Page 149 of 1111
The window moves down during the up operation.2
With ignition switch ON, when performing the auto±up or manual ±up
operation, if the factor which increases the sliding resistance of window
glass near the inverse position is recognized.
Disassemble the door and replace or repair the
component.
Reset the limit switch.
If power window regulator and motor operate smoothly.
Ye s
No
Check or repair door glass run and window guide
frame.
Replace the driver door control ECU with the normal one
removed from another seat. Sliding resistance check:
Power window motor reset:
Check operation power window control is normal.
Remove power window regulator assembly.
When raising the assembled window glass by hand if the glass slides
smoothly without being caught.
Ye s Sliding resistance check:
Unit check:
Install power window regulator and reset the limit switch.
Power window motor reset:
Check operation power window control is normal.
Power window motor faulty.
Ye s
NoNormal.
(After checking the operation repeatedly, perform the
function check.)
No
Driver door control ECU faulty.Ye s
No
HINT: When difference of descending time comparing
to the opposite window is recognized, there seems to
be an error on sliding components (door glass run
and window regulator.)
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±115
2416 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FLOW CHART
Page 150 of 1111
BE0HE±10
I01363
Driver side Junction Block
Body ECU No.2
Ignition SwitchPower Window Switch
Power Window Master Switch
Power Window Motor
Power Window Motor
Power Window Switch Power Window Switch
Passenger side Junction Block
Body ECU No.1
BE±116
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2417 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
LOCATION
Page 153 of 1111
I04075
Driver Side ECU
From Back Side
1 9
10 18
8
17
Wire Harness Side
I04183
Driver Side ECU
From Back Side 7
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±119
2420 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
4. INSPECT ONE TOUCH POWER WINDOW SYSTEM/
CURRENT OF CIRCUIT (Using an ammeter)
(a) Disconnect the connector from the driver door ECU.
(b) Connect the positive (+) lead from the ammeter to termi-
nal 8 on the wire harness side connector and the negative
(±) lead to negative (±) terminal of the battery.
(c) Connect the positive (+) lead from the battery to terminal
17 on the wire harness side connector.
(d) As the window goes down, check that the current flow is
approximately 7 A.
(e) Check that the current increases up to approximately
14.5 A or more when the window stops going down.
HINT:
The PTC opens some 4 ± 90 seconds after the window stops
going down, so that check must be made before the PTC oper-
ates.
If the operation is as specified, replace the driver door ECU.
5. INSPECT ONE TOUCH POWER WINDOW SYSTEM/
CURRENT OF CIRCUIT (Using an ammeter with a cur-
rent±measuring probe)
(a) Remove the driver door ECU with connectors connected.
(b) Attach a current±measuring probe to terminal 7 of the
wire harness.
(c) Turn the ignition switch ON and set the power window
switch in the down position.
(d) As the window goes down, check that the current flow is
approximately 7 A.
(e) Check that the current increases up to approximately
14.5 A or more when the window stops going down.
HINT:
The PTC opens some 4 ± 90 seconds after the window stops
going down, so that check must be made before the PTC oper-
ates.
If operation is as specified, replace the driver door ECU.
Page 163 of 1111
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.
Page 164 of 1111
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
Page 174 of 1111
BE0GQ±03
I01365
Luggage Compartment
Courtesy 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 SwitchLuggage Compartment
Opener Switch
Luggage Compartment
Key Lock and Unlock
Switch
Horn Theft Deterrent HornEngine Room No.1 Junction Block
HORN Fuse
Headlight Control Relay
Starter Relay
Engine Hood Courtesy Switch
Driver Side Junction Block
ST Fuse
Taillight Control RelayEngine Room No.2 Relay Block
Horn Relay
BE±140
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2441 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
THEFT DETERRENT SYSTEM
LOCATION
The vehicle shown in this illustration is ºGS400º.
All components of ºGS300º other than the ones used for engine are same as ºGS400º.
Page 175 of 1111
DI3CO±10
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±141
2442 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PRE±CHECK
1. THEFT DETERRENT SYSTEM
When the system is set to the theft deterrent mode and any of
the following conditions are met, the system sounds the horns
and flashes the headlights and the taillights for approx. 1 min-
ute.
At the same time the system locks all doors (If all door are not
locked at once, the system repeats door locking operation ev-
ery 0.55 seconds during the one minute alarm time).
There are 2 modes in this system, which are active mode and
passive mode.
All initial setting are performed in active mode. It can be
switched to passive mode by specified operation. (See step 4.
CHANGING METHOD OF PASSIVE MODE)
Condition:
Any of the doors (Including the engine hood and luggage
compartment door) is unlocked or opened without the
key. *1
The battery terminal is disconnected and reconnected.
The system receives panic signal from remote keyless
entry. *2
*1: Only active arming mode.
*2: When the ignition key is not inserted in the key cylin-
der.
There are 4 conditions in this system which are disarming
condition, disarming preparation condition, arming condition
and alarming condition.
(a) Disarming condition:
(1) When a user is near the vehicle.
(2) When the alarming function does not operate.
(3) When theft deterrent function is not performed.
(b) Disarming preparation condition:
(1) Time from a user locks a door to be leaves the ve-
hicle.
(2) Time until transferring to disarming condition.
(3) Theft deterrent function is not performed.
(c) Arming condition:
(1) When a user leaves the vehicle completely.
(2) When theft deterrent function is possible.
Page 177 of 1111
Disarming condition
Any of the following conditions is met
When all doors and engine hood are closed, lock all the doors using a key.
When all doors and engine hood are closed, lock all the doors using wireless remote function.
When all doors and engine hood are closed, open and close either of doors and engine hood
then close and lock all doors and engine hood.
Disarming preparation condition
Any of the following conditions is met
30 seconds elapse when the engine hood
is closed and all doors are locked.
Any of the following conditions is met
Close and open either of all doors and
engine hood.
Lock and unlock either of doors.
Insert a key into the ignition key cylinder.
Reconnect the battery.
Arming condition
Any of the following conditions is met
Unlock the locked doors using the wireless
remote function.
Unlock the locked doors using the key.
Insert the key into the ignition key cylinder
and turn the ignition key ON.
Any of the following conditions is met
Either of closed doors opens.
Either of locked doors is unlocked by any
operation other than key or wireless remote
function.
The closed engine hood is opened.
The battery is reconnected.
Alarming condition
Any of the following conditions is met
Unlock the locked doors using the wireless
remote function.
Unlock the locked doors using the key.
Insert the key into the ignition key cylinder
and turn the ignition key ON.
In this mode, once theft is detected, it is
informed using light and sound to people
around the vehicle.
The alarming time described above passes.
(Key not inserted in ignition cylinder.)
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±143
2444 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. ACTIVE ARMING MODE
