1990 Subaru Legacy Service and Repair Manual

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Factory-Grade Data

1990 Subaru Legacy service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Base Sedan 4-Door
  • L Sedan 4-Door
  • L Wagon 4-Door
  • Base Wagon 4-Door
  • LS Sedan 4-Door
  • LS Wagon 4-Door

Engines covered

  • 2.2L 2212CC H4 GAS SOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

1990 Subaru Legacy Recalls & Complaints

NHTSA #91V08200030/05/1991Component: POWER TRAIN:AUTOMATIC TRANSMISSION

UNDER CERTAIN LOAD CONDITIONS, THE PARK GEAR MAY NOT DISENGAGE IMMEDIATELY WHEN THE TRANSMISSION LEVER IS MOVED FROM PARK TO REVERSE.

Consequence

DELAYED RELEASE OF TRANSMISSION FROM PARK CAUSES DELAYEDAND POSSIBLY ABRUPT VEHICLE MOVEMENT THAT CO

Remedy

INSTALL A MODIFIED PARKING BRAKE PAWL TO PREVENT DELAYED RELEASE INTO REVERSE GEAR.

NHTSA #94V05200023/03/1994Component: POWER TRAIN:MANUAL TRANSMISSION

WHEN THE VEHICLE IS DRIVEN CONTINUOUSLY UNDER EXTREMELY COLD TEMPERATURES (-22 DEGREES F.) AND HIGH HUMIDITY WEATHER CONDITIONS, THE TRANSMISSION BREATHING (AIR) VENT CAN BE BLOCKED DUE TO MOISTURE FR

Consequence

SUDDEN STOPS WITHOUT PRIOR WARNING CAN CAUSE VEHICLE OCCUPANTS TO BE THROWN AROUND THE VEHICLE AND C

Remedy

DEALERS WILL MODIFY THE OIL GAUGE PIPE AND MODIFY THE OIL LEVEL GAUGE (DIPSTICK) OR REPLACE IT, DEPE

NHTSA #90V18400016/10/1990Component: LATCHES/LOCKS/LINKAGES:DOORS:LATCH

TORQUE OF LATCH SCREWS ON FRONT DOORS MAY LOOSEN OVER TIME DUE TO A GAP BETWEEN THE LATCH BASE PLATE AND INNER DOOR PANEL UNDER THE SCREW HEAD.

Consequence

THE AFFECTED DOOR MAY NOT BE OPENED FROM INSIDE,PREVENTING EXIT FROM THAT DOOR.

Remedy

REPLACE FRONT DOOR LATCH SCREWS WITH "LOCK-TIGHT" SCREWS.

NHTSA #90V11000004/06/1990Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

THE DEFROSTER LEVER PIN OF THE DEFROSTER SHUTTER DOOR MAY BECOME DISLOCATED AND ALLOW THE SHUTTER TO CLOSE, PREVENTING DEFROSTER FROM FUNCTIONING.

Consequence

NON-FUNCTIONING DEFROSTER WOULD ADVERSELY AFFECT DRIVERVISIBILITY.

Remedy

INSTALL A POSITIONING STOPPER DEVICE TO PREVENT DISLOCATION OF DEFROSTER LEVER PIN TO ASSURE DEFROST

TSB #10219491

This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.

TSB #10219492

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.

TSB #10209915

This bulletin has been developed to outline the steps for gathering basic essential information during diagnosis and repair of the Infotainment concerns. (Applicable to all models with Harman or Denso CP1 Infotainment).

TSB #10198758

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models

TSB #10198749

This bulletin is to advise of SOAs revised catalytic converter recycling program shipping procedure.

TSB #10187315

To help reduce confusion and increase technician efficiency, Subaru of America, Inc. (SOA) has developed the following cross reference list to help locate the appropriate Special Service Tool.

TSB #10179378

Special Service Tools Cross Reference List.

TSB #10174543

All Models (Vehicle Cleaning- COVID-19Best Practices)

Showing the 8 most recent of 14 technical service bulletins on file with NHTSA.

19960503Component: SEATS:FRONT ASSEMBLY:RECLINERCrash reported1 injured

CONSUMER INVOLVED IN A REAR-END COLLISION AND THE DRIVER SIDE SEAT RECLINED TO THE BACK OF THE VEHICLE. *AK

19950914Component: VEHICLE SPEED CONTROL:ACCELERATOR PEDALCrash reported1 injured

ACCELERATOR STUCK, CAUSING ACCIDENT/INJURY. *SD

19950907Component: SEAT BELTS:FRONT:RETRACTORCrash reported1 injured

DRIVERS SIDE SEAT BELT DID NOT RETRACT DURING VEHICLE IMPACT. TT

19960213Component: POWER TRAIN:AUTOMATIC TRANSMISSIONCrash reported

TRANSMISSION FAILED TO GO INTO REVERSE FROM PARK, CAUSING ACCIDENT. *DSH

19971030Component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLYFire reported

WHILE DRIVING VEHICLE DRIVER NOTICED SMOKE COMING FROM BACK OF VEHICLE. WHEN PULLING OVER THERE WAS A FIRE, WHICH LOOKED TO HAVE STARTED BETWEEN THE REAR WHEELS. THE FIRE WAS PUT OUT BY OWNER. NOT SU

Showing the 5 most serious of 103 complaints filed with NHTSA.

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