suspension LEXUS SC300 1991 Service User Guide

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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mm (in.)
BO6852
BO6852
(Two-Dimensional Distance) (Three-Dimensional Distance)
SymbolName Hole dia.
Symbol Name Hole dia.
A, a Strut bar installation hole inner
14 (0.55)F, fLower arm installation hole front 26
y14
(1.02 y0.55)
B, b Differential carrier installation nut 12 (0.47) nut G, gRear suspension member standard
hole
20 (0.78)
C, c Rear suspension member standard
hole 20 (0.78)
H, hLower arm installation hole rear 26
y14
(1.02 y0.55)
D, d Lower arm installation hole front 26
yl4
1.02 y0.55 I, i
Upper arm installation hole rear 14 (0.55)
E, e Upper arm installation hole front 14 (0.55)
Suspension Crossmember (Cont'd)
BODY DIMENSIONSDI-12
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Shift Lock ECU
Tilt and Power
Telescopic ECU
Airbag ECU
Cruise Control ECU Engine ECUABS and Traction ECU
(w/ Traction System) or
ABS ECU
(w/o Traction System)
Theft Deterrent and
Door Lock ECU
(w/ Traction System)
Traction ECU
Remote Control Mirror ECU A/C Control Amplifier
PPS ECU
Engine Cooling Fan ECU
Component to be aligned
Section of repair manual
for relevant model year
Front Wheels Suspension and Axle (SA) section
Rear Wheels Suspension and Axle (SA) section
Propeller Shaft Propeller Shaft (PR) section
2. BRAKE SYSTEM
The brake system is one of the most important safety components. Always \
follow the directions and
notes given in section BR of the repair manual for the relevant model ye\
ar when handling brake sys-
tem parts.
NOTICE: When repairing the brake master cylinder or TRAC system, bleed t\
he air out of the TRAC
system.
3. DRIVE TRAIN AND CHASSIS
The drive train and chassis are components that can have great effects on the running performance
and vibration resistance of the vehicle. After installing components in \
the sections listed in the table
below, perform alignments to ensure correct mounting angles and dimensions. P\
articularly accurate
repair of the body must also be done to ensure correct alignment.
HINT: Correct procedures and special tools are required for alignment. Alway\
s follow the directionsgiven in the repair manual for the relevant model year during alignment \
and section DI of this manual.
4. ECU (ELECTRONIC CONTROL UNIT)
Locations of ECUs
INTRODUCTIONIN-8
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N01093
N01094
SUPPORT POSITION PANTOGRAPH JACK POSITION
Front Center of suspension crossmember. . . . . . . .
Rear Jack up support of differential carrier . . . . . . . . .
JACK POSITION
Jack
or Suspension Crossmember
Front
Safety stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VEHICLE LIFT AND SUPPORT LOCATIONS
INTRODUCTIONIN-15
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\
 \

Front suspension crossmember x Engine mounting insulator  59 600 43
\
 \
PS pump x Cylinder head for bolt 39 400 29
\
 \
 for nut 43 440 32
\
 \
Propeller shaft x Transmission  79 805 58\
 \

Propeller shaft x Differential
  
79
 
805
 
58\
 \

Propeller shaft x Body
  
37
 
375
 
27\
 \
Center floor crossmember brace x Body  13 130 9\
 \
Fuel inlet hose x Fuel tube  30 310 22\
 \
TWC (Front) x Exhaust manifold  62 530 46\
 \
Front exhaust pipe x TWC (Front)  43 440 32\
 \
Front exhaust pipe support bracket x Transmission  43 440 32\
 \
Front exhaust pipe x Center Exhaust pipe  43 440 32\
 \
Center exhaust pipe x Tailpipe  44 195 14
\
 \
Main heated oxygen Exhaust manifold  44 450 33
\
 \
Sub heated oxygen sensor x Front exhaust pipe  44 450 33
±
1UZ ± FE ENGINE ENGINE MECHANICALEG±211
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15. DISCONNECT ENGINE WIRE CONNECTORS
16. DISCONNECT THEFT DETERRENT HORN CONNECTOR
17. DISCONNECT GROUND CABLE FROM BODY
18. DIS CO NNE CT PO WE R STE E RING (P S ) SO LE NO IDVALVE CONNECTOR
19. DISCONNECT WIRE CLAMP (FOR GENERATOR) FROM VSV (FOR EVAP)
(a) Remove the 2 bolts, and disconnect the VSV from the RH
cylinder head.
(b) Disconnect the wire clamp from the VSV bracket.
20. REMOVE GENERATOR
(a) Disconnect the generator connector.
(b) Remove the cap and nut, and disconnect the generator wire.
(c) Remove the bolt, and disconnect the transmission oil cooler pipe bracket from the generator.
(d) Remove the nut and generator.
21. DISCONNECT POWER STEERING (PS) TUBES FROM SUSPENSION CROSSMEMBER
Remove the clamp bolt, and disconnect the PS tubes.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±143
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36. DISCONNECT TRANSMISSION CONTROL ROD FROMSHIFT LEVER
Remove the nut, and disconnect the control rod from the shift
lever.
37. REMOVE ENGINE AND TRANSMISSION A SSEMBLY
FROM VEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Remove the 2 nuts holding the engine mounting insulators to
the front suspension crossmember.
(c) Remove the 4 bolts, 4 nuts and rear engine m ounting
member. Disconnect the ground strap.
(d) Lift the engine out of the vehicle slowly and carefully. HINT: Make sure the engine is clear of all wirings, hoses and
cables.
NOTICE: Be careful not hit the PS gear housing, PNP switch
and ABS actuator.
(e) Place the engine and transmission assembly onto the stand.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±149
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ENGINE INSTALLATION
EG2HW±02
(See Components for Engine Removal and Installation)
1. INSTALL ENGINE AND TRANSMISSION ASSEMBLY INVEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Slowly lower the engine and transmission assembly into the engine compartment.
NOTICE: Be careful not to hit the PS gear housing and
PNP switch.
(c) Insert the stud bolts of the front engine mounting brackets into the stud bolt holes of the front suspension crossmember.
(d) Keep the engine level.
(e) Install the rear engine mounting member with the 4 bolts and 4 nuts.
Torque:
25 NVm (250 kgf Vcm, 19 ft Vlbf) for bolt
13 N Vm (135 kgf Vcm, 10 ft Vlbf) for nut
(f) Install the 2 nuts holding the engine mounting brackets to the
front suspension crossmember.
Torque: 59 N Vm (600 kgf Vcm, 43 ft Vlbf)
EG±192±
1UZ±FE ENGINE ENGINE MECHANICAL
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35. DISCONNECT TRANSMISSION CONTROL RODRemove the nut, and disconnect the control rod from the shift
lever.
36. REMOVE ENGINE AND TRANSMISSION A SSEMBLY
FROM VEHICLE
(a) Attach the engine hoist chain to the engine hangers.
(b) Remove the two nuts holding the engine mounting insulators to the front suspension crossmember.
(c) Remove the four bolts, four nuts and rear engine mounting member. Disconnect the ground strap.
(d) Lift the engine out of the vehicle slowly and carefully.
NOTICE: Be careful not to hit the PS gear housing, neu-
tral start switch and ABS actuator.
(e) Make sure the engine is clear of all wiring, hoses and cables.
(f) Place the engine and transmission assembly onto the stand.
EM±128
±
ENGINE MECHANICAL Cylinder Block
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