Honda Civic EP3 Si SiR Full Workshop Manual 2002 & 2003 — 1,182-Page K20A3 VTEC Service Guide PDF

Description

The Most Complete Reference Available for the 2002–2003 Honda Civic EP3

At 1,182 pages, this is the first-edition workshop manual produced by Honda Motor Co., Ltd. for the EP3-generation Civic — the 2-door 5-speed hatchback sold as the Si in the United States and the SiR in Canada. It covers both model years (2002 and 2003) across 23 fully indexed sections, and specifications apply to U.S.A. and Canada throughout. Whether you are setting valve clearances, diagnosing a VTEC fault code, rebuilding the transaxle, or tracing an SRS circuit, this is the authoritative reference built for this specific model.

Every section in the manual is structured identically: a table of contents or exploded-view index showing parts disassembly sequence, bolt torques with thread sizes, page references to procedures, disassembly and assembly steps with tools, inspection criteria, testing and troubleshooting procedures, repair instructions, and adjustments. Nothing is missing.

Models and Years Covered

This manual covers every production variant of the 2002 and 2003 Honda Civic EP3 sold in the U.S.A. and Canada:

Body line code EP3 identifies the Civic 2-door hatchback / 5-speed manual with the K20A3 engine. The vehicle was manufactured at Honda of U.K. Manufacturing in Swindon, England, as confirmed by factory code U in the VIN.

Engine — K20A3 2.0L DOHC VTEC

The entire manual is built around the K20A3 engine. The Design Specifications table confirms the following:

Dedicated engine service sections cover the Engine Electrical system, the Engine mechanical section, Cooling, and Fuel and Emissions — each as a separate, fully indexed chapter.

Transmission and Drivetrain

The Transaxle is one of the 23 sections. Design Specifications visible in the manual document the following:

The manual notes that Honda MTF (P/N 08798-9016) must always be used — using motor oil will cause stiffer shifting because it does not contain the proper additives.

Chassis, Suspension, Steering and Brakes

Design Specifications and Standards and Service Limits sections give the following data:

• Overall length: 4,210 mm (165.8 in.) | Width: 1,695 mm (66.7 in.) | Height: 1,440 mm (56.7 in.)
• Wheelbase: 2,570 mm (101.2 in.) | Track (front/rear): 1,470 mm / 1,470 mm (57.9 / 57.9 in.)
• Ground clearance: 152 mm (5.98 in.) | Seating capacity: 4 | GVWR (U.S.A.): 3,660 lbs
• Front suspension: Independent strut with stabiliser, coil spring; telescopic hydraulic nitrogen gas-filled shock absorber
• Rear suspension: Double wishbone; telescopic hydraulic nitrogen gas-filled shock absorber
• Steering: Electric power-assisted rack and pinion; overall ratio 15.1; turns lock-to-lock 2.835; wheel diameter 360 mm (14.2 in.)
• Front brakes: Power-assisted self-adjusting ventilated disc; pad friction surface 45 cm² × 2; standard disc thickness 21.0 mm; service limit 19.00 mm
• Rear brakes: Power-assisted self-adjusting solid disc; pad friction surface 28 cm² × 2; standard disc thickness 9.0 mm; service limit 8.0 mm
• Parking brake: Mechanical actuating on rear wheels; fully applied within 7–8 clicks
• Tyres (front and rear): P195/60 R15 88V | Spare: T125/70 D15 95M

All 23 Manual Sections

This manual is divided into 23 sections as documented in the Introduction. Sections marked with an asterisk (*) include SRS components and require special precautions when servicing:

