reset LEXUS GS400 2000 Service Repair Manual

BE±2
± BODY ELECTRICALBODY ELECTRICAL SYSTEM
2303 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
4. MICRO COMPUTER PRESET DRIVING POSITION SYSTEM
Power Seat Control System
Power Mirror Control System
Power Tilt and Telescopic Steering System
If the battery negative (±) terminal is disconnected, the preset driving positions stored in memory are erased,
so be sure to note the positions and reset them after the battery terminal is reconnected.
5. AUDIO SYSTEM

If the negative (±) terminal cable is disconnected from the battery, the preset AM, FM 1 and FM 2 sta-
tions stored in memory are erased, so be sure to note the stations and reset them after the negative
(±) terminal cable is reconnected to the battery.

If the negative (±) terminal cable is disconnected from the battery, the ºANTI±THEFT SYSTEMº will
operate when the cable is reconnected, but the radio, tape player and CD player will not operate. Be
sure to input the correct ID number so that the radio, tape player and CD player can be operated again.
6. MOBILE COMMUNICATION SYSTEM
If the vehicle is equipped with a mobile communication system, refer to precautions in the IN section.

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 <B>±

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 <B>

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.

I07735
± BODY ELECTRICALAUDIO SYSTEM
BE±191
2492 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. DIAGNOSIS FUNCTION (PIONEER made)
Error codes over tuner and connected equipment are displayed on the screen of tuner.
(a) Diagnosis start±up
For shifting to diagnosis mode, push ºCDº switch 3 times with pressing º1º and º6º of PRESET switch
at the same time while the audio power is OFF and ACC is ON.
To exit from diagnosis mode, press ºCDº switch for 2 seconds or turn the ignition key OFF.
(When º1±190º is displayed, the mode is transferred to LAN check mode.)
(b) LAN check
When starting up the diagnosis mode, the mode turns to LAN check mode, the screen displays the
code numbers (physical address) of tuner and connected equipment. Smaller codes are displayed in
order, displayed code numbers are switched by operating TUNE ºUPº or ºDOWNº switch. In LAN check
mode, by pressing º5º of PRESET switch for more than 2 secs., diagnosis memory of each equipment
can be deleted, when deletion is completed, the mode returns to LAN check mode.
Code No. (physical address) List
Code No. (physical address)Equipment name
190Radio receiver assembly (Audio head unit)
240CD changer (in Luggage room)
360CD changer (in center console and glove compartment box)
440Power amplifier
(c) System check
When pressing º1º of PRESET switch in LAN check mode, the mode turns to the system check
mode, the system performs self diagnosis of connected equipment and displays the re-
sults.(ºSYSº (showing the system is under detection) is displayed.)
Perform the operation shown in the following illustration, then read the result of the inspection.

H: This shows the equipment has a diagnosis code.
190: Physical address
1: This is the number allotted to the diagnosis code
that occurred.
21: DTC No.
Last Code No.: NO DTC No.
Pressing TURN ºDOWNº
Pressing TURN ºUPº
.
.
..
.
.1: This is the number allotted to the diagnosis code
that occurred. BE±192
± BODY ELECTRICALAUDIO SYSTEM
2493 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HINT:
It sometimes takes approx. 40 secs. till the system inspection is completed.
The chart below is an example of when diagnosis code º21º appears on the physical address (190)
equipment. (ROM error occurs on the radio receiver.)
The smaller code numbers (physical address) are displayed in order (code No., diagnosis code, sup-
port code of diagnosis code (object equipment)).
When no error is detected in the system, º00º is displayed.
When an error code is detected, up to 6 codes per one system are displayed. Pressing TUNE ºUPº
or ºDOWNº switches the display.
In the system check mode, when pressing º6º of PRESET switch the mode returns to LAN check mode.
(d) Diagnosis memory
(1) In LAN check mode, when pressing º2º of PRESET switch the mode turns to the diagnosis
memory mode. (ºCODEº is displayed.)
The results of self diagnosis performed over tuner and connected equipment are memorized and
displayed.
(2) Perform the operation shown in the following illustration, then read the result of the inspection.
HINT:
The smaller code numbers (physical address) are displayed in order (code No. , periodic communica-
tion number when error occurs, diagnosis code, and support code of diagnosis code (object equip-
ment)).
When no error is detected in the system, º00º is displayed. When an error code is detected, up to 6
codes per one system are displayed. Pressing TUNE ºUPº or ºDOWNº switches the display. Each diag-
nosis code is same as code in the system check mode.
When pressing º6º of PRESET switch, the mode returns to LAN check mode.
The following illustration below is an example of when diagnosis code ºD1º appears on the code (190)
and (240 or 360) equipment. (Communication error occurs between the radio receiver and CD chang-
er.)

