1990 Subaru Loyale Service and Repair Manual

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Factory-Grade Data

1990 Subaru Loyale 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

  • RS Turbo Coupe 3-Door
  • Base Coupe 3-Door
  • Turbo Wagon 4-Door
  • RS Coupe 3-Door
  • Base Sedan 4-Door
  • Turbo Sedan 4-Door
  • Base Wagon 4-Door

Engines covered

  • 1.8L 1781CC H4 GAS SOHC Turbocharged
  • 1.8L 1781CC 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 Loyale 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 #95V10300624/05/1995Component: SEAT BELTS:FRONT:BUCKLE ASSEMBLY

THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE

Consequence

THE SAFETY BELTS WOULD NOT PROVIDE ADEQUATE PROTECTION TO AN OCCUPANT IN A VEHICLE CRASH.

Remedy

OWNERS SHOULD PROMPTLY CHECK THE CONDITION AND OPERATION OF BOTH FRONT SAFETY BELT BUCKLES AND CAREF

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 #91V09100011/06/1991Component: POWER TRAIN:AUTOMATIC TRANSMISSION

TRANSMISSION SHIFT LINKAGE MAY BE INCORRECTLY ADJUSTED AND WOULD NOT BE ENGAGED IN A FULL PARK POSITION WHEN PLACED IN PARK.

Consequence

IF TRANSMISSION PARK MECHANISM IS NOT IN PARK WHILE THEVEHICLE IS RUNNING OR ON AN INCLINE, A RUNAWA

Remedy

REPAIR THE TRANSMISSION PARK MECHANISM.

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 9 technical service bulletins on file with NHTSA.

20020820Component: TIRES:SIDEWALL

OUT OF THE FOUR NEW TIRES THAT WERE PURCHASED TWO TIRES IN THE REAR BLEWOUT WHILE CONSUMER WAS DRIVING. CONTACTED DEALER AND THEY WERE NOT WILLING TO DO ANYTHING. REPLACEMENT TIRES, 50000 MILES, P175/

20001114Component: TIRES:TREAD/BELT

FIRESTONE TIRE (P185 70 R13) EXPERIENCED TREAD SEPARATION. *SLC

20000407Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

CAR LEAKS OIL ON TAIL PIPE, CAUSING OIL TO BURN AND SMOKE. *AK

19990803Component: POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES

TRANSMISSION LEAKS FLUID/ HORN HAS NO SOUND WHEN IT'S HIT AND RIGHT FRONT TIRE MAKES GRINDING NOISE, LIKE METAL TO METAL. HAD TAKEN TO DEALER AT LEAST 6 TIMES. NOTHING WAS FOUND THAT COULD BE CORRE

19990803Component: TIRES

TRANSMISSION LEAKS FLUID/ HORN HAS NO SOUND WHEN IT'S HIT AND RIGHT FRONT TIRE MAKES GRINDING NOISE, LIKE METAL TO METAL. HAD TAKEN TO DEALER AT LEAST 6 TIMES. NOTHING WAS FOUND THAT COULD BE CORRE

Showing the 5 most serious of 16 complaints filed with NHTSA.

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