mirror LEXUS GS400 2000 Service User Guide

BE±180
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
2481 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) When driving position:
(1) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (±) lead to terminal 2, check
that the mirror operates at retract position.
(2) Reverse the polarity, check that the mirror does not
operate.
If operation is not as specified, replace the mirror assembly.
(d) Between driving position and retract position:
(1) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (±) lead to terminal 2, check
that the mirror operates at retract position.
(2) Reverse the polarity, check that the mirror operate
at return position (Stopping at driving position).
If operation is not as specified, replace the mirror assembly.
(e) When retract position:
(1) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (±) lead to terminal 2, check
that the mirror does not operates.
(2) Reverse the polarity, check that the mirror operate
at return position (Stopping at driving position).
If operation is not as specified, replace the mirror assembly.

BE0HC±06
I01369
Electro Chromic Outer Mirror
Electro Chromic Inner Mirror
Driver Side Junction Block

ECU±IG Fuse
± BODY ELECTRICALELECTRO CHROMIC MIRROR SYSTEM
BE±181
2482 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ELECTRO CHROMIC MIRROR SYSTEM
LOCATION

BE0HD±04
I05186
ºBrightº ºDarkº1
2
3
4
Black coloured tape
I04048
Wire Harnes Side BE±182
± BODY ELECTRICALELECTRO CHROMIC MIRROR SYSTEM
2483 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT ELECTRO CHROMIC INNER MIRROR OP-
ERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 4.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 2 and the negative (±) lead to terminal 3.
(c) Attach a black coloured tape to forward sensor to prevent
it from sensing.
(d) When the mode is turned to AUTO, check that indicator
light lights up.
(e) Light up the mirror with an electric light, and check that
there is battery positive voltage and mirror surface
changes ºbrightº to ºdarkº.
If operation is not as specified, replace the inner mirror.
2. INSPECT ELECTRO CHROMIC INNER MIRROR CIR-
CUIT
Disconnect the connector from the mirror and inspect the con-
nector on the wire harness side, as shown.
Tester connectionConditionSpecified condition
4 ± GroundConstantContinuity
1 ± GroundIgnition switch LOCK or ACCNo voltage
1 ± GroundIgnition switch ONBattery positive voltage
If circuit is not as specified, inspect the circuits connected to
other parts.

I04178
ºBrightº
ºDarkºw/o Memory
2 1
I04179
ºBrightº
ºDarkºw/ Memory
5 4
± BODY ELECTRICALELECTRO CHROMIC MIRROR SYSTEM
BE±183
2484 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. w/o Driving position memory:
INSPECT ELECTRO CHROMIC OUTER MIRROR OP-
ERATION
(a) Disconnect the outer mirror connector.
(b) Connect the positive (+) lead from the dry cell battery to
terminal 2 and the negative (±) lead to terminal 1, then
check that the mirror surface changes to ºdarkº.
(c) Check the mirror turns to ºbrightº after disconnecting the
battery.
If operation is not as specified, replace the mirror assembly.
4. w/ Driving position memory:
INSPECT ELECTRO CHROMIC OUTER MIRROR OP-
ERATION
(a) Disconnect the outer mirror connector.
(b) Connect the positive (+) lead from the dry cell battery to
terminal 5 and the negative (±) lead to terminal 4, then
check that the mirror surface changes to ºdarkº.
(c) Check the mirror turns to ºbrightº after disconnecting the
battery.
If operation is not as specified, replace the mirror assembly.

BE±28
± BODY ELECTRICALPOWER SOURCE
2329 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(a) Remove the fuse from the junction block and inspect the
connector on junction block side.
Fuse Tester connectionConditionSpecified condition
DEF 1 ± GroundConstantBattery positive voltage
MIR HTR 7 ± GroundIgnition switch ONBattery positive voltage
S/ROOF 13 ± GroundConstantBattery positive voltage
P FR DOOR 15 ± GroundConstantBattery positive voltage
P/SEAT (P) 23 ± GroundConstantBattery positive voltage
DOME 25 ± GroundConstantBattery positive voltage
S±HTR 27 ± GroundIgnition switch ONBattery positive voltage
TV 31 ± GroundConstantBattery positive voltage
ECU±B2 33 ± GroundConstantBattery positive voltage
P FR DOOR 41 ± GroundConstantBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
(b) Remove the relay from the junction block and inspect the
connector on junction block side.
Relay Tester connectionConditionSpecified condition
Ignition Main 43 ± GroundIgnition switch ONBattery positive voltage
Mirror Heater 47 ± GroundIgnition switch ONBattery positive voltage
Mirror Heater 50 ± GroundConstantBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.

