radiator LEXUS SC400 1991 Service User Guide

Description
The power source supplies power to each of the vehicle's electrical devices. It is composed of the battery, fuses
and relays, which are located centrally at relay block No. 2 and relay block No. 6 i\
n the engine compartment
and junction block No. 1 relay block No. 4 and relay block No. 5 in the \
cabin near the driver's feet.
Related systems for each Fuse
No.Part NameRelated Systems or Parts
1IGN
Charging System
AIR±BAG System1IGN
Engine
2ST
Starter
3WIPER
Wiper and Washer System
4HTR
Defogger System
A/C System
5ENGINE
Charging System
6RADIO NO. 2
Audio System
Power Mirror System

Cigarette Lighter
A/C System
7CIG
Combination Meter System
AIR±BAG System7CIG
Shift Lock System
Theft Deterrent System

TEL System
8STOP
Stop Light System
Cruise Control System
9TURN
Turn Signal and Hazard
Warning Light System
Cornnering Light System
10MIR HTR
Mirror Heater System
11PANEL
Illumination Light System
12ECU±B
Combination Meter System
AIR±BAG System

Combination Meter System
ECT System
13GAUGE
Back±Up Light
Transmission Indicator

Light Failare Sensor
ABS and TRAC

Power Seat System
Door Lock Control System

TEL System
Shift Lock System
14ECU±IG
Radiator Fan
Auto Antenna

Electric Tension Reducer System
Power Steering

Auto±Tilt away Steering
Cruise Control System
15TAIL
Taillight System
Side Marker15TAIL
Clearance Light
16DOOR
Power Seat System
Luggage Door Opener16DOOR
Door Lock Control System
Fuel Lid Opener System
17IG SWUpstream of ECU±IG, ENGINE, WIP, HTR, TURN, GAUGE, and ST Fuse
18PWR
Power Window System
Sliding Roof System
19ABS NO. 1
ABS and TRAC
20AM1Upstream of MIR HTR, TAIL, PANEL, STOP, ECUA±B, DOOR and PWR Fuse
21ALTUpstream of DEF, HTR, AM1, and ABS No. 1 Fuse
BE±18±
BODY ELECTRICAL SYSTEM Power Source
WhereEverybodyKnowsYourName

Parts NameFunction
Coolant Level
Warning SwitchThis switch is installed in the radiator reservoir tank. It lights up a \
warning light when the
coolant level becomes low.
Engine Oil Level
Warning SwitchThis switch is mounted in the engine oil pan. It lights a warning light \
when the engine oil
level is low.
Brake Fluid Level
Warning SwitchThis switch is mounted in the brake master cylinder reservoir tank. It l\
ights up a warning
light when the brake fluid level is low.
Parking Brake SwitchThis switch is on the parking brake lever bracket. Continuity in this sw\
itch is established
when the lever is released, causing a warning light to light up.
Door Courtesy SwitchContinuity is established in this switch when a door is opened, causing \
a warning light to
light up.
Warning LightsWhen an abnormality is detected in the vehicle, current is sent to these\
lights, or they are
grounded, causing them to light up.
Indicator LightsCurrent is sent to these lights, or they are grounded, causing them to l\
ight up and indicate
the vehicle's condition to the driver.
Window Washer Level
Warning SwitchThis switch is mounted in the window washer tank. It lights a warning li\
ght when the
window washer level becomes low.
±
BODY ELECTRICAL SYSTEM Cominbation MeterBE±97
WhereEverybodyKnowsYourName

Front Door Trim Upper Panel (ABS/PVC)
Battery Insulator (PE) Roof Side Inner Garnish (ABS/PVC)
Front Pillar Garnish (ABS/PVC)
Speed Control Actuator Cover (PP)
Radiator Reserver Tank (PP)
Radiator Cover Plate (PP) Cool Air Intake
Duct (PP)
Spare Wheel Cover (PP)
Washer Jar (PP)
Junction Block Cover (PP)
Front Fender Liner (PE)
Front Fender Splash Shield (PE)
Engine Under Cover (PE) Engine Under Cover (PE)
Engine Under Cover (PP/PE)
HINT:
wResin material differs with model.
/ Made up of 2 or more kinds of materials.
PLASTIC BODY PARTSPP-5
WhereEverybodyKnowsYourName

RADIATOR UPPER SUPPORT (ASSY)
REMOVAL
BODY PANEL REPLACEMENTRE-2
WhereEverybodyKnowsYourName

FRONT FENDER FRONT APRON (ASSY)
REMOVAL (With the radiator upper support removed.)
Apron Fender Side Extension
1. Replace the apron fender side extension at thesame time.
BODY PANEL REPLACEMENTRE-6
WhereEverybodyKnowsYourName

FRONT FENDER APRON (ASSY)
REMOVAL (With the radiator upper support removed.)
BODY PANEL REPLACEMENTRE-10
WhereEverybodyKnowsYourName

mm in.50
70 1.97
2.76
FRONT SIDE MEMBER (CUT-P)
REMOVAL (With the radiator upper support and front
crossmember removed.)
70 mm
Cut and Join Location
(Inner Member and Reinforcement)
50 mm
Cut and Join Location
(Outer Plate)
1. Cut and join the parts at the location shown above.
HINT: Shift the cut and join location of the outer plate,
inner member and the reinforcement.
BODY PANEL REPLACEMENTRE-14
WhereEverybodyKnowsYourName

mm (in.)
BO6846
BO6860
1,218
(47.95)392
(15.43)
H-U
h-u
K-o
k-O 1,186
(46.69)
H-T
h-t
393
(15.47)
D-U
D-u 379
(14.92)
G-U
g-u
1,158
(45.59)
D-T
D-t G-T
g-t
366
(14.41)
1,299
(51.14)
D-S
D-s 151
(5.94)
1,260
(49.61)
D-R
D-r
J-S
j-s187
(7.36)
1,215
(47.83)
D-Q
D-q
J-R
j-r1,192
(45.92)
1,201
(47.28)
K-q
k-Q
D-P
D-p 1,033
(40.67)
1,143
(45.0)
K-p
k-P
D-O
D-o
Vehicle Dimensions
1,689
(66.50)
847
(33.35)
205
(8.19)
1,460
(57.48) C-K, c-k
C-K, c-k
A-K, a-k
A-a
Vehicle Dimensions
*1 851 (33.50)
(Three-Dimensional Distance)
Symbol Name Hole dia. Symbol Name Hole dia.
A, a Front fender apron standard hole 10 (0.39)
L, l Front fender installation nut
6 (0.24) nut
B, b Front spring support hole-front
11 (0.43)M, m Hood hinge installation nut-rear
8 (0.31) nut
C, c Cowl side panel standard hole
10 (0.39)N, n Front fender installation nut-rear
6 (0.24) nut
D Cowl top panel center mark
O, oHead light installation nut
6 (0.24) nut
E, e Front side member working hole
18 (0.71)P, pHead light installation nut
6 (0.24) nut
F, f Front side member working hole
18 (0.71)Q, qHead light installation nut
6 (0.24) nut
G, g Radiator support standard hole
10 (0.39)R, rHead light installation nut
6 (0.24) nut
H, h Radiator support standard hole
10 (0.39)S, sHead light installation hole
11 (0.43)
I, i Front fender apron standard hole 10 (0.39)T, t Head light installation hole 10 (0.39)
J, j Front side member standard hole
8 (0.31)U, u Head light installation hole 10 (0.39)
K, k Front fender installation nut-front
6 (0.24) screw
BODY DIMENSION DRAWINGS
ENGINE COMPARTMENT
BODY DIMENSIONSDI-3
WhereEverybodyKnowsYourName

BO6847
mm (in.)
(Three-Dimensional Distance)
Hole dia.
18 (0.71)
18 (0.71)
10 (0.39) screw
12 (0.47) screw
Name
Front floor reinforcement standard hole
Rear floor side member standard hole
Suspension member bracket installation nut rear = outer
Transport hook installation nut front = outer
Symbol
L, l
M, m
P, p
Q, q
Hole dia.
6 (0.24) screw
18 (0.71) 13 (0.51)
18 (0.71)
Name
Radiator duct installation nut
Front side member standard holeFront suspension crossmember installation hole
Front side member standard hole
Symbol
A, a
D, d F, f
I, i
UNDER BODY
BODY DIMENSIONSDI-4
WhereEverybodyKnowsYourName

BO6847
mm (in.)
(Two-Dimensional Distance)
Hole dia.
18 (0.71) 18 (0.71)
10 (0.39) screw
12 (0.47) screw
Name
Front floor reinforcement standard hole
Rear floor side member standard hole
Suspension member bracket installation nut rear = outer
Transport hook installation nut front = outer
Symbol
L, l
M, m P, p
Q, q
Hole dia.
6 (0.24) screw
18 (0.71)
13 (0.51)
18 (0.71)
Name
Radiator duct installation nut
Front side member standard hole
Front suspension crossmember installation hole
Front side member standard hole
Symbol
A, aD, d F, f
I, i
UNDER BODY (Cont'd)
BODY DIMENSIONSDI-6
WhereEverybodyKnowsYourName