2000 LEXUS GS400 key

BE0GO±04
I04149
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±157
2458 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT WIRELESS DOOR LOCK TRANSMITTER
OPERATION
HINT:
Refer to ºWireless door lock control transmitter battery replace-
mentº on page BE±161.
(a) Using a screwdriver, remove the screw and cover.
(b) Remove the battery (lithium battery).
(c) Install a new or normal battery (lithium battery).
HINT:
When a new or normal battery can not be obtained, connect 2
new 1.5 V batteries in series, connect the battery (+) to the bat-
tery receptacle side terminal and battery (±) to the bottom termi-
nal, then apply 3 V voltage to the transmitter.
(d) In the location where is approx. 1 M away from driver's
outside handle in the right direction, face the key plate of
the transmitter to the vehicle, and check the transmitter
operation when pressing transmission switch on the side
of the transmitter body.
Standard:

Remote control of vehicle door lock can be operated.

LED lights up more than once.
HINT:

The minimum operation distance differs according to op-
erator, the way of holding the transmitter, and location.

As weak wave is used, operation distance might be short-
ened when noise is detected in strong wave or used fre-
quency.
(e) Install the battery (lithium battery).
(f) Install a cover so that O±ring is not distorted or slipped off.
(g) Using a screwdriver, tighten the screw.

I04153
From Back Side BE±160
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
2461 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. INSPECT WIRELESS DOOR LOCK CONTROL RE-
CEIVER CIRCUIT
Connector connected:
Connect the wire harness side connector to the receiver and in-
spect the wire harness side connector from the back side, as
shown.
Tester connectionConditionSpecified condition
3 ± Ground
Ignition switch position OFF
Key removed
Transmitter OFF " ON
4.5 ± 5.5 V " below 1 V
3 ± Ground
Ignition switch position OFF
Key removed
Transmitter OFF " ON
4.5 ± 5.5 V " below 1 V
4 ± Ground
Ignition switch position OFF
Key removed
Transmitter ON
10 ±14 V
If circuit is as specified, replace the receiver.
If the circuit is not as specified, inspect the circuits connected
to other parts.

BE0GP±09
I04154
I04155
I04156
Terminal
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±161
2462 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
1. REPLACE TRANSMITTER (LITHIUM) BATTERY
NOTICE:
Special caution should be taken for handling each compo-
nent as they are precision electronic components.
(a) Using a screwdriver, remove the screw and cover.
NOTICE:
Do not pry out the cover forcibly.
HINT:
Push the cover with a finger as shown in the illustration, so that
there becomes clearance, then pry out the cover from that
clearance.
(b) Remove the transmitter.
(c) Using a screwdriver, remove the 2 screws and cover.
(d) Remove the battery (lithium battery).
NOTICE:
Do not push the terminals with a finger.
If prying up the battery (lithium battery) forcibly to re-
move, the terminals are deformed.
(e) Install a battery (lithium battery) as shown in the illustra-
tion.
NOTICE:
Face the battery upward. Take care not to deform the termi-
nals.
(f) Check that O±ring is not distorted or slipped off, and
install the cover.
(g) Using a screwdriver, tighten the 2 screws.
NOTICE:
When the shrews are tightened loosely, it might cause
faulty contact of battery (lithium battery) and terminals.
(h) Assemble the transmitter to the key plate and the cover.
(i) Using a screwdriver, tighten the screw.

± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±163
2464 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
Start registration of recognition code
The vehicle should be in the following conditions.

Any door is OPEN. (Other doors are CLOSED)

Any door is UNLOCKED.

Insert the key into the ignition key cylinder, then pull it out.
Press the door lock control switch (for manual operation) 5 times to
LOCK/UNLOCK at approx. 1 sec. interval.
1st time 2nd time 3rd time 4th time 5th time
LOCK
OFF
UNLOCK
Approx.
1 sec.Approx.
1 sec.
Close the all door, then open the any door.
Again press the door lock control switch (for manual operation) 5 times to
LOCK/UNLOCK at approx. 1 sec. interval.
1st time 2nd time 3rd time 4th time 5th time
LOCK
OFF
UNLOCK
Approx.
1 sec.Approx.
1 sec.
Insert the key into the ignition key cylinder.
Within
40 secs.
Within
40 secs.

BE±164
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
2465 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
Within
3 secs.
Turn the ignition switch from ON to LOCK at approx. 1 sec. interval 1 to 5 times to select the mode.
Pull out the key plate from the ignition key cylinder.
When add mode or rewrite mode
is selected.When confirmation
mode is selected.
ON
ONON
LOCK
LOCKLOCK
Approx.
1 sec.Approx.
1 sec. Approx. 1 sec.Approx.
1 sec.Approx.
1 sec.
Add mode
Rewrite modeConfirmation mode
ON ± LOCK change occurs 1 time
ON ± LOCK change occurs 2 timesON ± LOCK change occurs 3 times
MPX body ECU automatically performs
the LOCK±UNLOCK operation once
or twice at 1 sec. interval to iniform the
operator that either the add mode or
rewrite mode has been selected.
LOCK±UNLOCK occurs once
LOCK±UNLOCK occurs twice
Indicates that add mode has been selected.
Indicates that rewrite mode has been
selected.
1 sec.
LOCK
1 sec.1 sec.
LOCK
UNLOCK
UNLOCK
LOCK
2 secs.2 secs.
UNLOCK MPX body ECU automatically performs the
LOCK±UNLOCK operation 1 to 4 times at
2 sec. interval to inform the operator of
the number of the registered codes.
HINT:
When the number of the registered code
is 0, the operation is automatically
performed 5 times.
Example:
When the operation is performed twice, it
directs that 2 types of recognition code
have been registered.
1st time 2nd time
Registration of recognition code (Confirmation
mode and prohibition mode) is completed.
ON
LOCK
Approx.
1 sec.Approx.
1 sec.
Prohibition mode
ON ± LOCK change occurs 5 times
When prohibition
mode is selected.

± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±165
2466 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
MPX body performs LOCK±UNLOCK operation 5 times at a 1 sec.
interval to inform the operator that prohibition mode has been selected.
Press again either one of 3 switches on the transmitter for more than 1 sec.
MPX body ECU automatically performs LOCK±UNLOCK operation once or
twice at a 1 sec. interval to inform the operator that the receiver has received the
signal from the transmitter.
LOCK±UNLOCK occurs once
LOCK±UNLOCK occurs twice Registration of recognition code is completed
Registration of recognition code has not been completed.

Recognition code received first time and second time did not match.
Proceed to continue registration
If even one of the following conditions is satisfied, registration of recognition
codes is completed.

40 secs. elapses since the MPX body ECU response.

The driver's door is closed.

The key plate is inserted in the ignition key cylinder.

4 type recognition codes are registration at one time.
Registration of recognition codes (add mode or rewrite mode) is completed.
Within
3 secs.Within
40 secs.
ON
LOCK
Approx.
1 sec.Approx.
1 sec.
When prohibition
mode is selected.
Press the lock and unlock switches on the transmitter simultaneously within 1 sec.
If LOCK±UNLOCK operation can not be performed at all, the mode returns to the
normal mode, then start with ºStart registration of recognition codeº.
Proceed to finish registration
Within 40 secs.

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.

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)