2015-2018 Ford Focus RS Service and Repair Manual

This 2015-2018 Ford Focus RS Service and Repair Manual Covers

Engine and Drivetrain

• 2.3L EcoBoost Turbocharged 4-cylinder high-performance engine mechanical overhauls, cylinder head specifications, and revised head gasket updates
• Twin-scroll turbocharger assemblies, electronic wastegate actuators, intercooler setups, and boost control solenoids
• High-pressure direct fuel injection systems, fuel rail pressure diagnostics, and dual-independent variable camshaft timing (Ti-VCT) systems
• Large-capacity radiator loops, performance water pumps, electronic thermostat behaviors, and auxiliary cooling circuits
• Active valve performance exhaust systems, catalytic converters, and heated oxygen sensor (HO2S) tracking loops
• MMT6 6-speed high-torque manual transmission overhauls, internal gear sets, and reverse lock-out adjustments
• High-performance dual-mass clutches, hydraulic slave cylinders, and shifter cable linkage alignments
• Ford Performance All-Wheel Drive (AWD) system overhauls, Rear Drive Unit (RDU) multi-plate clutch packs, and torque vectoring modules
• Front-wheel-drive and rear-wheel-drive heavy-duty CV axle shaft installations, boot repairs, and Power Transfer Unit (PTU) fluids

Chassis and Suspension

• Independent front MacPherson struts, unique RS knuckles, track-tuned coil springs, and electronic two-mode adjustable dampers
• Independent SLA multi-link rear suspension assemblies, control arms, and reinforced rear subframe mountings
• Electric Power-Assisted Steering (EPAS) rack and pinion mechanical steps, torque-steer compensation calibrations, and active return loops
• Wheel alignment factory tracking specifications, high-performance camber checking, caster adjustments, and toe limits
• Front and rear heavy-duty wheel bearing hub assembly press replacement setups

Braking Systems

• ABS hydraulic control unit modulator valve blocks, wheel speed sensors, and active performance module configurations
• Traction Control System (TCS), Electronic Stability Control (ESC), and selectable RS Drive Mode (Normal, Sport, Track, Drift) module coding
• Brake master cylinder overhauls, vacuum power booster tests, and specific line fluid bleeding sequences for performance brake setups
• Mechanical handbrake cable tension setups, center console levers, and rear caliper integrated mechanical mechanisms
• Upgraded Brembo 4-piston aluminum front calipers, large ventilated/ventilated front brake disc rotors, and rear slider pin cleanings

Electrical and Wiring

• Complete factory electrical wiring schematics, chassis grounding connection paths, and high-density harness pinouts
• SmartShield electronic engine immobilizer and Keyless Vehicle anti-theft push-button ignition programming
• Engine bay high-current fuse boxes, passenger compartment BCM fuse grids, and performance power distribution mapping
• Body Control Module (BCM) configuration adaptations, central locking actuators, and power window motor relays
• SYNC 2 and SYNC 3 touchscreen infotainment architectures, navigation loops, multi-wiring circuits, and backup camera tracks
• Track-focused triple dashboard auxiliary gauge clusters (boost pressure, oil temperature, oil pressure) wiring and senders

Air Conditioning and HVAC

• Dual-zone Electronic Automatic Temperature Control (EATC) logic system diagnostics and blend door servo motor adjustments
• HVAC air blend door actuator replacements, air distribution flaps, and cabin air duct temperature sensor circuits
• R134a refrigerant capacities, compressor clutch tracking, variable displacement setups, and high-low system pressure charts
• Heater core swap workflows, cabin micro-filter replacement intervals, and multi-speed blower motor resistors

Body and Interior

• Interior door trim panel removal steps, center console assemblies, and headliner card installations
• Recaro sport bucket shell seat track slide adjustments, side airbag harnesses, and leather/alcantara seat cover replacement paths
• Bonnet latch cable routing, rear spoiler mounting points, hatchback tailgate hinge alignment margins, and weatherstrips
• Aggressive RS front fascia bumper structures, rear diffuser elements, side skirt extensions, and high-intensity discharge (HID) adaptive headlights
• Supplemental Restraint System (SRS) clocksprings, dual-stage front airbags, side curtain airbags, and pyrotechnic seatbelt pretensioners

Diagnostics and Troubleshooting

• Ford Integrated Diagnostic System (IDS) and Ford Diagnosis and Repair System (FDRS) software scan tool pinpoint test maps
• OBD2 diagnostic data link connector pin allocations, high-speed CAN networks, and real-time live parameter ID (PID) data logging
• Fuel rail pressure mechanical testing, engine cylinder compression baselines, and smoke-tested vacuum leak detection
• Systematic engine crank but no-start troubleshooting logic trees

Common Error Codes Covered

This manual provides diagnostic and repair procedures for thousands of Ford-specific fault codes, including:

Engine Codes

• P0300 – P0304: Random or Individual Cylinder Misfires Detected (EcoBoost ignition coil and direct injector tracking logs)
• P0234: Engine Overboost Condition (Turbocharger wastegate control actuator troubleshooting)
• P0087: Fuel Rail / System Pressure – Too Low (High-pressure fuel pump tracking parameters)
• P0113: Intake Air Temperature Sensor 1 Circuit High Input
• P0171: System Too Lean Bank 1

Transmission and AWD Codes

• P188A: AWD Oil Temperature Sensor Sensor Circuit Out of Range (RDU multi-plate clutch overheating logs)
• P188B: AWD Control Module General Electrical Failure
• P0704: Clutch Pedal Switch Input Circuit Malfunction

ABS and Chassis Codes

• C0031 / C0034: Left Front / Right Front Wheel Speed Sensor Sensor Circuit Faults
• C0051: Steering Wheel Angle Sensor Circuit Malfunction (ESC/Drive mode calibration requirements)
• C1A00: Control Module General Electrical Failure

Network Communication Codes

• U0100: Lost Communication With Powertrain Control Module (PCM)
• U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module
• U0415: Invalid Data Received From Anti-Lock Brake System (ABS) Control Module

Body Control Codes

• B10A2: Crash Input Circuit Malfunction (SRS safety deployment and fuel cutoff reset maps)
• B1108: Driver Door Central Locking Actuator Malfunction

And thousands of additional diagnostic codes, test procedures, wiring diagrams, and repair instructions.

• Professional automotive workshops
• Independent repair garages
• Mobile mechanics
• Automotive technicians
• Vehicle owners performing DIY repairs
• Automotive training institutions