2001 TOYOTA SEQUOIA Page 18

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1711
1905 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check FOG LIGHT relay (See page BE±34).
NG Replace FOG LIGHT relay.
OK
2 Check fog light switch (See page BE±34).
NG Replace fog light switch.
OK
3 Check wire harness and connector between FOG LIGHT relay and fog light
switch, FOG LIGHT relay and battery, FOG LIGHT relay and body ground
(See page IN±35).
NG Repair or replace wire harness or connector.
OK
4 Check wire harness and connector between fog light switch and body ECU
(See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

DI±1714
± DIAGNOSTICSBODY CONTROL SYSTEM
1908 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check DRL No. 4 relay and DIMMER relay (See page BE±27).
NG Replace DRL No. 4 relay and DIMMER relay.
OK
2 Check wire harness and connector (Daytime running light circuit)
(See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

DI±1716
± DIAGNOSTICSBODY CONTROL SYSTEM
1910 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºDATA LISTº.
BODY ECU:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
KEY UNLK WRN SWKey unlock warning switch/ON or
OFFON: 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 DI±1686).
NG
2 Check key unlock warning switch (See page BE±24).
NG Replace key unlock warning switch.
OK

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1717
1911 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between key unlock warning switch and
body ECU, key unlock warning switch and body ground (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1719
1913 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check back door power window control switch (See page BE±75).
NG Replace back door power window control
switch.
OK
2 Check wire harness and connector between back door power window control
switch and body ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1721
1915 Author: Date:
2005 SEQUOIA (RM1146U)
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 door lock motor using hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
(a) According to the display on the tester, perform the ºACTIVE TESTº.
BODY ECU:
ItemTest DetailsDiagnostic Note
DOOR LOCKDoor lock LOCK/UNLOCKAll doors are closed.
OK:
All door lock motors lock or unlock the doors correctly when operating them through the hand±
held tester.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
NG
2 Check door lock motor (See page BE±79).
NG Replace door lock motor.
OK

DI±1722
± DIAGNOSTICSBODY CONTROL SYSTEM
1916 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between door lock motor and body ECU
(See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

DI±1724
± DIAGNOSTICSBODY CONTROL SYSTEM
1918 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check rear door unlock detection switch (See page BE±79).
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 IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).