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1993 Toyota Corolla (US-Spec): technical information

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Brakes

Model 1993 1992
Master Cylinder Type Tandem -
Diameter mm (in.) 20.64 (0.81)
With ABS: 22.22 (0.87)*
 
Brake Booster Type Single (exc. ABS) Single
Size (in.) 9 (ABS: 7 + 8) 9
Front Brake Type Ventilated Disc -
Pad Area cm2 (in.2) 47.9 (7.42) x 4 43 (6.67) x 4
Wheel Cylinder Dia. mm (in.) 54.0 (2.13) 51.1 (2.01)
Rotor Size (D x T)** mm (in.) 255 x 22
(10.04 x 0.87)
238 x 18
(9.37 x 0.71)
Rear Brake Type Leading-Trailing -
Lining Area cm2 (in.2) 57.6 (8.93) x 4 -
Wheel Cylinder Dia. mm (in.) 17.46 (0.69) -
Drum Inner Dia. mm (in.) 200 (7.87) -
Brake Control Valve Type Dual-P Valve -
Deflection Point of Hydraulic Pressure kPa (kgf/cm2, psi) 2942 (30, 427) 3432 (35, 498)
Pressure Reduction Gradient 0.25 0.37
Parking Brake Type Drum -
Size mm (in.) 200 (7.87) -
Lever Type Center Lever -

ABS (Anti-Lock Brake System)

The ABS controlled the brake fluid pressure applied to the wheel cylinders. That prevented the wheels from locking up during a panic stop. Aside from the 2-position solenoid valve adopted in the ABS actuator, the basic construction and operation of this system are the same as those of the '92 Camry and Celica.

The ABS actuator with four 3-position solenoid valves used in the '92 Camry and Celica was replaced by a new type actuator having eight 2 position solenoid valves in the '93 Corolla. The new ABS actuator was composed of two functionally divided components, namely the control unit and the pressure reduction unit, as in the previous 3 position solenoid valve type actuator. These two units had the same function but the control unit had different solenoid valves as shown below:

The pressure holding valve controlled (opened and closed) the circuit between the brake master cylinder and the wheel cylinder. The brake fluid pressure from the brake master cylinder and the wheel cylinder was turned on and off accordingly.

brake switch

The pressure reduction valve controlled (opened and closed) the circuit between the wheel cylinder and the reservoir. The brake fluid pressure from the wheel cylinder to the reservoir was turned on and off accordingly.

1993 corolla ABS system

Front Suspension

A MacPherson strut type front suspension with an L-shaped lower arm as a strut bar was used, with changes to increase cornering performance and directional stability:

The cross section structure of the lower arm was changed to reduce the unsprung weight. The rear side bushing was now integrated with the bracket, but in the previous model it used to be separate from the bracket. At the same time, the bushing shape was changed to provide more precise steering response when driving straight and during cornering, as well as to improve trace characteristics. A front end bushing with steel inter-ring was used. Its structure was the same as in the previous model.

Rear Suspension

Dual link MacPherson strut type suspension was used at the rear as with previous models. But the following changes were made to increase steering stability and suspension rigidity:

Steering

The rack and pinion steering gear was kept, but the tilt mechanism of the steering column was changed to that of the '92 Camry to further improve the ease of operation. The support of the steering rack housing and the rubber coupling of the intermediate shaft were changed for better feel.

Specifications

Model 1993-97 1992
Steering Type Manual Power Manual Power
Gear Ratio (Overall) 22.7 18.5 24.1 18.7*, 19.1**
Nos. of Turn Lock to Lock 4.09 3.35 4.28 3.27*, 3.35**
Rack Stroke mm (in.) 142 (5.59) 131 (5.16) 140 (5.51) 131 (5.16)

* KOYO SEIKO Product / ** TOYOTA Product

Steering Column

The rubber coupling on the intermediate shaft was changed from the press fit type to the pin type. By fastening the coupling to the No. 1 intermediate shaft with a pin, rigidity was increased. That provided excellent steering stability and cornering response. The pin type couplings also reduces noise transmitted from the power steering system to the steering column.

Body

The body was made more rigid by increasing the rigidity of each pillar joint, optimum reinforcement of the spring support section of the front and rear suspension, increased use of high strength sheet steel, and refinement of the shape and construction of each part. Light weight and highly rigid high strength sheet steel was used for the engine hood, door panels and members.

Optimizing the construction of joints between panels and the location of reinforcements, utilizing continuity of underbody members, increasing the size of the member cross-section and reinforcing the suspension installation parts also increased rigidity. The side member panel was unified, and on doors, reinforcement was added to each joint and a side impact protection beam was used to provide high rigidity.