H: This shows the equipment has a diagnosis code.
190: Physical address
1: This is the number allotted to the diagnosis code
that occurred.
Last Code No.
.
.
..
.
.
06: Periodic communication number of when
occurring in the diagnosis memory code.
Pressing TURN ºDOWNºPressing TURN ºUPº
21: Periodic communication number of when
occurring in the diagnosis memory code.
1: This is the number allotted to the diagnosis code
that occurred.
d1: DTC No.
1: This is the number allotted to the diagnosis code
that occurred.
360: Physical address
(Equipment that is communicating code)
± BODY ELECTRICALAUDIO SYSTEM
BE±193
2494 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(e) Diagnosis memory clear
(1) After error is fixed, start up the diagnosis mode.
(2) Continue pressing preset switch º5º for 2 secs. (CLr is displayed.)
(3) Press the preset switch º2º and transfer to the diagnosis memory mode and check that the normal
code (00) is output.

BE0GC±05
BE±196
± BODY ELECTRICALAUDIO SYSTEM
2497 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TROUBLESHOOTING
NOTICE:
When replacing the internal mechanism (computer part) of the audio system, be careful that no part
of your body or clothing comes in contact with the terminals of the leads from the IC, etc. of the re-
placement part (spare part).
HINT:
This inspection procedure is a simple troubleshooting which should be carried out on the vehicle during sys-
tem operation and was prepared on the assumption of system component troubles (except for the wires and
connectors, etc.).
Always inspect the trouble taking the following items into consideration.
Open or short circuit of the wire harness
Connector or terminal connection fault
For audio systems with anti±theft system, troubleshooting items marked ( * ) indicate that ºTrou-
bleshooting for ANTI±THEFT SYSTEMº should be carried out first.
ProblemNo.
RadioRadio not operating when power switch turned to 'ON'.1
Display indicates when power switch turned to 'ON', but no sound (including
'noise') is produced.2
Noise present, but AM ± FM not operating.3
Any speaker does not work.4
Any AM or FM does not work.5
Few preset turning bands.5
Reception poor.6
Sound quality poor.7
Preset memory disappears.8
Tape PlayerCassette tape cannot be inserted.9
Cassette tape inserted, but no power.10
Power coming in, but tape player not operating.11
Any speaker does not work.12
Sound quality poor.13
Tape jammed, malfunction with tape speed or auto±reverse.14
Cassette tape will not eject.15
CD PlayerCD cannot be inserted.16
CD inserted, but no power.17
Power coming in, but CD player not operating.18
Sound jumps.19
Sound quality poor (Volume faint).20
Any speaker does not work.21
CD will not be ejected.22
Power AmplifierNo power coming in.23
Power coming in, but power amplifier not operating.24
Any speaker does not work.25
NoiseNoise occurs26
Noise produced by vibration or shock while driving.27
Noise produced when engine starts.28
The term ºAMº includes LW,MW and SW, and the term ºFWº includes UKW.

V08418
Turn ignition Key from LOCK position to ACC position.
Troubleshooting for ANTI±THEFT SYSTEM
Display A:
ID Number is set.Display E:
ANTI±THEFT SYSTEM opera-
tion condition. (ID number input
error 10 times or more.)Display B
ºSECº display disappears after 1
second.Radio switch ON.
Take to designated radio
service station.Display BDisplay D
Refer to each
malfunction item.Normal
operation.
Radio switch ON. Normal operation.
Cancel ID number, refer to each malfunction item.
Ye s
No
OK
NG
ANTI±THEFT SYSTEM operation condition. (ID number input error 9 times or less.)
Input ID number to cancel ANTI±THEFT SYSTEM, and check display.
Display A"B Display B Display E
Display C"A
Radio switch ON.Refer to each
malfunction item.Take to designated
radio service station.ANTI±THEFT SYSTEM not can-
celled. (ID number input error 10
times or less.)
Display D
ANTI±THEFT SYSTEM cancelled.
Check audio system again.Normal operation.
OK
NG
Cancel ID number, refer to each malfunction item.
Liquid Crystal Display (LCD) or VFD for Audio System
Display ºAº Display ºBº Display ºCº
Display ºDº Example:Display ºEº
2 DIN Type
1 DIN TypeBlank
No Illumination
2 DIN Type
1 DIN Type 2 DIN Type
1 DIN Type Error Times2 DIN Type 1 DIN Type
Radio Display
1 DIN Type 2 DIN Type
HINT:

Refer to Owner's Manual for operation details of ANTI±THEFT SYSTEM.

When the ID number has been cancelled, reset the same number after completing the operation, or
inform the customer that it has been cancelled.
± BODY ELECTRICALAUDIO SYSTEM
BE±197
2498 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)