2000 LEXUS GS400 mirror

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.

BE0GS±10
I01362
Defogger WireIgnition SwitchDefogger Switch
Defogger Switch
Mirror Assembly

Mirror Defogger
LEXUS navigation
System
Passenger Side
Junction Block

DEF M±Fuse

MIR HTR Fuse

Mirror Defogger Relay
Mirror Assembly

Mirror Defogger
Passenger Cowl Side
Relay Block

Defogger Relay
± BODY ELECTRICALDEFOGGER SYSTEM
BE±107
2408 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DEFOGGER SYSTEM
LOCATION

I01200
2 1
35
2 5
1 3
I01291
Tester Probe
Tin FoilHeat Wire
I01292
At Center
I01293
0 Volts
Broken
WireSeveral
Volts
Battery
side Ground sideFoil strip


± BODY ELECTRICALDEFOGGER SYSTEM
BE±109
2410 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. INSPECT MIRROR DEFOGGER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
6. INSPECT MIRROR DEFOGGER RELAY CIRCUIT
(See page BE±21)
7. INSPECT DEFOGGER WIRE
NOTICE:

When cleaning the glass, use a soft, dry cloth, and wipe the
glass in the direction of the wire. Take care not to damage
the wires.

Do not use detergents or glass cleaners with abrasive in-
gredients.

When measuring voltage, wrap a piece of tin foil around the
tip of the negative probe and press the foil against the wire
with your finger, as shown.
(a) Turn the ignition switch ON.
(b) Turn the defogger switch ON.
(c) Inspect the voltage at the center of each heat wire, as
shown.
VoltageCriteria
Approx. 5VOkay (No break in wire)
Approx. 10V or 0VBroken wire
HINT:
If there is approximately 10 V, the wire is broken between the
center of the wire and the positive (+) end. If there is no voltage,
the wire is broken between the center of the wire and ground.
(d) Place the voltmeter positive (+) lead against the defogger
wire on the battery side.
(e) Place the voltmeter negative (±) lead with the foil strip
against the wire on the ground side.
(f) Slide the positive (+) lead from battery to ground side.
(g) The point where the voltmeter deflects from several V to
zero V is the place where the defogger wire is broken.
HINT:
If the heat wire is not broken, the voltmeter indicates 0 V at the
positive (+) end of the heat wire but gradually increases to about
12 V as the meter probe moves to the other end.

I01294
Repair Point
Broken
Wire
Marking Tape
I01295
I04115
78
I04269
12 13
BE±110
± BODY ELECTRICALDEFOGGER SYSTEM
2411 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
8. IF NECESSARY, REPAIR DEFOGGER WIRE
(a) Clean the broken wire tips with grease, wax and silicone
remover.
(b) Place the masking tape along both sides of the wire for
repair.
(c) Thoroughly mix the repair agent (Dupont paste No.
4817).
(d) Using a fine tip brush, apply a small amount of the agent
to the wire.
(e) After a few minutes, remove the masking tape.
(f) Do not repair the defogger wire for at least 24 hours.
9. w/ Mirror heater (w/o Driving position memory):
INSPECT MIRROR DEFOGGER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
7 and the negative (±) lead to terminal 8.
(b) Check that the mirror becomes warm.
HINT:
It will take a short time for the mirror to become warm.
10. w/ Mirror heater (w/ Driving position memory):
INSPECT MIRROR DEFOGGER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
12 and the negative (±) lead to terminal 13.
(b) Check that the mirror becomes warm.
HINT:
It will take a short time for the mirror to become warm.

I04030
Fuses
Relays 1. DEF H±Fuse
2. ±
3. ±
4. MIR HTR Fuse
A. Ignition Main Relay
B. Mirror Heater Relay
E. Body ECU No.1
Passenger Side Instrument Panel Junction Block
5. ±
6. ±
7. S/ROOF Fuse
8. P FR DOOR Fuse
9. ±
10. ±
11 .
12. P/SEAT (P) Fuse
13. DOME Fuse
14. SEAT HTR Fuse
15. ±
16. TV Fuse
17. ECU±B2 Fuse
18. ±
19. ±
20. ±
21. P FR DOOR Fuse
2
21 34 5
67 8 9
10 11 12 13
14 15 16 17
18 19 20AB
E
C. Defogger Relay
D. Heater Relay
CD
1
BE±20
± BODY ELECTRICALPOWER SOURCE
2321 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

BE02J±10
I01368
Mirror Assembly

Mirror Motor
Mirror Switch

Left/Right Adjustment Switch

Mirror Control SwitchIgnition Switch
Driver Side Junction Block

Body ECU No.2
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE±175
2476 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER MIRROR CONTROL SYSTEM
LOCATION

BE10W±02
I04167
Left/Right Adjustment Switch
Mirror Switch
9
7
6
5 8
I07733
Retract Switch
Mirror Switch
Left/Right
Adjustment Switch
Mirror Switch
Retract Switch 9
8
7
6
5
BE±176
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
2477 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. USA/CANADA models:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionResistance (W)
LEFT8 ± 9100
RIGHT8 ± 90
Illumination5 ± 6Continuity
Measure resistance between terminals 7 and 9.
Switch positionResistance (W)
UPApprox. 100
RIGHT250
DOWN470
LEFT800
If continuity is not as specified, replace the switch.
2. USA/CANADA models:
INSPECT MIRROR SWITCH CIRCUIT
(See page DI±837)
3. TAIWAN model:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionResistance (W)
LEFT8 ± 9100
RIGHT8 ± 90
Illumination5 ± 6Continuity
Measure resistance between terminals 7 and 9.
Switch positionResistance (W)
UPApprox. 100
RIGHT250
DOWN470
LEFT800
If continuity is not as specified, replace the switch.
4. TAIWAN model:
INSPECT RETRACT SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
ON1 ± 2Continuity
If continuity is not as specified, replace the switch.
5. TAIWAN model:
INSPECT MIRROR SWITCH CIRCUIT
(See page DI±837)

I04270
5 4
I04271
5 4
I04272
56
I04273
56
I04168
12
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE±177
2478 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. w/o Driving position memory:
INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
4 and the negative (±) lead to terminal 5, and check that
the mirror turns to the left side.
(b) Reverse the polarity, and check that the mirror turns to the
right side.
(c) Connect the positive (+) lead from the battery to terminal
6 and the negative (±) lead to terminal 5, and check that
the mirror turns upward.
(d) Reverse the polarity, and check that the mirror turns
downward.
If operation is not as specified, replace the mirror assembly.
7. w/o Driving position memory:
INSPECT MIRROR MOTOR CIRCUIT
Left side: (See page DI±882)
Right side: (See page DI±916)
8. w/ Driving position memory:
INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the mirror turns to the left side.