2001 TOYOTA SEQUOIA wiring diagram

A23565
L5
Pump Module
Pressure Sensor
Vacuum Pump
Vent Valve
Engine Room R/B
BatteryJ/C
V4
Purge
VSVVC
PPMP
E2
MPMP
VPMP
PRG
MREL
EFI Relay
F10
FL Block
54
BBEFI No.1
2D1
53EFI No.2
2A 2 4
1
8
9 3
2
G±R AA J/C J2
G±RG±R
G±R G±R
IA44J/C J16
BBBJ/C
IG422
G±RW±G
E8 34
B±W
E68
B±WIA4
14
2H6
21 2F1
W±B
J/C J5 AJ48
J49 FLG±R BB12
G±R
G±R
BN15 P±L
BN1BN1 BN1 BN1 BN1
P±L 6
BB18
P±L P±L
J49
J48 B
H
E456
V±G
J48K
J49E
V±G
BB17
V±G V±G4 G±W3
G±W
BB24
G±W
IJ33
G±W
IG46
G±W
E8 2822
E4 E4 R±G
IJ34
R±G
BB22
R±G 2
R±GG±B1
G±B
BB23
G±B
IJ314
G±B
IG47
G±B
E823
BN1 8 W±B
W±B
BI
EDECM
± DIAGNOSTICSENGINE
DI±465
659 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

A23555
F10
Fusible
Link
Block9
+B
BatteryE1 1
8
1 E4
E6
BR 4D
B±R
67 I18 Ignition SW 2
W±R 1C 1E
1C2
13
BIG2
IA4
B±WECM
Engine Room J/B
EFI Relay
1DIGSW
MREL E4E4 17 IGN1
4E
Instrument Panel J/BSub J/B No. 4
5
AM2 Instrument Panel J/B
1
16 AM21J
2D
2F2C
2H 5
32
IA4J/C
5 4
B14 12 2
J16
A
EB EDD
J5
J/C W±B2H
2B±R
B±WB±R B±R EFI No. 1W±RB±O
B±O DI±494
± DIAGNOSTICSENGINE
688 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

A14809
B
BW
WB 2
EB2V2
VSV (ACIS)
2 1L±W21
E4ECM
ACIS
MREL 13
E3 P±B
B±R 1
1
1
1 1 1 1 1
12 EFI No. 2
EFI Main Relay
21
3
5
EFI No. 1
12
Engine Room No. 1 R/B
B±L
Battery B±W
W±B J3
J/C
AA
D
D
W±B
ECW
FL MAIN
1
1
4B
4A
FL BLOCK J7
J/C
W±B
1A DI±500
± DIAGNOSTICSENGINE
694 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

A19655A20059
STSW
ACCR
STAR
(NE)
Engine SpeedStarterPark/Neutral
Position SW
N P ST RelayACC Cut
Relay
Ignition
SW
ACC
ST2
ACCR
STSW
STAR BatteryECM
± DIAGNOSTICSENGINE
DI±503
697 Author: Date:
2005 SEQUOIA (RM1146U)
Cranking Hold Function Circuit
CIRCUIT DESCRIPTION
The starter is controlled by the ECM, when the ECM detects a start signal (STSW) from the ignition switch,
this system monitors the engine speed (NE) and continues to operate the starter until it has determined that
the engine has started (engine speed reaches approximately 500 rpm). If the engine is already running and
the ignition switch is turned to START, the ECM will not operate the starter.
WIRING DIAGRAM
Refer to DTC P0617 on page DI±298.
INSPECTION PROCEDURE
Hand±held tester:
1 Check operation of engine cranking.
CHECK:
When turning the ignition switch to the START position, check whether the starter motor starts.
OK:
Starter motor starts.
OK Check for intermittent problems (See page
DI±11).
NG
DID8M±01

± DIAGNOSTICSENGINE
DI±509
703 Author: Date:
2005 SEQUOIA (RM1146U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
Refer to DTC P0230 on page DI±179.
WIRING DIAGRAM
Refer to DTC P0230 on page DI±179.
INSPECTION PROCEDURE
1 Check fuel pump operation (See page SF±7).
OK Go to step 8.
NG
2 Connect hand±held tester, and check operation of fuel pump relay.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SPD.
CHECK:
Check the operation of the fuel pump relay when it is switched ON and OFF by the hand±held tester.
OK:
Operating noise can be heard from the relay.
OK Go to step 4.
NG
DID8L±01

A21044
Engine
Room
R/BR±B
7ECM
W
E4 11
C8
C10 12
B
R±L15 2
2
Battery7
6I18
Ignition
Switch
41D
1G 6
B±R R
GAUGE
Combination
Meter Malfunction
Indicator
Lamp AM2
IG2 AM2
DI±512
± DIAGNOSTICSENGINE
706 Author: Date:
2005 SEQUOIA (RM1146U)
MIL Circuit
CIRCUIT DESCRIPTION
If the ECM detects a trouble, the MIL lights up. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
DICFG±02

D14218
ECM
R
D
2 3 E78
STAR/NSW
11
E5
E521
E519
E510 J52
J52
J52
J52
J52
J52 J/C
J51
J51
J51
J51
J51
J51B
L±Y
B±Y
W±R
L
LG LGL W±RB±YL±Y
L±R
L±R
B±Y W±L
W BG±R* G±R P
PL
RL
NL
DL
2L
LL IG49
1D 1C
IPOGAUGE
IG1
AM1 74
8
7
1C
1L16AM1
2 1 ALT
BatteryF10
FL BlockCowl Side J/B LHI18
Ignition SW Cowl Side J/B RHTo 4WD Control ECU
To Translate ECU To Starter RelayP1
Park/Neutral Position SW
*: 4WD 21 N
8 54
5
6
1
9
7
3
8AEG GF HA H
C C
F
E
2
RB DI±578
± DIAGNOSTICSAUTOMATIC TRANSMISSION
772 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

D14157
O E1 Electronically Controlled
Transmission Solenoid
OT±O
OT+
L
OT2±L
OT2+ G±W
G±W
G±WG
B±L
G±W 2
110
9E7
E7
E828 32 24
THO2 THO1
E2ECM
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±585
779 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
AT FLUID TEMP 1
ATF Temp. Sensor Value/
min.: ±40C (±40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature when cold soak
HINT:
When DTC P0712 is output and hand±held tester output is 150C (302F) or more, there is a short circuit.
When DTC P0713 is output and hand±held tester output is ±40C (±40F), there is an open circuit.
Measure the resistance between terminal THO1 (OT) and body ground.
Temperature DisplayedMalfunction
±40°C (±40°F)Open circuit
150°C (302°F) or moreShort circuit
HINT:
If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.