engine TOYOTA SEQUOIA 2001 Service Repair Manual

H23999
Occupant
Classification ECU
O6 +B1
BL11
W±R
J49
O6IG 7
O6GND 3 W±R C J/C
I
J48 W±R 2
3D 1
3ASub J/B No. 3
W±R
W±R
W±R
W±B
W±B
BL16 BL12
B±O B±O
J45B J/C
I
J44 B±O 2
4C 2
4DSub J/B No. 4
B±O
Instrument Panel J/B
17
1E 2
1CIGN1
3
1C
2
1E3
1J7
1J I18
Ignition SW
IG2B±R
AM26
5
W±RW±R
Engine Room J/B
8
2C
1
2DECU±B Short Pin
1
2C AM2 F10
FL Block
54B
B
Battery
BK
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1343
1537 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H24000
Airbag Sensor
Assembly
IG2 A20 B
Engine Room J/B Instrument Panel J/B
Instrument Panel J/B I18
Ignition SW
21
1A3
1J7 1C2
1C3 AM2 IG2B±R
6 5IGN1
AM2
2C1
2D1 W±R W±R
B
4
5
BF10
Fusible Link
BlockE1
E2 A2025
A2026 W±B
W±B 1A6
1F9
1F 10
1A8 W±B
W±B A
A J8
J/C
IE Battery
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1481
1675 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H23996
LA
A2014
ABR I18
Ignition SW
Combination Meter
BatteryIG2 A2021
E1 A2025
E2 A2026 B
W±B
W±B B±R
IG2 AM26 5 W±R
SRS B±Y
C5 29
C612 C6241D4
1A5 1A3
IGN1
1D6
1F9
101A6
1A8 Instrument Panel J/B
Engine Room J/B1H11
1J7
2C1
2D1AM2BR
W±B
W±B
J8
J/C A
A 4
5 B
BB±O
IEAirbag Sensor
Assembly
1C2
Instrument Panel J/B
F10
Fusible Link Block 1C3 D6
DLC3
114B10
4A20
4A10B±Y
B±Y
1F W±R Sub J/B No. 4 DI±1492
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1686 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

I28446
B±R
W±B W±RW±L
W±B W±RW±RW±R
W±R B±R
B±R B±R
W±R L±O L±O L±O
L±O
B±Y B±R
L±O
1 2
34 5
68
5
4A
B CF
I
W
B A
A A
BB
W±B 8 11
3L CG
1C
1E 1F
1G
1J
2C 2D3A 3C
1L
1C 3A 3A
4
164
12 219
15 16 88Sub J/B No. 3J/C
J/CJ24 J/C
J/C
111Sub J/B No. 3J31 J32
J37 J38 J33 J34
J33 J34
J24 J/C Instrument Panel J/B
I18
Ignition SW
Engine Room J/B F10
FL Block
ALT
8BI2 M7
M6
M6 BI2
BI2Position Control
ECU & Switch
+B
IG
SYSB
GND 1
2
BI2
Battery
BHAM1 AM1 PWR SEATECU±IG
IG1
M7 ECU±B Short Pin
± DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI±1515
1709 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DIDF0±01
A04550
TC CG
1 2345678
9
10 11 12 1314 15 16
I11929
CRUISE Main
Indicator Light
I28693
Normal System Code:
ON
OFF
Code 52
Code 21 0.25 sec.
0.25 sec.
ON
OFFDiagnostic Trouble Code:
4.5 sec. 2.5 sec. 1.5 sec. 0.5 sec.
0.5 sec.
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1545
1739 Author: Date:
2005 SEQUOIA (RM1146U)
DTC CHECK / CLEAR
1. DTC CHECK (USING SST CHECK WIRE)
(a) Using SST check wire, connect terminals TC and CG
of
the DLC3.
SST 09843±18040
(b) Turn the ignition switch to the ON position.
(c) Read and record DTCs from the CRUISE main indicator
light on the combination meter. As examples, refer to the
chart below for the blinking patterns of the normal system
code, and diagnostic trouble codes 21 and 52.
(d) Refer to the Diagnostic Trouble Code Chart (see page
DI±1549) for DTC information.
2. DTC CLEAR (USING SST CHECK WIRE)
Remove the EFI No.1 and ETCS fuses from the engine room
J/B for more than 60 seconds, or disconnect the battery termi-
nal for more than 60 seconds.

