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1990 Subaru XT CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Subaru REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service

A/C & HEATER SERVICE PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
A/C & Cooling System Maintenance -> Subaru -> 1990-2002
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
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BRAKE SERVICE PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
SUBARU, HYDRAULIC BRAKE SYSTEMS -> DUAL PROPORTIONING VALVE REPLACEMENT
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
Inspect brake line connections at DPV for fluid leakage. If leakage is found tighten lines or replace DPV.
- Disconnect brake line flare nuts at all six connections from DPV.
- Remove retaining ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
Subaru -> Fuel Filter Replacement -> Except Justy w/Carbureted Engine -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
Fuel System Pressure Relief
- On Impreza, SVX, 1990-94 Legacy models,fold down the rear seat back, then remove the floor mat and access hole lid.
- On 1995-00 Legacy models, remove the rear seat cushion and seat back, then the floor mat and access hole lid.
- On all models, disconnect the fuel pump relay electrical connector.
- Start the engine and operate until it stalls.
- After the engine has stalled, crank the engine for at least 5 seconds.
- Place the ignition switch in Off position.
- Disconnect the battery ground cable.
- Connect the fuel pump electrical connector.
- On...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Installation -> Removal
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
Removal
- Put matching marks on affected parts.
- Remove bolts which hold front propeller shaft to rear propeller shaft.
- Place companion flange in a vise and remove stake nut. Be sure not to hold propeller shaft pipe portion in vise.
- Drive out companion flange with a puller or press. Before disassembling, put matching mark on affected parts.
- Lightly tap head of front propeller shaft with a copper hammer un...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
Alternator, Replace
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
- Disconnect ground cable from battery.
- Disconnect connector and terminal from alternator.
- Remove V-belt covers.
- Remove V-belts.
- Remove bolts which ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
Subaru -> Air Bag Warning Lamp ->
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
The air bag warning lamp, located inside the combination meter, will illuminate in the event of a poor connection or other air bag system fault. When the air bag system is functioning properly, the lamp should go out approximately 8 seconds after the ignition switch ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
Lower
- Disconnect ground cable from battery.
- Drain engine coolant completely into a suitable container.
- Disconnect radiator outlet hose from water pump.
- Disconnect radiator outlet hose from radiator.
- Remove outlet house from vehicle.
- Reverse procedure ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1990 Subaru XT AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1990 Subaru XT GL 1.8 H4 GAS
- Loosen alternator lock nut.
- Loosen alt...
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COMPONENT LOCATION DIAGRAMS FOR 1990 Subaru XT AUTOMOBILES
Component location diagrams for most 1990 Subaru XT cars and light trucks sold in the U.S. from 1990+.
![]() Components on diagram: |
![]() Components on diagram: |
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WIRING DIAGRAMS FOR 1990 Subaru XT AUTOMOBILES
OEM drawn wiring diagrams for most 1990 Subaru XT cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1990 Subaru XT AUTOMOBILES
OEM TSB listings for most 1990 Subaru XT cars and light trucks sold in the U.S. from 1985+.
Document: REMANUFACTURED TRANSAXLES PROGRAM - REVISED Vehicle: 1990 Subaru XT GL 1.8 H4 GAS Auto Systems: |
Document: RECOMMENDED MATERIALS Vehicle: 1990 Subaru XT GL 1.8 H4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1990 Subaru XT AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 Subaru XT 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 1990 Subaru XT 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 1990 Subaru XT 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 1990 Subaru XT 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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