Use of anti-corrosion sheet was increased and wax and scaler and PVC (Polyvinyl Chloride) coating was applied to the more rust-susceptible parts such as the edges of the door and engine hood, and the underbody to improve rust resistant performance.

Two types of anti-corrosion sheet steel were used: galvannealed steel and zinc iron alloy double layer galvannealed sheet steel. Galvannealed steel was used for many inner panels, engine compartment, etc. Zinc-iron alloy double layer galvannealed sheet steel was used for major outer panels such as the engine hood, doors and luggage compartment door.

Wax or sealer was applied to the hemmed portions of the engine hood, door panels and luggage compartment door to improve rust-resistance. The underbody was coated with PCV to a thickness of 0.5 mm (0.019in.) over the entire area and 1.0 mm (0.039 in.) at panel joints to increase the vehicle's rust-resistance. A chip resistant coat was applied to rocker panels and front and rear wheel arches to protect them from flying stones.

The noise and vibration level was minimized by using vibration damping sheet in more areas, effective arrangement of asphalt sheets, use of a multi-layer composite structure and increased use of foamed polyurethane.

A vibration damping sheet steel consisted of an asphalt sheet sandwiched between two sheet steels in a unitary construction for effective damping of panel vibration and noise.

In all vehicles, the passenger compartment side of the dash panel was fitted with a silencer consisting of a vinyl chloride outer surface with a backing of felt layers to cut out engine noise.

Resin binding asphalt sheets used under the carpet had 3-layered structure. Asphalt sheet was added to sheet steel, then a heat hardened resin layer was added on top for binding. Vibration energy caused the asphalt sheet to stretch, and was thus absorbed. The addition of the resin layer distorted the asphalt sheet. This distortion caused even more vibration energy to be absorbed.

Aerodynamics

To improve aerodynamic performance, flush mounting was used wherever possible, and the following measures were taken:

No. Details Model
Sedan Wagon
1 The low, streamlined engine hood leading edge had low air resistance and front lift. x x
2 The wheel arch design of the fender was changed. The bumper and fender were flush-mounted and well rounded so that the front side corners provide a smooth air flow. x x
3 Flush front pillars and cabin provided smoother wind flow. x x
4 Aerodynamic outside rear view mirrors. x x
5 A rear window and rear pillars that increased aerodynamic performance without sacrificing roominess. x -
6 The high-deck rear compartment door had an aerodynamically advanced rear end. x -
7 The tapered rear fender provided smooth wind flow to the back of the vehicle. x x
8 The flat wheel cap had excellent aerodynamic performance. x -
9 The under shape of the front bumper provided good aerodynamic performance and ingine cooling. x x
10 The front fender liner with good aerodynamics and brake cooling performance was smoothly connected to the bumper. x x
11 The flat bottom of the spare tire case smoothly connects to the rear bumper. x x

To increase aerodynamic performance and reduce air flow resistance, each part was flush-mounted; minimizing the step and gap at the engine hood/body and trunk lid/body areas enhanced the appearance and reduced noise and vibration.

The front door window regulator was changed from the X-arm type to the cable type to provide smoother operation and reduce weight. The rear door still had the singal arm type window regulator.

The front door glass was fitted to the carrier plate, which moves up and down the main guide. The window regulator cables wound around the drum in the motor, with the cable ended fixed at the top and bottom of the drum. The carrier plate was attached to the cables and moved up and down in accordance with the movement of the cables.

When the power window motor or window regulator handle was rotated to the up side, the cable at the top of the drum wound in and the cable at the lower side wound out from the drum an equal extent, causing the carrier plate to rise. When the motor or regulator handle was rotated to the down side, the operation was reversed and the carrier plate was lowered.

Body Electrical

Daytime running lights and an automatic light shutoff system were added; DRLs were only used in Canada.

The speedometer of this Corolla was cableless, electrical analog type, which was already in the Previa and Camry. The odometer was changed to the pulse motor driven type. The basic construction and operation of the speedometer and odometer were the same as in the Previa.

Air Conditioning / Heat

The Corolla had a full air mix type heater and ventilator. The air conditioning was standard equipment on LE grade model for the U.S.A. and optional on all other models for the U.S.A. and models for Canada. The adoption of a three-passage flow type condenser, larger electric fan, and drawn-cup type evaporator in the air conditioning increased its cooling efficiency. The fulcrum of the blower switch was moved further in. This made switch operation smoother, as less effort was required to press the lever.

