2000 LEXUS GS400 window
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BE02C±02
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±111
2412 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER WINDOW CONTROL SYSTEM
TROUBLESHOOTING
1. WINDOW DOES NOT OPERATE WITH POWER WINDOW MASTER SWITCH. (MANUAL OR AU-
TOMATIC OPERATION CAN NOT BE PERFORMED.)
TroubleSuspect Area (terminal No.)Parts name
All windows do not operate with master
switch of each window.
PWS terminal of body ECU does not output sig-
nal.
Body ECU PWS terminal (B8) output
Master Switch PW terminal (15) output
Check wire harness between PWS terminal
and PW terminal (15)
Body ECU
Master switch
Windows except driver's do not operate
with master switch of each window.
Master switch (window lock circuit) faulty
Check continuity between master switch PW
terminal (15) and W/L2 terminal (10)
Check wire harness between W/L2 terminal of
master switch (10) and PCT terminals of each
power window switch.
Master switch
Only specific window does not operate.
(Manual and automatic operation can not
be performed.)
FLOW CHART ±
Only specific window does not operate.
(Automatic operation can not be per-
formed.)When ºJam Protectionº sensor is defective, auto-
matic function as a fail±safe function might be
unable. Master switch
Power window switch
Door control ECU
Page 146 of 1111
Only specific window does not operate. (Neither manual nor automatic operation is available.)1
Diagnosis check:
Check output diagnosis trouble codes 21 ± 26 when operating the
master switch and power window switch.
(Refer to ºMultiplex Communication Systemº)If the door lock of the applicable seat operates.
Wire harness faulty or
D FR DOOR fuse faulty.
No Yes
Disconnect the driver door control ECU connector.
Ye sNo
Voltage check:
With ignition switch ON if 10 to 14 V power is
supplied to PCT (3) of power window switch.Wire harness faulty.
(Between master switch W/L2 terminal
(10) and power window switch PCT
terminal (3)
Continuity check:
Master switch faulty.
Check continuity master switch and power window switch.No (Driver side)
No (Except driver side)Ye s
No Ye s
Wire harness check:
Master switch
Master switch Driver door control ECU
AUTO (7)
DDN (18)
DUP (6)AUTO (B6)
MDN (B4)
MUP (B5)
Power window switch
Power window switch Driver door control ECU
A (5)
D (4)
U (6)AUTO (A22)
MDN (A23)
MUP (A24)
Wire harness faulty.
Continuity check:
Check continuity between UP terminal (A2) and
GND terminal (C12), DN terminal (A11) and
GND terminal (C12) of driver door control ECU .
Ye s
When replacing with the normal driver door control ECU
removed from another seat, if it operates normally.
Driver door control ECU faulty.No Yes
Driver door control ECU faulty.
No
Power window motor check:
Disconnect the motor connector.
Connect the battery positive (+) lead to terminal
UP (2) and negative (±) lead to terminal DN
(1) of wire harness side motor connector, check that
the motor operates.
Check power window motor.Ye s
No
Wire harness faulty.
Ye s
Power window motor faulty.
No
BE±112
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2413 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FLOW CHART
Page 147 of 1111
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±113
2414 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. REMOTE CONTROL OF ALL WINDOWS (EXCEPT DRIVER'S) DOES NOT FUNCTION WITH MAS-
TER SWITCH. (WINDOWS OPERATE NORMALLY WITH EACH OF MASTER SWITCHES.
TroubleSuspect Area (terminal No.)Parts name
All windows (except driver's) do not oper-
ate by remote control.
Fail±safe mode caused by leaving the master
switch ON or short circuit occurred in remote
control control switch of master switch.
Check continuity of master switch.
Master switch
Only passenger's door does not operate.
(UP, DOWN and AUTO DOWN do not op-
erate.)
Driver door control ECU DT1 terminal does not
output.
Driver door control ECU DT1 terminal (B3)
Master switch DT1 terminal (3)
Check wire harness between terminal DT1 (B3)
and DT1 (3)
Driver door control ECU
Master switch
Only passenger's door does not operate.
(Each operation does not operate.)Master switch faulty
Check continuity of master switch.
Only rear right side door does not operate.
(UP, DOWN and AUTO DOWN do not op-
erate.)
Driver door control ECU DT2 terminal does not
output.
Driver door control ECU DT2 terminal (B2)
Master switch DT2 terminal (11)
Check wire harness between terminal DT2 (B2)
and DT2 (11)
Driver door control ECU
Master switch
Only rear right side door does not operate.
(Either UP, DOWN or AUTO DOWN does
not operate.)Master switch faulty
Check continuity of master switch.
Only rear left side door does not operate.
(UP, DOWN and AUTO DOWN do not op-
erate.)
Driver door control ECU DT3 terminal does not
output.
Driver door control ECU DT3 terminal (B1)
Master switch DT3 terminal (14)
Check wire harness between terminal DT3 (B1)
and DT3 (14)
Driver door control ECU
Master switch
Only rear left side door does not operate.
(Either UP, DOWN or AUTO DOWN does
not operate.)Master switch faulty
Check continuity of master switch. Driver door control ECU
Master switch
Only UP operation does not operate.
(All window (Except driver side) doors.)
Master switch ON SC2 terminal does not output.
