Lexus SC300 / Lexus SC400. Manual — part 188
NG
Check voltage between terminal 1 of lug-
gage compartment door opener motor and
body ground.
OK
NG
OK
Check luggage compartment door opener
motor.
Proceed to next circuit inspection
shown on matrix chart (See page
).
Check harness and connectors
between ECU and luggage
compartment door opener motor
(See page
Replace luggage compartment
door motor.
1
2
WIRING DIAGRAM
Luggage Compartment Door Opener Motor Circuit
CIRCUIT DESCRIPTION
This circuit unlocks the luggage compartment door when the ECU sends signals to the luggage
compartment door opener motor.
DIAGNOSTIC CHART
BE–382
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
OK
NG
OK
NG
INSPECTION PROCEDURE
1
Check voltage between terminal 1 of luggage compartment door opener motor and body
ground.
C
OK
P
1.
Remove luggage compartment trim rear cover.
2.
Disconnect the opener motor connector.
Measure voltage between terminal 1 of luggage
compartment door opener motor and body ground,
when opener switch is pulled and not pulled.
Check harness and connectors between ECU and lug-
gage compartmtne door opener motor (See page
).
2
Check luggage compartment door opener motor.
C
OK
Hint
Connect positive
lead to the opener motor connector
and negative
lead to the body of the opener motor.
Operated motor shaft and gear.
Perform inspection in a short time (within 1 second).
Replace luggage compartment door opener motor.
Proceed to next circuit inpsection shown on ma-
trix chart (Seepage
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
BE–383
Door Lock Control Switch Circuit
CIRCUIT DESCRIPTION
When the door lock control switch is pushed to the lock side, Lock terminal of the switch is grounded,
and when the switch is pushed to the unlock side, Unlock terminal is grounded (See wiring diagram
below).
WIRING DIAGRAM
NG
Check voltage between terminals 2 (3), 1(1)
of door lock control switch connector and
body ground.
OK
NG
OK
Check door lock control switch.
Check harness and connectors between ECU
and door lock control switch, switch and body
ground (See page
Replace door lock control switch.
1
2
Proceed to next circuit inspection
shown on matrix chart (See page
).
Check and replace ECU
Repair or replace harness or
connector.
3
OK
NG
DIAGNOSTIC CHART
BE–384
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
NG
OK
OK
NG
OK
NG
*1: malfunction of the ECU can be considered possible
only when the problem symptom is the following:
Lock and/or unlock using the Door Lock Con-
trol Switch cannot be done, neither on the driv-
er’s side nor on the passenger’s side.
INSPECTION PROCEDURE
1
Check voltage between terminals 2(3), 1(1) of door lock control switch connector and body
ground.
C
OK
Hint
P
Remove the door trim and service hole cover.
1.
Turn ignition switch ON.
2.
Measure voltage between terminals 2(3), 1(1) of
door lock control switch connector and body
ground, when door lock control switch is pressed to
the lock side, unlock side and not pressed.
The terminal number without brackets is for the LH, the
number with brackets is for the RH.
Proceed to next circuit inspection shown on matrix chart
(See page
2
Check door lock control switch.
C
OK
Hint
P
Disconnect the door lock control switch connector.
Check continuity between terminals 2(3), 1(1), and 8(2)
of door lock control switch connector, when door lock
control switch is pressed to the lock side, and unlock
side and not pressed.
The terminal number without brackets is for the LH, the
number with brackets is for the RH.
Replace door lock control switch.
3
Check harness and connectors between ECU and door lock control switch, switch and body
ground (See page
).
Repair or replace harness or connector.
Check and replace ECU. *1
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
BE–385
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