2018 Honda Civic OEM Service & Repair Manual

Service Information The service and repair information contained in this manual is intended for use by qualified, professional technicians. Attempting service or repairs without the proper training, tools, and equipment could cause injury to you or others. It could also damage the vehicle or create an unsafe condition. This manual describes the proper methods and procedures for doing service, maintenance, and repairs. Some procedures require the use of specially designed tools and dedicated equipment. Any person who intends to use a replacement part, a service procedure, or a tool that is not recommended by Honda, must determine the risks to their personal safety and the safe operation of the vehicle. If you need to replace any parts, always use the correct parts supplied by a Honda dealer. Never use inferior quality parts. FOR YOUR CUSTOMER'S SAFETY Proper service and maintenance are essential to the customer's safety and the reliability of the vehicle. Any error or oversight while servicing a vehicle can result in faulty operation, damage to the vehicle, or injury to others. Improper service or repairs can create an unsafe condition that can cause your customers or others to be seriously hurt or killed. Follow the procedures and precautions in this manual and other service materials carefully. FOR YOUR SAFETY Because this manual is intended for a professional service technician, we do not provide warnings about many basic shop safety practices (for example, hot parts－wear gloves). If you have not received shop safety training or do not feel confident about your knowledge of safe servicing practices, we recommend that you do not attempt to do the procedures described in this manual. Failure to properly follow instructions and precautions can cause you to be seriously hurt or killed. Follow the procedures and precautions in this manual carefully. Some of the most important general service safety precautions follow this text. However, we cannot warn you of every conceivable hazard that can arise in doing service and repair procedures. Only you can decide whether or not you should do a given task. IMPORTANT SAFETY PRECAUTIONS Make sure you have a clear understanding of all basic shop safety practices, and that you are wearing appropriate clothing and using safety equipment. When doing any service task, be especially careful of the following: － Read all of the instructions before you begin, and make sure you have the tools, the replacement or repair parts, and the skills required to do the tasks safely and completely. － Protect your eyes by using proper safety glasses, goggles, or face shields anytime you hammer, drill, grind, or work around pressurized air or liquids and springs, or other stored-energy components. If there is any doubt, put on eye protection. － Use other protective wear when necessary, such as gloves or safety shoes. Handling hot or sharp parts can cause severe burns or cuts. Before you grab something that looks like it can hurt you, stop and put on gloves. － Protect yourself and others whenever you have the vehicle up in the air. Anytime you raise the vehicle, either with a lift or a jack, make sure that it is always securely supported. Use safety stands if needed. － Protect yourself by wearing an approved welding helmet, gloves, and safety shoes anytime you are welding. You can receive burns from hot parts; allow the parts to cool before working in that area. － Protect yourself from paints and harmful chemicals by wearing an approved respirator, eye protection, and gloves whenever you are painting. Spray paint only in an approved paint booth that is well ventilated. Make sure the engine is off before you begin any servicing procedures, unless the instruction tells you to do otherwise. This will help eliminate several potential hazards: － Carbon monoxide poisoning from engine exhaust. Be sure there is adequate ventilation whenever you run the engine. － Burns from hot parts or coolant. Let the engine and exhaust system cool before working in those areas. － Injury from moving parts. If the instruction tells you to run the engine, be sure your hands, fingers, and clothing are out of the way. Gasoline vapors and hydrogen gases from batteries are explosive. To reduce the possibility of a fire or explosion, be careful when working around gasoline or batteries: － Use only a nonflammable solvent, not gasoline, to clean parts. － Never drain or store gasoline in an open container. － Keep all cigarettes, sparks, and flames away from the battery and all fuel-related parts.

NOTE: Unless otherwise indicated, the illustrations show the 4-door models. Front Passenger's Compartment: Front Passenger’s Compartment (4-door): Rear Passenger’s Compartment (2-door): Rear Passenger’s Compartment (5-door): SRS WARNING INFORMATION MONITOR NOTICE SEAT BELT TENSIONER WARNING SIDE AIRBAG MODULE DANGER PASSENGER AIRBAG WARNING TAG (CHILD SEAT) USA models SIDE CURTAIN AIRBAG MODULE DANGER SIDE CURTAIN AIRBAG MODULE DANGER SIDE CURTAIN AIRBAG MODULE DANGER

Engine Compartment: Doorjamb Area: AIR CONDITIONING INFORMATION EMISSION CONTROL INFORMATION and ENGINE COOLANT INFORMATION EXPANSION TANK CAP DANGER 12 VOLT BATTERY CAUTION TIRE INFORMATION Located on driver's doorjamb

NOTE: Unless otherwise indicated, the illustrations show the 4-door models. Front Passenger’s Compartment: Front Passenger’s Compartment (4-door): Rear Passenger’s Compartment (2-door): Rear Passenger's Compartment (Type-R: 5-door): SRS WARNING INFORMATION MONITOR NOTICE SEAT BELT TENSIONER WARNING SIDE AIRBAG MODULE DANGER FRONT PASSENGER'S AIRBAG ON/OFF SWITCH NOTICE SIDE CURTAIN AIRBAG MODULE DANGER SIDE CURTAIN AIRBAG MODULE DANGER SIDE CURTAIN AIRBAG MODULE DANGER

