2000 LEXUS GS400 Service Repair Manual

I04105
Dark
(10k W)Bright
(0W)
4
5
I01322
Battery Ignition
SwitchWarning Light
2 1 Wire Harness Side
I01323
1 2 OFF
ON
I01328
Battery Ignition
SwitchWarning Light
2 1 Wire Harness Side
I04107
12
4
OFF
ON BE±102
± BODY ELECTRICALCOMBINATION METER
2403 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
30. INSPECT LIGHT CONTROL RHEOSTAT OPERATION
Gradually, turn the rheostat knob from the bright side to dark
side and check that the resistance decreases from 10 kW to 0
W between terminal 4 and 5. (Rheostat knob turned to clock-
wise)
If operation is not as specified, replace the rheostat light control.
31. INSPECT WINDOW WASHER LEVEL WARNING
LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Engine running and check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
32. INSPECT WINDOW WASHER LEVEL WARNING
SWITCH CONTINUITY
(a) Check that no continuity exists between the terminals with
the switch OFF (float up).
(b) Check that continuity exists between the terminals with
the switch ON (float down).
If operation is not as specified, replace the switch or inspect
ground point.
33. INSPECT SEAT BELT WARNING LIGHT
(a) Disconnect the connector from the retractor switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON and check that the warning
light lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
34. INSPECT SEAT BELT BUCKLE SWITCH CONTINUITY
(a) Check that continuity exists between the terminals 1 and
4 on the switch side connector with the switch ON (belt
fastened).
(b) Check that continuity exists between the terminals 2 and
4 on the switch side connector with the switch OFF (belt
unfastened).
If operation is not as specified, replace the switch.

I04108
Wire Harness Side
I04109
Press
Sensing part
± BODY ELECTRICALCOMBINATION METER
BE±103
2404 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
35. INSPECT SEAT BELT BUCKLE SWITCH CIRCUIT
Driver side: (See page DI±830)
Passenger side: (See page DI±785)
Disconnect the switch connector and inspect the connector on
wire harness side, as shown.
Tester connectionConditionSpecified condition
4 ± GroundConstantContinuity
If continuity is not as specified, inspect the circuits connected
to other parts.
36. Passenger seat only:
INSPECT SEAT BELT WARNING OCCUPANT DETEC-
TION SENSOR CONTINUITY
Check that continuity exists between the terminals 1 and 2
when pressing the sensing part.
If operation is not as specified, replace the sensor.
37. Passenger seat only:
INSPECT SEAT BELT WARNING OCCUPANT DETEC-
TION SENSOR CIRCUIT (See page DI±785)

BR0J9±01
± BRAKEBRAKE SYSTEM
BR±1
2109 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
BRAKE SYSTEM
GENERAL DESCRIPTION

Care must be taken to replace each part properly as it could affect the performance of the brake
system and result in a driving hazard. Replace the parts with parts of the same part number or
equivalent.

It is very important to keep parts and the area clean when repairing the brake system.

If the vehicle is equipped with a mobile communication system, refer to the precautions in the
IN section.

F01619
BR0JD±03
F01620
Adjusting Nut
Lock Nut
± BRAKEPARKING BRAKE PEDAL
BR±11
2119 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PARKING BRAKE PEDAL
ON±VEHICLE INSPECTION
1. CHECK PARKING BRAKE PEDAL TRAVEL
Depress the parking brake pedal all the way and count the num-
ber of clicks.
Parking brake lever travel at 294 N (30 kgf, 66.1 Ibf):
7 ± 9 clicks
2. IF NECESSARY, ADJUST PARKING BRAKE
HINT:
Before adjusting the parking brake, make sure that the rear
brake shoe clearance has been adjusted. For shoe clearance
adjustment see page BR±37.
(a) Loosen the lock nut and turn the adjusting nut until the
pedal travel is correct.
(b) Tighten the lock nut.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)

BR0JE±03
F07241
No. 1 Safety Pad
No. 1 Under Cover
Front Door Scuff Plate End Pad
Parking Brake Switch
Parking Brake Pedal
AssemblyParking Brake WireAdjusting NutLock Nut
13 (130, 9)
5.4 (55, 48 in.´lbf)
No. 7 Heater to Register Duct
N´m (kgf´cm, ft´lbf) : Specified torque BR±12
± BRAKEPARKING BRAKE PEDAL
2120 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

BR0JF±03
± BRAKEPARKING BRAKE PEDAL
BR±13
2121 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE FRONT DOOR SCUFF PLATE, END PAD, NO. 1 UNDER COVER, NO. 1 SAFETY PAD
AND NO. 7 HEATER TO REGISTER DUCT (See page BO±88)
2. REMOVE PARKING BRAKE PEDAL ASSEMBLY
(a) Disconnect the parking brake switch connector.
(b) Remove the 2 bolts, and disconnect the parking brake release lever from the safety pad.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
(c) Remove the lock nut and the adjusting nut from the parking brake wire.
(d) Remove the parking brake wire.
(e) Remove the 2 bolts, 2 nuts and parking brake pedal assembly.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
3. REMOVE PARKING BRAKE SWITCH
Remove the screw and parking brake switch from the parking brake pedal assembly.

BR0JG±02
BR±14
± BRAKEPARKING BRAKE PEDAL
2122 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page BR±13).
HINT:
After the installation, check and adjust parking brake pedal travel (See page BR±11).

BR0JH±05
F01622
Anti±squeal ShimPad Support Plate
Anti±squeal Spring
Inner Pad
Outer Pad
Anti±squeal Shim
Inner Anti±squeal Shim
Pad Support Plate
Inner Anti±squeal Shim34 (350, 25)
N´m (kgf´cm, ft´lbf) : Specified torque
Disc brake grease
± BRAKEFRONT BRAKE PAD
BR±15
2123 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FRONT BRAKE PAD
COMPONENTS