• Section 1 — General Info: Chassis and paint codes for 2002 and 2003 models, VIN decode, engine and transmission number locations, identification number locations, warning/caution label locations, emission control labels, lift and support points, towing, parts marking
• Section 2 — Specifications: Standards and Service Limits (Engine Electrical, Engine Assembly, Cylinder Head, Engine Block, Engine Lubrication, Cooling, Fuel and Emissions, Clutch, Manual Transmission and Differential, Steering, Suspension, Brakes, Air Conditioning); Design Specifications (Dimensions, Weight, Engine, Starter, Clutch, Manual Transmission, Steering, Suspension, Wheel Alignment, Brakes, Tires, Air Conditioning, Electrical Ratings); Body Specifications illustration
• Section 3 — Maintenance: Lubricants and fluids table with Honda part numbers, Maintenance Schedule for Normal Conditions (by distance/time), Maintenance Schedule for Severe Conditions, spark plug spec (IZFR6K-11 or SKJ20DR-M11), valve clearance spec (intake 0.21–0.25 mm cold; exhaust 0.28–0.32 mm cold), coolant replacement at 120,000 mi/5 years, transmission fluid replacement at 120,000 mi
• Section 4 — Engine Electrical: Starting system including starter solenoid test, starter performance test, starter overhaul; charging system including alternator; ignition system; ECM idle learn procedure
• Section 5 — Engine: Full K20A3 engine mechanical service — cylinder head, VTEC system, camshafts, valves, pistons, crankshaft, oil pump, complete disassembly and reassembly with all torque specs
• Section 6 — Cooling: Coolant system service, water pump, thermostat, radiator; coolant capacity 5.00 L (5.3 US qt), Honda All Season Antifreeze/Coolant Type 2
• Section 7 — Fuel and Emissions: Fuel injection system, ECM, injector testing (resistance 10–13 Ω per injector), DTC P0301–P0304 injector misfire diagnosis, VTEC system, evaporative emissions, IAC, throttle, idle learn procedure
• Section 8 — Transaxle (*): Manual transaxle disassembly and reassembly, differential, clutch system, shift and select cables
• Section 9 — Steering (*): Electric power steering (EPS) system including EPS control unit, torque sensor DTC troubleshooting (e.g., DTC 12 torque sensor T/SIG), EPS motor, rack and pinion service
• Section 10 — Suspension: Front strut and coil spring, rear double wishbone, wheel alignment, wheel bearing service
• Section 11 — Brakes Including ABS (*): Front and rear disc brake service, ABS system, master cylinder, brake booster, parking brake
• Section 12 — Body (*): Door glass and regulator replacement, door panels, front and rear bumpers, hood, hatch, mirrors, weatherstripping, sill panels, roof
• Section 13 — Heating, Ventilation and Air Conditioning (*): HVAC system, blower, evaporator, condenser, compressor (scroll type, SP-10 refrigerant oil), refrigerant HFC-134a (R-134a), system capacity 500–550 g
• Section 14 — Body Electrical (*): All wiring harnesses, connector and harness index, under-hood and under-dash fuse/relay boxes, dashboard harness connector locations, lighting, switches
• Section 23 — Restraints (*): Seatbelt replacement and inspection (front and rear), child seat tether anchor, SRS supplemental restraint system — driver airbag, front passenger airbag, side airbag replacement, cable reel replacement, SRS unit replacement, side impact sensor, OPDS unit, airbag disposal, full DTC troubleshooting index (23-28), symptom troubleshooting index (23-30), circuit diagram (23-34), SRS indicator circuit troubleshooting

Diagnostics and Troubleshooting Depth

This manual goes well beyond basic procedures. The troubleshooting coverage visible throughout the PDF includes:

• Fuel injection misfire diagnosis: ECM Connector B (24P) pinout table, DTC P0301–P0304 mapped to specific injector terminals (B5 BRN, B4 RED, B3 BLU, B2 YEL), injector 2P connector resistance test (10–13 Ω), step-by-step YES/NO diagnosis trees
• EPS electric power steering DTC troubleshooting: DTC 12 torque sensor T/SIG fault, EPS control unit connector C (20P) voltage and continuity tests, torque sensor 6P connector wiring verification
• SRS airbag system: DTC troubleshooting index at 23-28, symptom troubleshooting index at 23-30, full circuit diagram, component replacement after deployment
• Charging system: Voltage and current tests, alternator output verification at specified speeds
• Starting system: Solenoid hold-in and pull-in coil continuity tests, starter performance test at 11.5V (specification: 1.1 kW, 90A or less)

Every troubleshooting procedure follows a numbered step format with clear YES/NO branch decisions, connector identifiers, wire colours, and terminal numbers — making electrical diagnosis straightforward even without a factory scan tool.

