Lexus SC300 / Lexus SC400. Manual - part 182

OK

NG

OK

NG

INSPECTION PROCEDURE

1

Check voltage between terminals B1 and E1 of power seat switch.

C

OK

P

Remove power seat switch with connector still con-
nected.

Measure voltage between terminals B1 and E1 of power
seat switch connector.

Voltage:

10 – 14 V

Check and repair harness and connectors between bat-
tery and power seat switch, power seat switch and body
ground.

2

Check power seat switch.

C

OK

P

Disconnect power seat switch connector.

Check continuity of each terminal shown below.

Switch Position

Terminal

Reclining

Neutral

Forward

Back

1

6

2

5

Continuity

Replace power seat switch.

Go to step [3].

–

BODY ELECTRICAL SYSTEM

Power Seat Control System (Passenger’s Seat)

BE–345

OK

NG

3

Check reclining motor.

C

OK

P

OK

C

(1) Remove seat.

(2) Disconnect reclining motor connector.

Connect battery 

 to terminal 1, and battery 



 to termi-

nal 2 of the reclining motor connector.

The seat back reclines.

Connect battery 



 to terminal 1, and battery 

 to termi-

nal 2 of the reclining motor connector.

The seat back returns to upright.

Replace reclining motor.

Check and repair harness connectors between
switch and motor.

BE–346

–

BODY ELECTRICAL SYSTEM

Power Seat Control System (Passenger’s Seat)

DOOR LOCK CONTROL SYSTEM

–

BODY ELECTRICAL SYSTEM

Door Lock Control System

BE–361

DESCRIPTION

The door lock control system has a key–interlocked door lock and unlock function and a key–confinement pre-
vention function. All doors can be locked and unlocked simultaneously by key operation at the front right or left
door (the key needs to be operated twice to unlock the doors at the driver’s door). If the door lock operation is
performed when one of the doors is open and the ignition key inserted in the key cylinder, doors are unlocked
automatically to prevent the ignition key from being left inside the vehicle. The luggage compartment door can
be opened by electromagnetic opener.
For the function of component parts of this system, refer to the circuit description in circuit inspection.

PARTS LOCATION

BE–362

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BODY ELECTRICAL SYSTEM

Door Lock Control System