BE±10
± BODY ELECTRICALTROUBLESHOOTING
2311 Author: Date:
2000 LEXUS GS300/GS400 (RM718U) Malfunction indicator light does not light up.
1. Bulb
2. Meter Circuit Plate
3. Wire Harness
4. ECM (2JZ±GE)
5. ECM (1UZ±FE)±
BE±92
±
DI±1
DI±156
Fuel level warning light does not light up.
1. Bulb
2. Fuel level warning sensor
3. Meter Circuit Plate
4. Wire Harness±
±
BE±92
±
ELECTRIC TENSION REDUCER SYSTEM
SymptomSuspect AreaSee page
Tension Reducer does not operate.
(Driver's and Passenger's)1. ECU±IG Fuse
2. Wire HarnessBE±21
±
Tension Reducer does not operate.
(Only one side)1. Buckle Switch
2. Tension Reducer Solenoid
3. Wire HarnessBE±92
BE±92
±
DEFOGGER SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
Rear window defogger does not operate.
1. HTR Fuse
2. DEF M±Fuse
3. Defogger Relay Circuit
4. Defogger Switch (in A/C Panel Switch)
5. Defogger Wire
6. Wire Harness
7. Body No.1 ECUBE±21
BE±21
DI±812
BE±108
BE±108
±
DI±776
Mirror defogger does not operate.
1. MIR±HTR Fuse (Passenger SIde J/B)
2. Mirror Heater Relay
3. Mirror Heater
4. Wire HarnessBE±21
BE±108
BE±108
±
POWER WINDOW CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
SymptomSuspect AreaSee page
All the power windows do not operate.
(Power Door Lock System is normal.)
1. PWS terminal circuit
2. Power Window Master Switch
3. Wire Harness
4. Driver Door ECU
5. Body No.1 ECUDI±818
BE±117
±
DI±856
DI±776
Only the driver's window does not operate.
1. Power Window Master Switch
2. Power WIndow Switch
3. Power Window Motor
4. Wire HarnessBE±117
BE±117
BE±117
±
ºWindow lock functionº does not operate.1. Power Window Master SwitchBE±117
Window does not operate with power window master switch.
(Manual or Automatic operation can be performed.)TROUBLESHOOTING NO.1BE±111
Remote control of all windows (Except driver's) does not functions
with master switch.
(Windows operate normally with each of master switch.)
TROUBLESHOOTING NO.2BE±111

± BODY ELECTRICALTROUBLESHOOTING
BE±13
2314 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER SEAT CONTROL SYSTEM
SymptomSuspect AreaSee page
Both Driver and Passenger Power seats do not operate.
(Door lock does not operate.)1. ALT M±Fuse
2. Wire HarnessBE±21
±
Driver's seat does not operate.
1. P/SEAT (D) Fuse
2. Power Seat Switch (D)
3. Wire HarnessBE±21
BE±167
±
Passenger's seat does not operate.
1. P/SEAT (P) Fuse
2. Power Seat Switch (P)
3. Wire HarnessBE±21
BE±167
±
ºSlide operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Slide Motor (D, P)BE±167
±
BE±167
ºFront Vertical Operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Front Vertical Motor (D, P)BE±167
±
BE±167
ºLifter Operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Lifter Motor (D, P)BE±167
±
BE±167
ºReclining Operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Reclining Motor (D, P)BE±167
±
BE±167
ºLumbar Support Operationº does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Lumbar Support Motor (D, P)BE±167
±
BE±167
(D): Driver's Seat
(P): Passenger's Seat
POWER MIRROR CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
w/ Driving Position Memory System:
SymptomSuspect AreaSee page
Both right and left mirrors do not operate.
1. Mirror Switch
2. Wire Harness
3. Body No.2 ECUBE±176
±
DI±820
Only one side of mirror does not operate.
1. Mirror Motor
2. Wire Harness
3. Driver and Passenger Door ECUBE±176
±
DI±856
DI±889
The mirror does not return to the memorized position.
1. Mirror Position Sensor
(Position is not set)
2. Wire Harness
3. Power Seat Control ECU
BE±176
±
DI±683
The memorized position is moved.
1. Mirror Position Sensor
(Position is not set)
2. Wire Harness
BE±176
±