Engine Compartment: Doorjamb Area: AIR CONDITIONING INFORMATION ENGINE COOLANT INFORMATION EXPANSION TANK CAP DANGER 12 VOLT BATTERY CAUTION TIRE INFORMATION Located on driver's doorjamb

Item Measurement Qualification Specification ENGINE Fuel required (KA/KC) Regular UNLEADED gasoline with 87 Pump Octane Number or higher (ethanol can be used up to 15 % by volume) Fuel required (KX) Regular UNLEADED gasoline with 91 Research Octane Number or higher CLUTCH Type Single plate dry, diaphragm spring MANUAL TRANSMISSION Type Synchronized six-speed forward, one reverse Primary reduction Direct 1:1 Gear ratio 1st 3.642 2nd 2.080 3rd 1.361 4th 1.023 5th 0.829 6th 0.686 Reverse 3.673 Final reduction Type Single helical gear Gear ratio 4.105 CVT Type Electronically-controlled continuously variable transmission, multi plate wet sump, hydraulic Primary reduction Direct 1:1 Gear ratio (1.5 L) Low－High 2.645－0.405 Reverse 1.859－1.265 Gear ratio (2.0 L) Low－High 2.526－0.408 Reverse 2.898－1.480 Final reduction (1.5 L) Type Single helical gear Gear ratio 3.238 Final reduction (2.0 L) Type Single helical gear Gear ratio 3.941 STEERING Type Rack and pinion with electrical power-assisted Overall ratio 10.94 Turns, lock-to-lock 2.2 Steering wheel diameter 370 mm (14.57 in) SUSPENSION Type Front MacPherson strut with stabilizer, coil spring Rear Independent multilink with stabilizer, coil spring Shock absorber Front and rear Telescopic, hydraulic, nitrogen gas-filled TIRES Size See tire information label attached to driver's doorjamb. BRAKES Type of service brake Front Power-assisted self-adjusting ventilated disc Rear Power-assisted self-adjusting solid disc Type of parking brake Electrical parking brake AIR CONDITIONING Compressor Type Variable swash plate type Capacity 140 mL (8.5 cu in)/rev Maximum speed 9,500 rpm Condenser Type Corrugated fin Evaporator Type Corrugated fin Blower Type Stabilized swirling flow Motor type 235 W/12 V Speed control Continuously variable Maximum capacity 485 m 3 (17,128 cu ft)/h Temperature control Air-mix type Compressor clutch Type Dry, single plate, poly V-belt drive Electrical power consumption at 68 °F (20 °C) 35 W maximum at 12 V ELECTRICAL RATINGS 12 volt battery 55B24L 12 V－47 Ah/20 HR (12 V－38 Ah/5 HR) L2 12 V－60 Ah/20 HR (12 V－48 Ah/5 HR) Fuses Under-hood fuse/relay box 125 A, 70 A, 60 A, 50 A, 40 A, 30 A, 20 A, 15 A, 10 A, 5 A Under-dash fuse/relay box 20 A, 15 A, 10 A, 5 A Light bulbs Headlights (low) 12 V－55 W LED Headlights (high) 12 V－60 W LED Front parking lights LED

Item Measurement Qualification Specification Daytime Running Lights (DRL) LED Front side marker lights 12 V－3 W Front turn signal lights 12 V－21 W LED Side turn signal lights LED Fog lights 12 V－35 W Brake lights 12 V－21 W Taillights LED Inner taillight LED Rear side marker lights LED Rear turn signal lights 12 V－21 W Back-up lights 4-door: 12 V－16 W 2-door: 12 V－6 W High mount brake light 4-door: 12 V－21 W 2-door: LED License plate light LED Ceiling light 12 V－8 W Trunk light 12 V－5 W Vanity mirror lights 12 V－2 W Ambient light LED Front individual lights 12 V－8 W Tray light (upper/lower) LED