    Model Performance Specifications
    Heater Heat Output (MJ/h [kcal/h]) 15.07 [3600], 17.58 [4200]*
    Air Flow Volume (m3/h) 320.330* in 1993; 300 in 1992
    Power Consumption (W) 170 in 1993; 160 in 1992
    Air Conditioning Heat Output (MJ/h [kcal/h]) 17.58 [4200] in 1993; 15.07 in 1992
    Air Flow Volume (m3/h) 475
    Power Consumption (W) 200

     

    No. Part Name
    1 Magnetic Clutch Relay
    2 Electric Fan Control Relays
    3 Water Valve
    4 Heater Core
    5 Air Conditioning Amplifier
    6 Evaporator
    7 Blower Resistor
    8 Blower Motor
    9 Triple-Pressure Switch
    10 A/C Idle-Up VSV
    11 Compressor
    12 Electric Fan (Condenser Fan)
    13 Receiver
    14 Condenser

As in the previous models, the three-flow level type heater unit had a pair of air mix control dampers. The heater core was at the center of the heater unit to minimize ventilation resistance.

The evaporator was the same type of drawn cup type evaporator, with high heat exchange efficiency, which was used in the Corolla and other models in the past. A 10PA15 type compressor was used, with the same basic construction and operation were the same as in the previous Corolla. The three-passage flow type condenser had three passages for the refrigerant, resulting in a greater heat exchanging capability. The condenser fan was the blower type. In combination with the radiator fan, the condenser fan speed was controlled in three steps (stop, low and high) according to refrigerant pressure and the engine coolant temperature. The basic construction and operation were the same as in the previous Corolla.

The air conditioning amplifier was mounted on top of the cooling unit. The basic functions of this amplifier were the same as in the previous Corolla.

All functions were the same as in the previous 4A-FE engined Corolla models. When the blower switch and the A/C switch were turned on together, the magnetic clutch relay turned on and activated the compressor. When one of the following conditions was met while the compressor was turned on, the magnetic clutch relay was turned off and stoped the compressor.

  1. The refrigerator pressure was too low or too high and the low or high pressure switch of the dual pressure switch was turned off.
  2. The air temperature immediately after passage through the evaporator was detected by the thermistor to be below 30°C (37.4°F).
  3. "Air conditioning cut" was requested by the ECM* (engine ECU).

When the compressor was operating or was stopped due to a request from the ECM* (engine ECU), an idle-up signal was sent to the ECM (engine ECU).

Airbags

The SRS (Supplemental Restraint System) airbag, together with the seat belt, was designed to help protect the driver. In a collision, the airbag sensors detect the shock and if the front-to-rear shock was greater than a specified value, the airbag stored in the steering wheel pad was inflated instantaneously to help reduce the shock to the driver. The airbag system was controlled by the center airbag sensor assembly. It had a self-diagnosis function. When it detected a system malfunction, it lighted up the airbag warning light on the combination meter to alert the driver. The system components, construction and operation were the same as in the Celica. Major function parts of the airbag are shown below:

Cruise control

This Corolla used the same motor type actuator as that used in the GT-S and All-Trac/4WD grades of the Celica. The basic construction and system operation were the same as in the Celica, but a tap-down/tap-up control was added, and diagnostic codes were modified as shown below:

Code No. Diagnosis
11
  • Motor on throttle open side was energized continuously.
  • Excessive current flowed to motor drive circuit.
12
  • Open circuit in magnetic clutch.
  • Excessive current flowed to magnetic clutch drive circuit.
13
  • Potentiometer output signal was abnormal
  • Open circuit in motor output circuit
21 Vehicle speed signal not sent for 140 msec. or longer.
23 Vehicle speed dropped 16 km/h (10 mph) or more below the set speed during cruising.
32 Short circuit in control switch circuit (to ground).
34 Control switch did not turn off in spite of switching.
41 Malfunction of ECU.

To read the codes, a mechanic would turn the key on, connect terminals Te and E1 of the check connector in the engine compartment, and watch the power indicator light to count the blinks.

The input signal check mode was set by operating the ignition key, control switch and main switch in the order given below:

  1. Turn the ignition key to ON position
  2. Push the control switch to SET/COAST or RESUME/ACCEL and keep it there while turning the main switch ON. Then hold SET/COAST or RESUME/ACCEL position 3 seconds.
  3. Check that the power indicator light blinks twice.