BE±14
± BODY ELECTRICALTROUBLESHOOTING
2315 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
w/o Driving Position Memory System:
SymptomSuspect AreaSee page
Mirror does not operate.
1. Mirror Switch
2. Wire Harness
3. Body No.2 ECU
4. Driver and Passenger Door ECUBE±176
±
DI±820
DI±856
DI±889
Mirror operates abnormally.
1. Mirror Switch
2. Mirror Motor
3. Wire Harness
4. Body No.2 ECU
5. Driver and Passenger Door ECUBE±176
BE±176
±
DI±820
DI±856
DI±889
ELECTRO CHROMIC MIRROR SYSTEM
SymptomSuspect AreaSee page
Electro Chromic Inner Mirror does not operate.
1. ECU±IG Fuse
2. Electro Chromic Inner Mirror
3. Wire HarnessBE±21
BE±182
±
Electro Chromic Outer Mirror does not operate.
1. ECU±IG Fuse
2. Electro Chromic Outer Mirror
3. Electro Chromic Inner Mirror
4. Wire HarnessBE±21
BE±182
BE±182
±
SEAT HEATER SYSTEM
SymptomSuspect AreaSee page
Seat heaters do not operate.
(Driver's and Passenger's)
1. SEAT HTR Fuse
2. Seat Heater Switch (D, P)
3. Wire Harness
4. Seat HeaterBE±21
BE±185
±
BE±185
Driver's seat heater does not operate.1. Seat Heater Switch (D, P)
2. Wire HarnessBE±185
±
Passenger's seat heater does not operate.1. Seat Heater Switch (D, P)
2. Wire HarnessBE±185
±
Seat heater temperature is too hot.Seat HeaterBE±185
FUEL LID OPENER SYSTEM
SymptomSuspect AreaSee page
Fuel lid opener system does not operate.
1. FUEL OPN Fuse
2. Fuel Lid Opener Switch
3. Fuel Lid Opener Motor
4. Wire HarnessBE±21
BE±188
BE±188
±
AUDIO SYSTEM
SymptomSuspect AreaSee page
Audio system abnormal operation.TROUBLESHOOTINGSBE±196
CLOCK SYSTEM
SymptomSuspect AreaSee page
Passenger seat belt warning system does not light up.TROUBLESHOOTING NO.1BE±227
Clock will not operate.TROUBLESHOOTING NO.1BE±227
Clock loses or gains time.TROUBLESHOOTING NO.2BE±227

IN0EI±01
BO4111
Negative Cable
IN±10
± INTRODUCTIONFOR ALL OF VEHICLES
10 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FOR ALL OF VEHICLES
PRECAUTION
1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER
(a) The LEXUS GS400/GS300 is equipped with an SRS
(Supplemental Restraint System), such as the driver air-
bag, front passenger airbag assembly, side airbag as-
sembly and seat belt pretensioners.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.
(b) GENERAL NOTICE
(1) Malfunction symptoms of the supplemental re-
straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See page DI±552).
(2) Work must be started after 90 seconds from the
time the ignition switch is turned to the ºLOCKº posi-
tion and the negative (±) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back±up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (±) terminal cable from the battery, the SRS
may deploy.)
When the negative (±) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
This vehicle has power tilt and power telescopic
steering, power seat and power outside rear view
mirror, which are all equipped with memory function,
it is not possible to make a record of the memory
contents. So when the work is finished, therefore it
will be necessary to explain this fact to the custom-
er, and ask the customer to adjust the features and

MA002±06
MA±2
± MAINTENANCEINSIDE VEHICLE
45 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSIDE VEHICLE
GENERAL MAINTENANCE
These are maintenance and inspection items which are considered to be the owner's responsibility.
They can be done by the owner or they can have them done at a service shop.
These items include those which should be checked on a daily basis, those which, in most cases, do not
require (special) tools and those which are considered to be reasonable for the owner to do.
Items and procedures for general maintenance are as follows.
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
otherwise noted.

Failure to do even one item an cause the engine to run poorly and increase exhaust emissions.
2. LIGHTS
(a) Check that the headlights, stop lights, taillights, turn signal lights, and other lights are all working.
(b) Check the headlight aiming.
3. WARNING LIGHTS AND BUZZERS
Check that all warning lights and buzzers function properly.
4. HORN
Check that it is working.
5. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
6. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
7. WINDSHIELD DEFROSTER
Check that air comes out from the defroster outlet when operating the heater or air conditioner.
8. REAR VIEW MIRROR
Check that it is mounted securely.
9. SUN VISORS
Check that they move freely and are mounted securely.
10. STEERING WHEEL
Check that it has the specified freeplay. Be alert for changes in steering condition, such as hard steering,
excessive freeplay or strange noises.
11. SEATS
(a) Check that all front seat controls such as seat adjusters, seatback recliner, etc. operate smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the locks hold securely in any latched position.
(d) Check that the head restraints move up and down smoothly and that the locks hold securely in any
latches position.
(e) For folding±down rear seat backs, check that the latches lock securely.
12. SEAT BELTS
(a) Check that the seat belt system such as the buckles, retractors and anchors operate properly and
smoothly.
(b) Check that the belt webbing is not cut, frayed, worn or dameged.