I24840
Battery 117
1E
AM2
1 2W±RI18
Ignition SW
B±R
IG2
85E4ECM
ST1± 1
STOP16
5 S14
Stop Light SW
7G±Y
3
6E4STP
1C B±O
3
F10 FL Block
ALT IGN1
B B
W
1F 1L1
2D 2C15
W±RAM2
ST2
1C2
1J 2
4A2 B±OW4
2G±Y
Instrument Panel J/B
Sub J/B No. 4
Engine Room J/B
Instrument Panel J/B4L±B Sub J/B No. 4
4D1
1
4A4E DI±1552
± DIAGNOSTICSCRUISE CONTROL SYSTEM
1746 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0571/52 Stop light switch circuit malfunction
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch assy sends a signal to the ECM. When the ECM
receives this signal, it cancels the cruise control.
Fail±safe function operates to enable normal driving even if there is a malfunction in the stop light signal
circuit.
The cancel condition occurs when positive battery voltage is applied to terminal STP.
When the brake is applied, battery positive voltage is normally applied to terminal STP of the ECM through
the STOP fuse and the stop light switch assy, and the ECM turns the cruise control off.
DTC No.DTC Detection ConditionTrouble Area
P0571/52Stop light switch does not turn off even once the vehicle is
driven
Stop light switch assy

Stop light switch assy circuit

ECM
WIRING DIAGRAM
DIAB6±05

I28462
Combination Meter
Instrument Panel J/B
I18
Ignition SWEngine Room J/BPIECM
B±O LG±R
Cruise
W±R
Battery
IG2 B±R24
32
1H 1C
AM2
62
1 IGN1
1C6
7C5 E518
1C 1J
2C2D
W±R
5
AM2B 11
B54F10
FLB
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±1557
1751 Author: Date:
2005 SEQUOIA (RM1146U)
CRUISE main indicator light circuit
CIRCUIT DESCRIPTION
The CRUISE main indicator light comes on while the cruise control system is in operation and blinks when
there are any problems with the system.
DTCs can be read by counting the number of times the CRUISE main indicator light blinks.
WIRING DIAGRAM
DIDF3±01

DID65±01
DI±1570
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1764 Author: Date:
2005 SEQUOIA (RM1146U)
ENGINE IMMOBILISER SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DI1AJ±49
Vehicle Brought to Workshop
Customer Problem Analysis
Check and Clear DTCItems inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation Symptom
does not occur
Symptom
occurs
DTC Check
Circuit Inspection and Part Inspection
DTC ChartProblem Symptoms Table
Identification of Problem
Repair
Confirmation Test
End
1
2
3
4
6
77
8
9
10
P. DI±1572
P. DI±1576
P. IN±24
P. DI±1573 P. DI±1576
P. DI±1578
P. DI±1580 ± DI±1599
Multiplex Communication System Inspection * 5
P. DI±1904
*: Confirm that there is no trouble by DTC check.
Normal system code
Trouble code
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
DI±1571
1765 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
The ECU of this system is connected to the multiplex communication system. Therefore, before starting trou-
bleshooting, make sure to check that there is no trouble in the multiplex communication system.
Troubleshoot in accordance with the following procedures:

DI1AK±28
ENGINE IMMOBILISER Check SheetInspector 's
Name:
Customer 's Name
Date Vehicle
Brought InLicence Plate No. VIN
Production Date
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
DTC Check1st Time
2nd TimeNormal System Code
Trouble Code (Code )
Normal SystemCodeTrouble Code (Code )
Symptomskm
miles
Engine does not start.
Check ItemMalfunction
Indicator LampNormal
Remains ON Does not Light Up
Immobiliser is not set.
(Engine starts with key codes other than the registered key code.)
Security indicator is always ON.
Security indicator is always ON. (Although code has been registered in the
automatic registration mode, indicator is not OFF.)
Security indicator is OFF.
(When DTC of immobiliser is output)
Security indicator is OFF.
(When DTC of immobiliser is not output)
Security indicator is abnormally blinking.
No code is output. DI±1572
± DIAGNOSTICSENGINE IMMOBILISER SYSTEM
1766 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK