LEXUS SC400 1991 Service Repair Manual

GENERAL INFORMATION
1. BASIC DIMENSIONS
(a) There are two types of dimensions in the diagram.(Three-dimensional distance)

Straight-line distance between the centers of two
measuring points.
(Two-dimensional distance)

Horizontal distance in forward/rearward between
the centers of two measuring points.

The height from an imaginary standard line.
(b) In cases in which only one dimension is given, left and right are symmetrical.
(c) The dimensions in the following drawing indicate actual distance. Therefore, please use the dimen-
sions as a reference.
2. MEASURING
(a) Basically, all measurements are to be done with atracking gauge. For portions where it is not possible
to use a tracking gauge, a tape measure should be
used.
(b) Use only a tracking gauge that has no looseness in the body, measuring plate, or pointers.
HINT:
1. The height of the left and right pointers must be equal.
2. Always calibrate the tracking gauge before measuring or after adjusting the pointer height.
3. Take care not to drop the tracking gauge or otherwise shock it.
4. Confirm that the pointers are securely in the holes.
(c) When using a tape measure, avoid twists and bends in the tape.
(d) When tracking a diagonal measurement from the front spring support inner hole to the suspension
member upper rear installation hole, measure
along the front spring support panel surface.
Center-to-center
straight-line
distance
Three-dimensional
distance
Front Spring Support Inner HoleTape Measure
Along Body
Surface Front Suspension Member Rear Side
Upper Installation Hole Master Gauge
Pointer
Pointer LoosenessBody Looseness
Plate Looseness
Two-dimensional
distance
Center-to-center
Horizontal distance in
forward/rearward
Vertical distance
in lower surface
Vertical distance
in center
Imaginary Standard Line
Wrong Correct
Pointer
BODY DIMENSIONSDI-2
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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
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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
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BO6847
mm (in.)
(Three-Dimensional Distance)
Hole dia.
10 (0.39) screw
14 (0.55) screw
10 (0.39) screw
Name
Propeller shaft center support bearing installation nut
Rear suspension member installation nut
Suspension member bracket installation nut rear = outer
Symbol
K, k
N, n
P, p
Hole dia.
9 (0.35)
18 (0.71)
10 (0.39) screw
Name
Front crossmember working hole
Front suspension crossmember installation nut
Engine rear mounting member installation hole
Symbol
B, bH, h J, j
UNDER BODY (Cont'd)
BODY DIMENSIONSDI-5
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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
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BO6847
NOTICE: True up the mounting section ofthe front airbag sensor very carefully and
accurately so that the sensor can bemounted at the correct angle.
Imaginary
Standard
Line
mm (in.)
(Two-Dimensional Distance)
Hote dia.
10 (0.39) nut
10 (0.33) nut
18 (0.71)
14 (0.55) nut 9 (0.35)
Name
Engine rear mounting member installation nut-front Propeller shaft center support bearing installation nut
Front floor reinforcement standard hole
Rear suspension member installation nut Rear spring support hole-front
Symbol
J, j
K, k
L, l
N, n
O, o
Hole dia.
9 (0.35)
9 (0.35)
8 (0.31) nut
13 y11 (0.51 y0.43)14 (0.55) nut
Name
Front crossmember working hole
Airbag front sensor installation hole
Airbag front sensor installation nut Front spring support hole = outer
Front suspension crossmember installation nut
Symbol
B, b
C, c
E, e
G, g H, h
UNDER BODY (Cont'd)
BODY DIMENSIONSDI-7
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BO6848
E-e
1,304
(51.34) 1,500
(69.06)F-fVehicle Dimensions Left
eRight
G-g
1,511
(59.49) H-h
1,511
(59.49) I-i
1,083
(42.64) 1,363
(53.66)J-j
1,503
(59.17)K-k
E-f
or
e-F
1,536
(60.47) 1,577
(62.09)E-g
or
e-G
1,694
(66.69)E-h
or
e-H
1,587
(62.48)E-j
or
e-J
1,909
(75.16)F-j
or
f-J
HINT: For symbols, Capital letters indicate
right side of vehicle, small letters indicate
left side of vehicle (See from rear).
F-k
or
f-K
1,945
(76.57) G-h
or
g-H
1,665
(65.55) H-i
or
h-I
1,568
(61.73) 1,595
(62.80)H-j
or
h-J
1,490
(58.66)
mm (in.)J-k
or
j-K
(Three-Dimensional Distance)
Hote dia.
Name
Rocker panel adjoining portion mark
Rocker panel adjoining portion mark
Roof side rail adjoining portion mark
Quarter panel adjoining portion mark
Quarter panel adjoining portion mark
Symbol
G, g
H, h
I, i
J, j
K, k
Hole dia.
10 (0.39) screw
10 (0.39) screw
Name
Roof panel/Front body pillar adjoining portion
Cowl top panel/Front body pillar adjoining portion
Front door hinge installation nut
D, d Front door hinge installation nut
Front body pillar adjoining portion mark
Front body pillar adjoining portion mark
Symbol
A, a
B, b
C, c
E, e
F, f
BODY OPENING AREAS (Side View)
BODY DIMENSIONSDI-8
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BO6849
mm (in.)
(Three-Dimensional Distance)
Hole dia.18 (0.71)
Name
Opening trough/Lower back panel adjoining portion
Upper back panel center mark
Rear floor side member standard hole
Symbol
P, pQ
R, r
Hole dia.
Name
Roof panel/Quarter panel adjoining portion
Quarter panel/Upper back panel adjoining portion
Quarter panel/Upper beck panel adjoining portion
Opening trough/Quarter panel adjoining portion
Symbol
L, l
M, m
N, n
O, o
BODY OPENING AREAS (Rear View)
BODY DIMENSIONSDI-9
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mm (in.)
BO6850
BO6850
(Three-Dimensional Distance) (Three-Dimensional Distance)
SymbolName Hole dia. Symbol Name
Hole dia.
A, a Steering gear box installation hole
front 12 (0.47)
E, eLower arm installation hole-front
25
y16
(0.98 y0.63)
B, b Upper arm installation hole front 14 (0.55) F, f Lower arm installation hole rear25
y16
(0.98 y0.63)
C, c Suspension crossmember installation
hole front - lower
15 (0.59) G, g Upper arm installation hole rear
14 (0.55)
D, d Steering gear box installation hole-
lower 12 (0.47)
H, hSuspension crossmember installation
hole rear-lower
RH 15
y13 (0.59 y0.51)
LH 13 (0.51)
SUSPENSION CROSSMEMBER DIMENSION DRAWINGS
BODY DIMENSIONSDI-10

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mm (in.)
BO6851
BO6851
(Two-Dimensional Distance) (Three-Dimensional Distance)
SymbolName Hole dia. Symbol Name Hole die.
I, i Suspension crossmember installation
hole front-lower
18 (0.71) L, lSuspension crossmember installation
hole rear-lower 18 (0.71)
J, j Lower arm installation hole-front 30
y16
(1.18 y0.63) M, mSuspension crossmember installation
hole rear-lower
18 (0.71)
K, k Lower arm installation hole rear 30
y16
(1.18 y0.63)
Suspension Crossmember (Cont'd)
BODY DIMENSIONSDI-11
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