LEXUS GS400 2000 Service Repair Manual

I05121
1
2
3
5
I05122
13
67
I05123
13
67
I05124
13
67
I05125
13
67
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±127
2428 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Reverse the polarity and check that pulse is generated.
If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.
32. Front passenger's door:
INSPECT JAM PROTECTION PULSE SWITCH CIR-
CUIT
(See page DI±914)
33. Rear LH side door:
INSPECT JAM PROTECTION PULSE SWITCH
(a) Connect the positive (+) lead from the TOYOTA electrical
tester to terminal 3 and the negative (±) lead to terminal
5.
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (±) lead to terminal 1.
(c) Check that pulse is generated during the motor running.
(d) Reverse the polarity and check that pulse is generated.
If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.
34. Rear RH side door:
INSPECT JAM PROTECTION PULSE SWITCH
(a) Connect the positive (+) lead from the TOYOTA electrical
tester to terminal 3 and the negative (±) lead to terminal
5.
(b) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2.
(c) Check that pulse is generated during the motor running.
(d) Reverse the polarity and check that pulse is generated.
If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.

BE±128
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2429 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
35. CHECKING OF THE JAM PROTECTION FUNCTION
NOTICE:
Never, ever be caught any part of your body when check-
ing.
HINT:
In case of performing resetting of the limit switch, do checking
after repeating up and down of the glass with automatic opera-
tion.
(a) Confirmation of AUTO up operation:
Confirm that the window will be fully close with AUTO up
operation.
(b) Checking of the operation of the jam protection function:
(1) Move up the window with AUTO up operation and
check that the window will go down when it touches
the handle of the hammer stetted.
(2) Confirm that the window will then stop going down
about 200 mm.
HINT:
In case of removing the glass, glass guide, regulator and etc.
be sure to perform checking of the jam protection function.
If the jam protection is not function properly, adjust power win-
dow motor reset switch and pulse switch.

BE0HG±04
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±129
2430 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ADJUSTMENT
HOW TO RESET POWER WINDOW MOTOR (RESET SWITCH AND PULSE SWITCH)
If the jam protection is not functioned properly, perform the following procedure.
HINT:
It is necessary to reset the power window motor (in initial position for the limit switch) when separating the
window regulator from the power window motor or operating the window regulator with the door glass not
installed.
(a) Remove the power window motor. (See page BO±12, BO±18)
HINT:
Place the matchmarks on the power window motor and window regulator gear.
(b) Connect the power window motor and power window switch to wire harness of the vehicle.
(c) Turn the ignition switch ON and operate the power window switch to idle the power window motor in
UP side direction for more than 6 rotations or less than 10 rotates (4 seconds or more).
(d) Assemble the power window motor and regulator.
HINT:

Install the motor when the regulator arm is below the middle point.

Align the matchmarks on the power window motor and window regulator gear when install the power
window motor.
(e) Assemble the power window regulator and door glass.
HINT:
Never rotate the motor to the down direction until the completion of the window glass installation.
(f) Connect power window switch to wire harness and turn the ignition switch ON.
(g) Repeat UP and DOWN operation several times manually.
(h) Check if AUTO UP " AUTO DOWN operates in automatic operation.
HINT:

Take care that the jam protection function does not operate just after resetting.

Reset the regulator again when performing the reverse operating after closing the window fully by
AUTO UP operation.
(i) Check the power window function.

BE0HQ±11
I01364
Power Window Master Switch
Door Lock Manual SwitchIgnition Switch
Door Lock Assembly
 Door Lock Motor
 Door Unlock Detection
Switch
 Door Key Lock and
Unlock Switch
Door Lock Assembly
 Door Lock Motor
 Door Unlock Detection Switch
 Door Key Lock and Unlock Switch
Passenger Door Lock
Control Switch
BE±130
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
2431 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER DOOR LOCK CONTROL SYSTEM
LOCATION

BE0HR±04
I04116
I04132
I04133
42
± BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE±131
2432 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. Master switch:
INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
LOCK5 ± 16Continuity
OFF±No continuity
UNLOCK16 ± 17Continuity
If continuity is not as specified, replace the switch.
2. Master switch:
INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH
CIRCUIT
(See page DI±866)
3. INSPECT PASSENGER'S DOOR LOCK CONTROL
SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
LOCK2 ± 3Continuity
OFF±No continuity
UNLOCK1 ± 2Continuity
If continuity is not as specified, replace the switch.
4. INSPECT PASSENGER'S DOOR LOCK CONTROL
SWITCH CIRCUIT
(See page DI±898)
5. INSPECT PASSENGER'S DOOR LOCK CONTROL
SWITCH ILLUMINATION
Connect the positive (+) lead from the battery to terminal 4 and
the negative (±) lead to terminal 2, and check that the indicator
light lights up.
If operation is not as specified, replace the switch.

I05185UNLOCK LOCK3 5 6 Front left side:
I05183
1 2 4
LOCK
UNLOCK Front right side
I04136
3 4 UNLOCK<Example Front left side> 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
<Example Rear left side>
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.