Toyota Sequoia (2005). Manual — part 480
I24352
Body ECU
B5
KSW
IG
U1
Key Unlock Warning Switch
O
1
2
Y–G
13
A
A
J43
J/C
O
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1715
1909
Key unlock warning switch circuit
CIRCUIT DESCRIPTION
The key unlock warning switch turns on when the ignition key is inserted into the key cylinder and turns off
when the key is removed.
WIRING DIAGRAM
DI571–11
DI–1716
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1910
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 key unlock warning 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
KEY UNLK WRN SW
Key unlock warning switch/ON or
OFF
ON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
–
OK:
The indication on the tester switches between ON and OFF in accordance with the key unlock
warning switch status.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
NG
2
Check key unlock warning switch (See page
).
NG
Replace key unlock warning switch.
OK
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1717
1911
3
Check wire harness and connector between key unlock warning switch and
body ECU, key unlock warning 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
I28517
R–L
B2
Back Door Power Window Control Switch
UP
DOWN
B6
BDN
14
15
6
B6
BUP
3
5
W
P–L
B6
21
PWS
Body ECU
DI–1718
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1912
Back door power window switch circuit
CIRCUIT DESCRIPTION
The body ECU detects the condition of the back door power window switch and sends the related information
to the back door ECU via BEAN.
WIRING DIAGRAM
DI572–08
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