Input Signal Check Function

Major Technical Specifications Table

Item U.S.A.
Body Type 4-Door Sedan
Vehicle Grade STD
Model Code No. AE101L-AEMDKA AE101L-AEHDKA
Major Dimentions
and Vehicle Weights
Overall Length mm (in.) 1 4370 (172.0) ---
Width mm (in.) 2 1685 (66.3) ---
Height mm (in.) 3 1360 (53.5) ---
Wheel base mm (in.) 4 2465 (97.0) ---
Tread Front mm (in.) 5 1460 (57.5) ---
Rear mm (in.) 6 1450 (57.1) ---
Effective Head Room Front mm (in.) 7 985 (38.8) ---
Rear mm (in.) 8 942 (37.1) ---
Effective Leg Room Front mm (in.) 9 1304 (51.3) ---
Rear mm (in.) 10 1378 (54.3) ---
Shoulder Room Front mm (in.) 11 1374 (54.1) ---
Rear mm (in.) 12 1358 (53.5) ---
Overhang Front mm (in.) 13 865 (34.1) ---
Rear mm (in.) 14 1040 (40.9) ---
Min. Running Ground Clearance mm (in.) 15 120 (4.7) ---
Angle of Aproach degrees 16 18 ---
Angle of Departure degrees 17 16 ---
Curb Weight Front kg (lb) 18 625 (1378) 645 (1422)
Rear kg (lb) 19 420 (926) ---
Total kg (lb) 20 1045 (2304) 1065 (2348)
Gross Vehicle Weight Front kg (lb) 21 830 (1830) ---
Rear kg (lb) 22 755 (1664) ---
Total kg (lb) 23 1585 (3494) ---
Fuel Tank Capacity l (U.S.gal, lmp.gal) 24 50 (13.2, 11.0) ---
Luggage Compartment Capacity m3 (cu.ft.) 25 0.359 (12.6) ---
Performance Max. Speed km/h (mph) 26 180 (111) 175 (108)
Max. Cruising Speed km/h (mph) 27 165 (102) 160 (99)
Acceleration 0 to 100 km/h sec. 28 10.4 12.3
0 to 400 m sec. 29 17.6 19.2
Max. Permissible Speed 1st Gear km/h (mph) 30 46 (28) 65 (40)
2nd Gear km/h (mph) 31 86 (53) 118 (73)
3rd Gear km/h (mph) 32 125 (77) ---
4th Gear km/h (mph) 33 --- ---
Turning Diameter (Outside Front) Wall to Wall m (ft.) 34 5.2 (17.0) ---
Curb to Curb m (ft.) 35 4.9 (16.0) ---
Engine Engine Type 36 4A-FE ---
Valve Mechanism 37 16-valve DOHC ---
Bore x Stroke mm (in.) 38 81.0 x 77.0 (3.19 x 3.03) ---
Displacement cm3 (cu.in.) 39 1587 (96.8) ---
Compression Ratio 40 9.5 : 1 ---
Carburetor Type 41 MFI (EFI) ---
Research Octane No. RON 42 91 ---
Max. Output (SAE-NET) kW/rpm (HP@rpm) 43 78/5800 (105@5800), 78/5800 (100@5800)* ---
Max. Torque (SAE-NET) N-m/rpm (lb-ft@rpm) 44 136/4800 (100@4800) ---
Engine Electrical Battery Capacity (5HR) Voltage & Amp. hr. 45 12 - 40, 12 - 48** ---
Generator (Alternator) Output Watts 46 840 ---
Starter Output kW 47 1.0, 1.4** ---
Chassis Clutch Type 48 Dry, Single Plate ---
Transmission Type 49 C50 A131L
Transmission Gear Rate In First 50 3.545 2.810
In Second 51 1.904 1.549
In Third 52 1.310 1.000
In Fourth 53 0.969 ---
In Fifth 54 0.815 ---
In Reverse 55 3.250 2.296
Counter Gear Ratio 56 --- 0.945
Differential Gear Ratio (Final) 57 3.722 3.526, 3.722**
Brake Type Front 58 Ventilated Disc ---
Rear 59 L.T. Drum ---
Parking Brake Type 60 L.T. Drum ---
Brake Booster Type and Size in. 61 Single, 9", Tandem, 7"+8"*** ---
Proportioning Valve Type 62 Dual-P Valve ---
Suspension Type Front 63 MacPherson Strut ---
Rear 64 MacPherson Strut ---
Stabilizer Bar Front 65 --- ---
Rear 66 STD ---
Steering Gear Type 67 Rack & Pinion ---
Steering Gear Ratio (Overall) 68 22.7, 18.5** ---
Power Steering Type 69 Integral Type ---

* Only for California specification vehicle.

** Option.

*** With ABS.

**** With Sun Roof.

Also see our drivetrain section featuring transmissions, axles, and driveshafts! and the engine section (at Toyoland)!



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