Toyota Sequoia (2005). Manual — part 485
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DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1735
1929
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 theft deterrent horn 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, perform the ”ACTIVE TEST”.
BODY ECU:
Item
Test Details
Diagnostic Note
SECURITY HORN
Turn theft horn ON/OFF
This test is available only for vehicles equipped
with security horn.
OK:
The theft deterrent horn sounds or stops correctly when operating it through the hand–held tes-
ter.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
NG
2
Check theft deterrent horn (See page
NG
Replace theft deterrent horn.
OK
DI–1736
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1930
3
Check wire harness and connector between theft deterrent horn and body ECU,
theft deterrent horn 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
I24356
3
2
1J
1E
W–R
Body ECU
RDA
ECU–B
4
5
2D
5
4
B5
PRG
B
O
W–R
B5
5
IG
1
Battery
SHORT PIN
Engine Room J/B
1
2C
8
Sub J/B No. 3
3A
2
3A
1
RDA
PRG
W2
Wireless Door
Control Receiver
+B
E
V
R–G
3
2
W–R
Instrument Panel J/B
F10
Fusible
Link
Block
B
W–R
A
J43
J/C
O
A
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DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1737
1931
Wireless door lock receiver circuit
CIRCUIT DESCRIPTION
The signal from the transmitter is sent to the body ECU through RDA line of the wireless door control receiver.
RDA line is diagnosed by the body ECU, check DTC also in case of the failure of the wireless function.
WIRING DIAGRAM
DI6LV–13
DI–1738
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DIAGNOSTICS
BODY CONTROL SYSTEM
1932
INSPECTION PROCEDURE
1
Check that DTC B1242 is not indicated (See page
).
OK:
DTC B1242 is not indicated.
NG
Go to multiplex communication system
(See page
OK
2
Check wire harness and connector (PRG circuit).
PREPARATION:
Disconnect the connectors of the wireless door lock receiver and body ECU.
CHECK:
Check continuity between terminal W2–3 (PRG) of the wireless door lock receiver and terminal B5–5 (PRG)
of the body ECU.
OK:
Continuity
NG
Repair or replace wire harness or connector.
OK
3
Check voltage between terminals +B and E of wireless door lock receiver.
CHECK:
Measure the voltage between terminals W2–5 (+B) and W2–1 (E) of the wireless door lock receiver.
OK:
Voltage: 10 to 14 V
NG
Repair or replace harness or connector.
OK
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