Lexus GS300/400 (2000 year). Service manual — part 43

I04142

2

1

UNLOCK

I04275

2

1

LOCK

I04143

5

6

UNLOCK

I04276

5

6

LOCK

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

BE–135

2436

21.

Rear right side door:
INSPECT DOOR LOCK MOTOR CIRCUIT
(See page

DI–947

)

22.

Front left side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter)

(a)

Connect the negative (–) lead from the battery to terminal
2.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 1 and the negative (–) lead to battery negative (–) ter-
minal, and check that the current changes from approxi-
mately 3.2 A to less than 0.5 A within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 2 and the negative (–)
lead to terminal 1, and check that the door lock moves to
the LOCK position.

If operation is not as specified, replace the door lock assembly.

23.

Front right side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter)

(a)

Connect the negative (–) lead from the battery to terminal
6.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 5 and the negative (–) lead to battery negative (–) ter-
minal, and check that the current changes from approxi-
mately 3.2 A to less than 0.5 A within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 6 and the negative (–)
lead to terminal 5, and check that the door lock moves to
the LOCK position.

If operation is not as specified, replace the door lock assembly.

I05179

2

1

UNLOCK

I05180

2

1

LOCK

I05181

4

3

UNLOCK

I05182

4

3

LOCK

I04279

2

1

UNLOCK

BE–136

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

2437

24.

Rear left side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter)

(a)

Connect the negative (–) lead from the battery to terminal
2.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 1 and the negative (–) lead to battery negative (–) ter-
minal, and check that the current changes from approxi-
mately 3.2 A to less than 0.5 A within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 2 and the negative (–)
lead to terminal 1, and check that the door lock moves to
the LOCK position.

If operation is not as specified, replace the door lock assembly.

25.

Rear right side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter)

(a)

Connect the negative (–) lead from the battery to terminal
4.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 3 and the negative (–) lead to battery negative (–) ter-
minal, and check that the current changes from approxi-
mately 3.2 A to less than 0.5 A within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 4 and the negative (–)
lead to terminal 3, and check that the door lock moves to
the LOCK position.

If operation is not as specified, replace the door lock assembly.

26.

Front left side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter with a current–measuring probe)

(a)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2.

(b)

Attach a current–measuring probe to either the positive
(+) lead or the negative (–) lead, and check that the cur-
rent changes from approximately 3.2 A to less than 0.5 A
within 20 to 70 seconds.

I04275

2

1

LOCK

I04280

5

6

UNLOCK

I04276

5

6

LOCK

I05178

2

1

UNLOCK

I05175

2

1

LOCK

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

BE–137

2438

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, reverse the polarity, and
check that the door lock moves to the LOCK position.

If operation is not as specified, replace the door lock assembly.

27.

Front right side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter with a current–measuring probe)

(a)

Connect the positive (+) lead from the battery to terminal
5 and the negative (–) lead to terminal 6.

(b)

Attach a current–measuring probe to either the positive
(+) lead or the negative (–) lead, and check that the cur-
rent changes from approximately 3.2 A to less than 0.5 A
within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, reverse the polarity, and
check that the door lock moves to the LOCK position.

If operation is not as specified, replace the door lock assembly.

28.

Rear left side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter with a current–measuring probe)

(a)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2.

(b)

Attach a current–measuring probe to either the positive
(+) lead or the negative (–) lead, and check that the cur-
rent changes from approximately 3.2 A to less than 0.5 A
within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, reverse the polarity, and
check that the door lock moves to the LOCK position.

If operation is not as specified, replace the door lock assembly.

I05176

4

3

UNLOCK

I05177

4

3

LOCK

I04020

BE–138

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

2439

29.

Rear right side door:
INSPECT PTC THERMISTOR OPERATION (Using an
ammeter with a current–measuring probe)

(a)

Connect the positive (+) lead from the battery to terminal
3 and the negative (–) lead to terminal 4.

(b)

Attach a current–measuring probe to either the positive
(+) lead or the negative (–) lead, and check that the cur-
rent changes from approximately 3.2 A to less than 0.5 A
within 20 to 70 seconds.

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, reverse the polarity, and
check that the door lock moves to the LOCK position.

If operation is not as specified, replace the door lock assembly.

30.

INSPECT LUGGAGE COMPARTMENT DOOR OPEN-
ER MOTOR OPERATION

Connect positive (+) lead to the terminal 1 and negative (–) lead
to the opener motor body, and check that the motor operates.
31.

INSPECT LUGGAGE COMPARTMENT DOOR OPEN-
ER MOTOR CIRCUIT
(See page

DI–802

)