Maintenance Schedule and Fluids

Section 3 contains separate maintenance schedules for Normal and Severe Conditions (including Canadian vehicles). Key service intervals and fluid specifications documented in the manual:

• Engine oil: Honda Motor Oil P/N 08798-9023, API certification seal required — oil change capacity without filter 4.0 L (4.2 US qt); with filter 4.2 L (4.4 US qt); overhaul 5.3 L (5.6 US qt)
• Manual transmission fluid: Honda MTF P/N 08798-9016 — replacement at 120,000 mi / 192,000 km
• Brake fluid: Honda DOT 3 P/N 08798-9008 — covers ABS line and clutch line
• Coolant: Honda All Season Antifreeze/Coolant Type 2 — capacity 5.00 L (5.3 US qt); replacement at 120,000 mi / 5 years
• Spark plugs: IZFR6K-11 (NGK) or SKJ20DR-M11 (Denso) — replacement at 120,000 mi / 192,000 km
• Valve clearance (cold): Intake 0.21–0.25 mm (0.008–0.010 in.); Exhaust 0.28–0.32 mm (0.011–0.013 in.)
• A/C refrigerant: HFC-134a (R-134a), 500–550 g (17.6–19.4 oz.)
• A/C refrigerant oil: SP-10, P/N 38897-P13-A01AH or 38899-P13-A01

Service Limits — Key Engine Data

The Standards and Service Limits section contains comprehensive tables. Selected values from the cylinder head and block sections:

• Valve clearance — Intake (cold): 0.21–0.25 mm | Exhaust: 0.28–0.32 mm
• Valve stem O.D. — Intake: 5.475–5.485 mm; service limit 5.445 mm | Exhaust: 5.450–5.460 mm; service limit 5.420 mm
• Cam lobe height — Intake primary: 33.925 mm | Exhaust: 34.092 mm
• Cylinder bore diameter (class A): 86.010–86.020 mm; reboring limit 86.070 mm
• Compression pressure: Checked at 250 rpm with wide open throttle — see Design Specs for ratio 9.8
• Oil capacity — engine overhaul: 5.30 L (5.6 US qt) | Oil change with filter: 4.20 L (4.4 US qt) | Without filter: 4.00 L (4.2 US qt)

Who Should Download This Manual

• EP3 owners doing their own servicing — oil changes, valve adjustments, brake pad replacement, clutch bleeding, coolant flushes
• Independent workshops — the complete torque spec, DTC, and wiring reference for a car that is now old enough to be out of the dealer network
• Engine builders and swap enthusiasts — full K20A3 mechanical data, bore dimensions, bearing clearances, valve timing, VTEC system detail
• Electrical diagnostics — EPS DTC mapping, SRS circuit diagrams, injector connector pinouts, fuse box connector index — everything needed for a complete electrical trace
• Track/performance prep — factory suspension specs, alignment data (camber, caster, toe), wheel bearing end play limits, brake disc service limits

Document Details and Instant Delivery

• Format: PDF
• Pages: 1,182
• Sections: 23
• Language: English
• Edition: First Edition 8/2002
• Publisher: Honda Motor Co., Ltd. — Service Publication Office
• Specifications apply to: U.S.A. and Canada
• Delivery: Instant download link by email immediately after payment; also available in your account
• No physical item shipped — digital file only