
4A16
F23
4
F23DL
PI
B
BatteryA
AJ43
J/C
IGJ18
J/C
IG A
A W±B W±B
O
OW±B
W±B 17
IL1
9
IL132
S11
S1GND1
GND2 Sub J/B No.3
4WD Control ECU J/C (*) CAN1 Circuit
(*)
(*)(*) (*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1049
1243 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM