2001 TOYOTA SEQUOIA Service Repair Manual

Page 1961 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual ± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1759
1953 Author: Date:
2005 SEQUOIA   (RM1146U)
Illumination  circuit
CIRCUIT DESCRIPTION
The body ECU and the back door ECU detect the condition of each door

Page 1962 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual I28523
Back Door ECU
Sub J/B No. 3 ILE
B118
BF18
BD29
WWWW
J30J/C
J29 FMInstrument Panel J/BBody ECU
1G6
1G5
1M10
1E3
1G13
1G14
1E81M6
1J5ILE B73
1F 10
1M7W
3C
3A3A
3D6 6
16 6I17
Ignition Key
Cylinder

Page 1963 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual I28526
de fg
bc a
D12 Door Courtesy 
Light Rear LH
D9 Diode
(Interior Light No. 2)
2 11 2
W±B
R
BA1 7R±Y
R±Y
D16 Door Courtesy 
Light Switch Rear LH
1W±B (*1) (*2)O4 O53 9Overhead Module
Personal

Page 1964 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual DI±1762
± DIAGNOSTICSBODY CONTROL SYSTEM
1956 Author: Date:
2005 SEQUOIA   (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not usin

Page 1965 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual ± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1763
1957 Author: Date:
2005 SEQUOIA   (RM1146U)
3 Check wire harness and connector between each illumination light and body
ECU, each illumination light and ba

Page 1966 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual I24147
B7
HORN HORN Relay
2
1Body ECU
1
2D18
HR
HORN
B5 B±Y
6 C9
Horn SW
B54 F10 
FL Block H8
Horn (low)
1
1 B B8
2H
7
2F5
3W±R W±R19
IA1
26
Battery H7
Horn (high)Engine Room J/B
B DI±1764
± DIAG

Page 1967 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual ± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1765
1959 Author: Date:
2005 SEQUOIA   (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not usin

Page 1968 of 4323

TOYOTA SEQUOIA 2001  Service Repair Manual DI±1766
± DIAGNOSTICSBODY CONTROL SYSTEM
1960 Author: Date:
2005 SEQUOIA   (RM1146U)
4 Check horn relay (See page BE±145).
NG Replace horn relay.
OK
5 Check wire harness and connector between hor