🏷️ Basic Information

Make:

Citroën

Model:

Ax

Year:

1991

Market Segment:

Supermini / City Car

👋 Introduction

Positioning Statement:

The Citroën Ax 1991 Repair Service Manual provides essential, factory-level information for owners and technicians aiming to maintain, diagnose, and repair the popular French supermini.

Comparison To Alternatives:

Offers equivalent detail to original factory service manuals, surpassing basic owner's manuals and offering a more accessible format than physical workshop manuals.

Feature 1:

Step-by-step repair procedures for all major vehicle systems.

Feature 2:

Critical specifications, including torque values, clearances, and tolerances.

Feature 3:

Illustrations, diagrams, and pictures to aid in comprehension and execution of repairs.

Feature 4:

Diagnostic information and troubleshooting guides.

📋 Manual Details

Coverage Focus:

Comprehensive repair and service

Target Audience:

Professional technicians and experienced DIY mechanics

Estimated Page Count:

N/A (Digital PDF)

Type:

Service and Repair Manual

Language:

English

Format:

PDF Download

Accessibility:

Instant Download

📖 Manual Coverage

Engine Mechanical:

Full engine overhaul, tuning, troubleshooting, cylinder head, block, pistons, crankshaft, camshafts

Engine Electrical:

Ignition system, starting system, charging system, ECU (Engine Control Unit) and sensor diagnostics

Fuel System:

Carburetor (likely Weber/Solex for this era) or early fuel injection systems, fuel pump, lines, filters

Transmission:

Manual transmission (gearbox) overhaul, clutch replacement, shifting mechanisms

Drivetrain:

Front-wheel drive system, drive shafts, CV joints

Suspension:

Front suspension (e.g., MacPherson struts), rear suspension, shock absorbers, springs, control arms

Steering:

Steering rack, column, tie rods, power steering (if equipped)

Braking System:

Front and rear brakes (likely discs front, drums rear), hydraulic system, brake lines, calipers, wheel cylinders

Electrical System:

Wiring diagrams, lighting, dashboard instrumentation, fuses, relays, switches, battery

Body And Chassis:

Body panel repair, door mechanisms, glass, trim, chassis components

Heating And Ventilation:

HVAC system components, controls, ducting

Interior:

Seat removal, dashboard disassembly, interior trim

Maintenance:

Scheduled maintenance, fluid changes, filter replacements, inspections

Repair:

Step-by-step repair procedures for all major systems

Disassembly Assembly:

Detailed instructions for component removal and reinstallation

Troubleshooting:

Diagnostic flowcharts and common issue resolution

Cleaning:

Component cleaning instructions

Depth:

Comprehensive, covering from basic maintenance to in-depth mechanical and electrical repairs

Diagnostic Capability:

Advanced diagnostics for engine management and electrical systems

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text within PDF

Printability:

Full Printable

Zoom Capability:

Zoom IN/OUT enabled

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

Software Requirements:

Adobe PDF Reader, WinZip (or equivalent unarchiver)

Compatibility:

All Versions of Windows & Mac

⚙️ Engine Specifications

Engine Code Typical:

TU1 (e.g., TU1.3, TU1.4) series

Engine Type:

Inline 4-cylinder, SOHC (Single Overhead Camshaft)

Displacement Liters:

1.1L (approx. 1124cc), 1.3L (approx. 1360cc)

Bore X Stroke Mm:

Varies by specific engine code (e.g., TU1.3: 75.0 x 77.0 mm)

Compression Ratio:

Typically 9.0:1 to 9.7:1 (varies by variant)

Horsepower Ps Approx:

60-70 PS (approx. 59-69 bhp) for 1.3L, 50-60 PS for 1.1L

Torque Nm Approx:

85-95 Nm (approx. 63-70 lb-ft) for 1.3L

Fuel Delivery Type:

Single-point or multi-point electronic fuel injection (EFI) on later models, or Weber/Solex downdraft carburetors on earlier/base models.

Fuel Type:

Unleaded Gasoline (RON 95 or higher)

Ignition Type:

Electronic ignition (distributorless or with distributor, depending on engine variant)

🔧 Transmission

Type:

5-speed Manual Transaxle

Type:

3-speed Automatic (less common)

Clutch Type:

Single dry plate, hydraulically operated

Gear Ratios:

Specific ratios available within manual for various models/engines

Manual Transmission Fluid:

API GL-4, SAE 75W-90 or 80W-90 gear oil (refer to manual for exact spec)

📐 Dimensions

Length Mm:

3636 mm

Width Mm:

1596 mm

Height Mm:

1325 mm

Wheelbase Mm:

2343 mm

Curb Weight Kg Approx:

700 - 850 kg (depending on engine and equipment)

Gross Vehicle Weight Kg Approx:

1200 - 1300 kg

🛡️ Safety Features

Euro Ncap Rating:

N/A (Pre-dates formal Euro NCAP testing for this vehicle class)

Active Safety Features:

Front disc brakes, rear drum brakes, collapsible steering column

Passive Safety Features:

Seat belts (front, rear depending on market), reinforced passenger safety cell

💡 Technology Features

Infotainment Features:

Basic radio/cassette player (optional on some trims), analogue gauges.

Driver Assistance Features:

Limited; primarily focused on mechanical operation rather than electronic aids.

Connectivity Options:

None in the modern sense; basic wiring for radio antenna.

🔧 Maintenance

Oil Change Interval Km Miles:

Typically 10,000 - 15,000 km (6,000 - 9,000 miles) or 12 months

Air Filter Replacement Interval Km:

20,000 - 30,000 km

Spark Plug Replacement Interval Km:

30,000 - 40,000 km (depending on plug type)

Engine Oil Type:

API SF/SG or higher, SAE 10W-40 or 5W-40 (check manual for specific viscosity recommendation based on climate)

Coolant Type:

Ethylene glycol based, long-life antifreeze/coolant (typically pink or blue, 50/50 mix with distilled water)

Brake Fluid Type:

DOT 3 or DOT 4

Common Issue 1:

Carburetor issues (wear, adjustment, blockages) on carbureted models.

Common Issue 2:

Corrosion, particularly in wheel arches, sills, and around the rear axle mounts.

Common Issue 3:

Electrical gremlins, often related to aging wiring or earth points.

Common Issue 4:

Wear on suspension bushings and ball joints, leading to knocking or poor handling.

Common Issue 5:

Clutch wear and hydraulic cylinder leaks.

📚 Vehicle History

Citroen Philosophy:

Citroën is known for innovative engineering, aerodynamic design, and a focus on comfort and practicality, particularly in its smaller segment vehicles.

Ax Development:

The Ax was designed as a successor to the Citroën Visa and Citroën C15, intended to be lightweight, fuel-efficient, and economical to run. It featured a distinctive wedge-shaped profile and a large glass area.

Production Years:

1986-1998

Manufacturing Location:

Primarily France (Aulnay-sous-Bois plant)

Sales Impact:

The Ax was a significant volume seller for Citroën in Europe throughout the late 1980s and 1990s, competing with models like the Peugeot 205, Renault Clio, and Ford Fiesta.

🏆 Awards & Recognition

Model Accolades:

While specific 'awards' for the 1991 model may not be widely documented, the Ax line itself was recognized for its innovative lightweight design and fuel efficiency in its class during its production run.