2000 LEXUS GS400 door lock

I05185UNLOCK LOCK3 5 6 Front left side:
I05183
1 2 4
LOCK
UNLOCK Front right side
I04136
3 4 UNLOCK BE±132
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
2433 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. Front left side door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
LOCK3 ± 5Continuity
OFF±No continuity
UNLOCK3 ± 6Continuity
If continuity is not as specified, replace the switch.
7. Front left side door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH
CIRCUIT
(See page DI±872)
8. Front right side door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
LOCK2 ± 4Continuity
OFF±No continuity
UNLOCK1 ± 4Continuity
If continuity is not as specified, replace the switch.
9. Front right side door:
INSPECT DOOR KEY LOCK AND UNLOCK SWITCH
CIRCUIT
(See page DI±904)
10. Front door:
INSPECT DOOR UNLOCK DETECTION SWITCH CON-
TINUITY
Switch positionTester connectionSpecified condition
OFF (Door Lock set to
LOCK)±No continuity
ON (Door Lock set to
UNLOCK)3 ± 4Continuity
If continuity is not as specified, replace the switch.

I05184

3 412 UNLOCK
I04138
1 212
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE±133
2434 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
11. Front door:
INSPECT DOOR UNLOCK DETECTION SWITCH CIR-
CUIT
Driver side: (See page DI±870)
Passenger side (See page DI±902)
12. Rear door:
INSPECT DOOR UNLOCK DETECTION SWITCH CON-
TINUITY
Switch positionTester connectionSpecified condition
OFF (Door Lock set to
LOCK)±No continuity
ON (Door Lock set to
UNLOCK)3 ± 4 (Left side)
1 ± 2 (right side)Continuity
If continuity is not as specified, replace the switch.
13. Rear door:
INSPECT DOOR UNLOCK DETECTION SWITCH CIR-
CUIT
Rear LH side (See page DI±932)
Rear RH side (See page DI±949)
14. Front left side door:
INSPECT DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the door lock link moves to UNLOCK position.
(b) Reverse the polarity and check that the door lock link
moves to LOCK position.
If operation is not as specified, replace the door lock assembly.
15. Front left side door:
INSPECT DOOR LOCK MOTOR CIRCUIT
(See page DI±868)

I04139
65 56
I04140
1 221
I04141
43 34
BE±134
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
2435 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
16. Front right side door:
INSPECT DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
5 and the negative (±) lead to terminal 6, and check that
the door lock link moves to UNLOCK position.
(b) Reverse the polarity and check that the door lock link
moves to LOCK position.
If operation is not as specified, replace the door lock assembly.
17. Front right side door:
INSPECT DOOR LOCK MOTOR CIRCUIT
(See page DI±900)
18. Rear left side door:
INSPECT DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the door lock link moves to UNLOCK position.
(b) Reverse the polarity and check that the door lock link
moves to LOCK position.
If operation is not as specified, replace the door lock assembly.
19. Rear left side door:
INSPECT DOOR LOCK MOTOR CIRCUIT
(See page DI±930)
20. Rear right side door:
INSPECT DOOR LOCK MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and the negative (±) lead to terminal 4, and check that
the door lock link moves to UNLOCK position.
(b) Reverse the polarity and check that the door lock link
moves to LOCK position.
If operation is not as specified, replace the door lock assembly.

I04142
21
UNLOCK
I04275
21
LOCK
I04143
5 6
UNLOCK
I04276
5 6
LOCK
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE±135
2436 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
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
21
UNLOCK
I05180
21
LOCK
I05181
43
UNLOCK
I05182
43
LOCK
I04279
21
UNLOCK BE±136
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
2437 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
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
21
LOCK
I04280
5 6
UNLOCK
I04276
5 6
LOCK
I05178
21
UNLOCK
I05175
21
LOCK
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE±137
2438 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(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
43
UNLOCK
I05177
43
LOCK
I04020
BE±138
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
2439 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
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)

I04021
Push (OFF)
Push and
Turn (ON)
Pull (ON)
B 2
L 1
2B
1L
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE±139
2440 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
32. INSPECT LUGGAGE COMPARTMENT DOOR OPEN-
ER MAIN SWITCH CONTINUITY
Switch operationTester connectionSpecified condition
OFF (Push)±No continuity
ON (Push and turn)1 ± 2Continuity
If continuity is not as specified, replace the switch.
33. INSPECT LUGGAGE COMPARTMENT DOOR OPEN-
ER SWITCH CONTINUITY
Switch operationTester connectionSpecified condition
OFF2 ± BContinuity
ON (Pull)1 ± L
2 ± BContinuity
If continuity is not as specified, replace the switch.
34. INSPECT LUGGAGE COMPARTMENT DOOR OPEN-
ER SWITCH AND MAIN SWITCH CIRCUIT
(See page DI±816)