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1991 Toyota MR2 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Toyota REPAIR SHOPS DON'T WANT YOU TO KNOW
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- A/C & Heater Service
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- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Toyota MR2 car and truck
repair procedures including Toyota engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Toyota MR2 automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Toyota -> Automatic Temperature Control System Diagnosis & Testing -> DESCRIPTION
Vehicle: 1991 Toyota MR2 2.0 L4 GAS
The Automatic Temperature Control (ATC) system provides automatic control of A/C compressor operation, air inlet door position, water valve operation and blower speeds in order to maintain passenger compartment temperature within the range selected by the operator.
The system control circuit consists of a feedback potentiometer, temperature control rheostat, and ambient and in-car temperature sensors, Figs. through which are con...
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BRAKE SERVICE PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
TOYOTA, POWER BRAKE UNITS -> BRAKE BOOSTER OVERHAUL
Vehicle: 1991 Toyota MR2 2.2 L4 GAS
The brake booster on these models ca...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Toyota -> Fuel Filter Replacement -> 1980-99 Celica & MR2 -> Fuel System Pressure Relief -> Models Less Union Bolt Fuel Line Connection -> Models w/Union Bolt Fuel Line Connection -> Removal & Installation
Vehicle: 1991 Toyota MR2 2.0 L4 GAS
Fuel System Pressure Relief
Models w/Union Bolt Fuel Line Connection
- Obtain the vehicle owners radio theft protection code prior to disconnecting the battery ground cable, if equipped.
- Disconnect the battery ground cable.
- Remove the fuel fill cap to release fuel tank pressure.
- Place a shop towel over the union bolt at top of fuel filter. Slowly loosen the union bolt allowing fuel pressure to bleed down.
- Whenever the union bolt is loosened to relieve fuel system pressure, always replace the bolt gasket.
Models Less Union Bolt Fuel Line Connection
- Obtain the vehicle owners radio thef...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 1991 Toyota MR2 2.2 L4 GAS
The hub bearing may be damaged if it is subjected to vehicle weight, such as when moving vehicle with driveshaft removed. Therefore, if it is absolutely necessary to place vehicle weight on hub bearing, first support it with hub support tool No. 09608-16041, or equivalent.
- Raise and support vehicle.
- Remove engine undercovers, then drain transaxle oil.
- Remove cotter pin from axle shaft, then locknut cap.
- With emergency brake applied, remove axle shaft nut.
- With brake applied, remove six rear driveshaft to transaxle side gear shaft attaching nuts, then raise and support rear of ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Starter, Replace
Vehicle: 1991 Toyota MR2 2.0 L4 GAS
- Disconnect battery ground cable from negative terminal of battery. Turn ignition switch to LOCK. Wait at least 20 seconds before proceeding with work.
- Remove lefthand engine hood side panel.
- Remove air cleaner.
- Remove terminal cover.
- Remove nu...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Toyota -> Automatic Transmission Overdrive Lamp ->
Vehicle: 1991 Toyota MR2 2.2 L4 GAS
The "OD Off" lamp will be illuminated when the ignition switch is in the On position and the Overdrive (OD) switch is in the Off position. When the OD switch is placed in the On position, the "OD Off" lamp should go out. If the lamp flashes when the switch is placed in the On position, a fault has been detected by the electronic control system. After diagnosis and repair are c...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Heater Hose, Replace -> Bypass -> Inlet -> Outlet
Vehicle: 1991 Toyota MR2 2.2 L4 GAS
Inlet
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at heater core.
- Remove hose from heater core.
- Reposition hose clamp at water outlet.
- Remove hose from water outlet.
- Remove hose from vehicle.
- Reverse procedure to install.
Outlet
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at heat...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Toyota MR2 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Toyota MR2 2.0 L4 GAS
- Loosen pivot bolt and adjusting lock nut on alternator.
- Loosen dri...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Toyota MR2 AUTOMOBILES
Component location diagrams for most 1991 Toyota MR2 cars and light trucks sold in the U.S. from 1990+.
 Shift Lock System Components Diagram for 1991 Toyota MR2 2.0 L4 GASComponents on diagram: |
 Engine Compartment Electronic Control Unit & Relays Diagram for 1991 Toyota MR2 2.2 L4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Toyota MR2 AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Toyota MR2 cars and light trucks sold in the U.S.
 1991 Toyota MR2 2.0 L4 GAS Wiring DiagramComponents on diagram: |
 1991 Toyota MR2 2.2 L4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Toyota MR2 AUTOMOBILES
OEM TSB listings for most 1991 Toyota MR2 cars and light trucks sold in the U.S. from 1985+.
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Document: REPLACEMENT CERTIFICATION LABELS - REVISED Vehicle: 1991 Toyota MR2 2.2 L4 GAS Auto Systems: |
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Document: PERMANENT-TYPE PROTECTIVE WAX COATINGS Vehicle: 1991 Toyota MR2 2.2 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Toyota MR2 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Toyota MR2 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1991 Toyota MR2 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1991 Toyota MR2 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1991 Toyota MR2 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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