1991 Acura Legend Service Manual PDF

The 1991 Acura Legend Service Manual provides comprehensive technical information for maintenance, repair, and servicing of the 1991 Acura Legend luxury sedan. This manual covers engine specifications, transmission systems, electrical systems, suspension, brakes, steering, and all major components. Below are key sections for specifications, maintenance procedures, troubleshooting, and technical data.

1. Vehicle Specifications 2. Engine Systems 3. Transmission & Drivetrain 4. Electrical Systems 5. Suspension & Steering 6. Brake Systems 7. Maintenance Schedules 8. Diagnostic Procedures 9. Repair Instructions 10. Technical Bulletins 11. Troubleshooting Guide

Vehicle Specifications

Complete technical specifications for the 1991 Acura Legend including engine, transmission, dimensions, and capacities.

Specification	Details
Engine Type	2.7L V6 SOHC 24-valve
Horsepower	160 hp @ 5800 rpm
Torque	162 lb-ft @ 5000 rpm
Transmission	4-speed automatic / 5-speed manual
Fuel System	Multi-port fuel injection
Fuel Capacity	18.0 gallons
Curb Weight	3285 lbs (sedan)
Wheelbase	108.7 inches
Overall Length	189.4 inches
Brake System	Front disc / rear disc with ABS

Engine Systems

Detailed service procedures for the 2.7L V6 engine including timing belt replacement, valve adjustment, and fuel system maintenance.

Timing belt replacement: Every 90,000 miles or 7 years
Valve clearance adjustment: Every 30,000 miles
Spark plug replacement: NGK BKR6E-11, gap 0.039-0.043 in
Fuel filter replacement: Every 30,000 miles
Cooling system service: 50/50 coolant mixture, 9.5 quarts capacity

WARNING! Always disconnect battery before performing engine service. Use proper safety equipment.

Transmission & Drivetrain

Service procedures for automatic and manual transmission systems, differential, and drive axle maintenance.

Automatic transmission fluid: Honda ATF, 2.9 quarts capacity
Manual transmission fluid: Honda MTF, 2.2 quarts capacity
Differential fluid: 80W-90 gear oil, 1.4 quarts
Drive axle inspection: Check for boot damage and joint wear
Shift linkage adjustment: Proper cable tension for smooth operation

CAUTION! Use only specified transmission fluids to prevent damage.

Electrical Systems

Battery: 12V 60Ah, maintenance-free type
Alternator: 80 amp output, belt tension 0.35-0.43 in deflection
Starter: 1.4 kW reduction gear type
Fuse Box: Main fuse 100A, under-hood and interior fuse panels
Wiring Diagrams: Complete schematics for all circuits
Lighting Systems: Headlight, taillight, and interior lighting specifications
Instrument Cluster: Speedometer, tachometer, and warning lights
Power Accessories: Windows, locks, and seat controls

Suspension & Steering

Service procedures for front and rear suspension components, wheel alignment, and power steering system.

Front Suspension: Double wishbone with coil springs, stabilizer bar

Rear Suspension: Double wishbone with coil springs

Wheel Alignment Specifications:

Camber: Front -0°30' ± 45', Rear -1°00' ± 45'
Caster: 2°45' ± 45'
Toe: Front 0 ± 2mm, Rear 2 ± 2mm

Power Steering: Honda Power Steering Fluid, check for leaks at pump and rack

Brake Systems

Complete brake system service including disc brakes, ABS system, and parking brake adjustment.

Front brake pads: Minimum thickness 1.0 mm
Rear brake pads: Minimum thickness 1.0 mm
Rotor thickness: Front 22.0 mm minimum, Rear 8.0 mm minimum
Brake fluid: DOT 3 or DOT 4, replace every 2 years
ABS system: Diagnostic connector under dashboard

Tip: Always bleed brakes starting from wheel farthest from master cylinder.

Maintenance Schedules

Recommended service intervals for normal and severe driving conditions.

Oil and filter change: Every 7,500 miles or 12 months
Air filter replacement: Every 30,000 miles
Timing belt: Every 90,000 miles or 7 years
Spark plugs: Every 30,000 miles
Coolant replacement: Every 36 months
Brake fluid: Every 24 months
Transmission fluid: Every 30,000 miles (automatic)
Fuel filter: Every 30,000 miles

WARNING! Severe service conditions require more frequent maintenance.

Diagnostic Procedures

Troubleshooting guides and diagnostic procedures for engine performance, electrical issues, and system malfunctions.

Repair Instructions

Step-by-step repair procedures for major components including engine removal, transmission replacement, and suspension overhaul.

CAUTION! Always use proper lifting equipment and safety stands when working under vehicle.

Technical Bulletins

Factory service bulletins addressing common issues, updates, and improvements for the 1991 Acura Legend.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Engine won't start	Battery, starter, fuel pump	Check battery voltage, listen for fuel pump, test starter operation
Poor acceleration	Fuel filter, air filter, sensors	Replace fuel and air filters, check TPS and MAP sensors
Transmission slipping	Low fluid, worn clutches	Check fluid level and condition, test line pressure
Brake pulsation	Warped rotors	Measure rotor runout, resurface or replace rotors
Electrical issues	Ground connections, fuses	Check main grounds, test all fuses and relays

Reset Procedures: ECU reset by disconnecting battery for 10 minutes

Technical Support: Acura dealer service department for complex diagnostics