Toyota Sequoia (2005). Manual — part 482
I24354
BH
W–B
W–B
W–B
P–B
W–B
BA1
Body ECU
4
3
2
D18
Door Unlock Detection SW
Rear LH
B7 LSWL
2
BC1
2
1
3 BC1
BK
B5 LSWR
3
BA1
P–L
D19
Door Unlock Detection SW
Rear RH
P–B
P–B
21
24
P–L
P–L
J/C
L
E
J30
J29
J/C
J45
J44
F
M
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1723
1917
Rear Door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions in this circuit.
WIRING DIAGRAM
DI574–10
DI–1724
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1918
INSPECTION PROCEDURE
1
Check rear door unlock detection switch (See page
NG
Replace door lock motor assembly.
OK
2
Check wire harness and connector between door unlock detection switch and
body ECU, door unlock detection switch and body ground (See page
NG
Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page
I18736
1
2
20
14
Body ECU
HCTY
B7
IA1
A
J1
J/C
L–W
E3
Engine Hood
Courtesy SW
W–B
EA
L–W
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1725
1919
Engine Hood Courtesy Switch Circuit
CIRCUIT DESCRIPTION
The engine hood courtesy switch is built into the engine hood lock assembly, and is turned on when the en-
gine hood is opened and goes off when the engine hood is closed.
WIRING DIAGRAM
DI7NV–08
I00298
1 (+)
2 (–)
DI–1726
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1920
INSPECTION PROCEDURE
HINT:
When using the hand–held tester, start the inspection from step 1 and when not using the hand–held tester,
start from step 2.
1
Check engine hood courtesy switch using hand–held tester.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON.
CHECK:
According to the display on the tester, read the ”DATA LIST”.
BODY ECU:
Item
Measurement Item/Display
(Range)
Normal Condition
Diagnostic Note
HOOD COURTSY SW
Hood courtesy switch/ON or OFF
ON: Engine hood OPEN
(Hood courtesy switch ON)
OFF: Engine hood CLOSE
(Hood courtesy switch OFF)
–
OK:
The indication on the tester switches between ON and OFF in accordance with the engine hood
courtesy switch status.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
NG
2
Check engine hood courtesy switch.
PREPARATION:
Disconnect the engine hood courtesy switch connector.
CHECK:
Check continuity between terminals 1 and 2 when the engine
hood lock is locked and unlocked.
OK:
Engine hood lock
condition
Tester connection
Specified condition
LOCK
1 – 2
No continuity
UNLOCK
1 – 2
Continuity
NG
Replace engine hood courtesy switch.
OK
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