Driver door control ECU SC2 terminal does not
input.
Master switch SC2 terminal (12)
Driver door control ECU SC2 terminal (B10)
Check wire harness between terminal SC2 (12)
and SC2 (B10)
Driver door control ECU
Master switch
Only UP operation does not operate.
(Only specific window does not operate.)Master switch faulty
Check continuity of master switch.
Only DOWN operation does not operate.
(All window (Except driver side) doors.)
Master switch ON SC1 terminal does not output.
Driver door control ECU SC1 terminal does not
input.
Master switch SC1 terminal (4)
Driver door control ECU SC1 terminal (B9)
Check wire harness between terminal SC1 (4)
and SC1 (B9)
Driver door control ECU
Master switch
Only DOWN operation does not operate.
(Only specific window does not operate.)Master switch faulty
Check continuity of master switch.
Page 148 of 1111
BE±114
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2415 Author: Date:
2000 LEXUS GS300/GS400 (RM718U) Only AUTO DOWN operation does not
operate.
(All window (Except driver side) doors.)
Master switch ON SC3 terminal does not output.
Driver door control ECU SC3 terminal does not
input.
Master switch SC3 terminal (13)
Driver door control ECU SC3 terminal (B11)
Check wire harness between terminal SC3 (13)
and SC3 (B11)
Driver door control ECU
Master switch
Only AUTO DOWN operation does not
operate.
(Only specific window does not operate.)Master switch faulty
Check continuity of master switch.
3. THE KEY RELATED POWER WINDOW OPERATION DOES NOT OPERATE WITH DRIVER SIDE
DOOR KEY CYLINDER. (MASTER SWITCH OPERATION IS NORMAL.)
TroubleSuspect Area (terminal No.)Parts name
Door lock system does not operate with
door key.Refer to ºPOWER DOOR LOCK CONTROL
SYSTEMº.±
Door lock system does not operate with
door key.
Fail±safe mode caused by error on jam protec-
tion sensor of power window.
(Operation of power window with multi±function
transmitter is prohibited.)
HINT: DTC 31 ± 38 output
Refer to ºMultiplex Communication Systemº.
4. POWER WINDOW DOES NOT OPERATE WITH MULTI±FUNCTION TRANSMITTER. (WINDOWS
OPERATE NORMALLY WITH MASTER SWITCH.)
TroubleSuspect Area (terminal No.)Parts name
Door lock and luggage compartment
opener do not operate with multi±function
transmitter.Refer to ºWIRELESS DOOR LOCK CONTROL
SYSTEMº.±
Only luggage compartment opener oper-
ates with multi±function transmitter.Wireless door lock transmitter faulty.Check wireless door lock transmitter.
Door lock and luggage compartment
opener operate with multi±function trans-
mitter.
Fail±safe mode caused by error on jam protec-
tion sensor of power window.
(Operation of power window with multi±function
transmitter is prohibited.)
HINT: DTC 31 ± 38 output
Refer to ºMultiplex Communication Systemº.
5. WINDOW MOVES DOWN WITHOUT BEING ORDERED DURING THE UP OPERATION
TroubleSuspect Area (terminal No.)Parts name
After the window is fully closed, it starts to
move down.
Power window motor limit switch wire harness
faulty.
Power window motor reset switch is reset.
Driver door control ECU LMT terminal (B12)
Driver door control ECU
The window moves down during the up
operation.FLOW CHART ±
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 151 of 1111
BE0HF±04
I04116
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±117
2418 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT POWER WINDOW MASTER SWITCH CON-
TINUITY
Front driver's dwitch:
Switch positionTester connectionSpecified condition
AUTO7 ± 16Continuity
UP6 ± 16Continuity
OFF±No continuity
DOWN16 ± 18Continuity
Front passenger's switch:
Switch positionTester connectionSpecified condition
AUTO3 ± 13Continuity
UP3 ± 12Continuity
OFF±No continuity
DOWN3 ± 4Continuity
Rear left switch:
Switch positionTester connectionSpecified condition
AUTO13 ± 14Continuity
UP12 ± 14Continuity
OFF±No continuity
DOWN4 ± 14Continuity
Rear right switch:
Switch positionTester connectionSpecified condition
UP AUTO11 ± 13Continuity
UP11 ± 12Continuity
OFF±No continuity
DOWN4 ± 11Continuity
If continuity is not as specified, replace the master switch.
2. INSPECT POWER WINDOW MASTER SWITCH CIR-
CUIT
(See page DI±866)
Page 152 of 1111
I04117
15 16
2
Unlock
I04118
15 16
2
Lock BE±118
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2419 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSPECT POWER WINDOW MASTER SWITCH ILLU-
MINATION
(a) Set the window lock switch to the unlock position.
(b) Connect the positive (+) lead from the battery to terminal
15 and the negative (±) lead to terminal 16, and check that
all the illuminations light up.
(c) Connect the positive (+) lead from the voltmeter to termi-
nal 15 and negative (±) lead to terminal 2, and check that
the voltage meter needle indicates battery positive volt-
age.
(d) Set the window lock switch to the lock position, check that
all the passenger's power window switch illuminations go
out.
(e) Then, check that the voltage meter needle indicates no
voltage.
If operation is not as specified, replace the master switch.