Item Measurement Qualification Specification ENGINE Fuel required (KA/KC) Regular UNLEADED gasoline with 87 Pump Octane Number or higher (ethanol can be used up to 15 % by volume) Fuel required (KX) Regular UNLEADED gasoline with 91 Research Octane Number or higher CLUTCH Type Single plate dry, diaphragm spring MANUAL TRANSMISSION Type Synchronized six-speed forward, one reverse Primary reduction Direct 1:1 Gear ratio 1st 3.642 2nd 2.080 3rd 1.361 4th 1.023 5th 0.829 6th 0.686 Reverse 3.673 Final reduction Type Single helical gear Gear ratio 4.105 CVT Type Electronically-controlled continuously variable transmission, multi plate wet sump, hydraulic Primary reduction Direct 1:1 Gear ratio (1.5 L) Low－High 2.645－0.405 Reverse 1.859－1.265 Gear ratio (2.0 L) Low－High 2.526－0.408 Reverse 2.898－1.480 Final reduction (1.5 L) Type Single helical gear Gear ratio 3.238 Final reduction (2.0 L) Type Single helical gear Gear ratio 3.941 STEERING Type Rack and pinion with electrical power-assisted Overall ratio Without 18 inch wheels 10.94 With 18 inch wheels 11.10 Turns, lock-to-lock Without 18 inch wheels 2.20 With 18 inch wheels 2.08 Steering wheel diameter 370 mm (14.57 in) SUSPENSION Type Front MacPherson strut with stabilizer, coil spring Rear Independent multilink with stabilizer, coil spring Shock absorber Front and rear Telescopic, hydraulic, nitrogen gas-filled TIRES Size See tire information label attached to driver's doorjamb. BRAKES Type of service brake Front Power-assisted self-adjusting ventilated disc Rear Power-assisted self-adjusting solid disc Type of parking brake Electrical parking brake AIR CONDITIONING Compressor Type Variable swash plate type Capacity 140 mL (8.5 cu in)/rev Maximum speed 9,500 rpm Condenser Type Corrugated fin Evaporator Type Corrugated fin Blower Type Stabilized swirling flow Motor type 235 W/12 V Speed control Continuously variable Maximum capacity 485 m 3 (17,128 cu ft)/h Temperature control Air-mix type Compressor clutch Type Dry, single plate, poly V-belt drive Electrical power consumption at 68 °F (20 °C) 35 W maximum at 12 V ELECTRICAL RATINGS 12 volt battery (except 5-door) 55B24L 12 V－47 Ah/20 HR (12 V－38 Ah/5 HR) L2 12 V－60 Ah/20 HR (12 V－48 Ah/5 HR) 12 volt battery (5-door) 55B24L 12 V－47 Ah/20 HR (12 V－36 Ah/5 HR) LN2 12 V－60 Ah/20 HR (12 V－48 Ah/5 HR) Fuses Under-hood fuse/relay box 125 A, 70 A, 60 A, 50 A, 40 A, 30 A, 20 A, 15 A, 10 A, 5 A

Item Measurement Qualification Specification Under-dash fuse/relay box 20 A, 15 A, 10 A, 5 A Light bulbs Headlights (low) 12 V－55 W LED Headlights (high) 12 V－60 W LED Front parking lights LED Daytime Running Lights (DRL) LED Front side marker lights 12 V－3 W Front turn signal lights 12 V－21 W LED Side turn signal lights LED Fog lights 12 V－35 W Brake lights 12 V－21 W Taillights LED Inner taillight (s) LED Rear side marker lights LED Rear turn signal lights 12 V－21 W Back-up lights (except 2-door) 12 V－16 W Back-up lights (2-door) 12 V－6 W High mount brake light (4-door) 12 V－21 W High mount brake light (except 4-door) LED License plate light LED Ceiling light 12 V－8 W Trunk light 12 V－5 W Cargo area light 12 V－5 W Vanity mirror lights 12 V－2 W Ambient light LED Front individual map lights 12 V－8 W Tray light (upper/lower) LED

Item Measurement Qualification Specification ENGINE Fuel required (KA/KC) UNLEADED gasoline with 91 Pump Octane Number or higher (ethanol can be used up to 15 % by volume) Fuel required (KX) UNLEADED petrol with 95 Research Octane Number or higher CLUTCH Type Single plate dry, diaphragm spring MANUAL TRANSMISSION (Si) Type Synchronized six-speed forward, one reverse Primary reduction Direct 1:1 Gear ratio 1st 3.642 2nd 2.080 3rd 1.361 4th 1.023 5th 0.829 6th 0.686 Reverse 3.673 Final reduction Type Single helical gear Gear ratio 4.105 MANUAL TRANSMISSION (Type-R) Type Synchronized six-speed forward, one reverse Primary reduction Direct 1:1 Gear ratio 1st 3.625 2nd 2.115 3rd 1.529 4th 1.125 5th 0.911 6th 0.734 Reverse 3.757 Final reduction Type Single helical gear Gear ratio 4.111 STEERING Type Rack and pinion with electrical power-assisted Overall ratio (Si) 11.2 Overall ratio (Type-R) 11.7 Turns, lock-to-lock 2.1 Steering wheel diameter 370 mm (14.57 in) SUSPENSION Type Front MacPherson strut with stabilizer, coil spring Rear Independent multilink with stabilizer, coil spring Shock absorber Front and rear Telescopic, hydraulic, nitrogen gas-filled TIRES Size See tire information label attached to driver's doorjamb. BRAKES Type of service brake Front Power-assisted self-adjusting ventilated disc Rear Power-assisted self-adjusting solid disc Type of parking brake Electrical parking brake AIR CONDITIONING Compressor Type Variable capacity, swash plate type Capacity 140 mL (8.5 cu in)/rev Maximum speed 9,500 rpm Condenser Type Corrugated fin Evaporator Type Corrugated fin Blower Type Stabilized swirling flow Motor type 235 W/12 V Speed control Continuously variable Temperature control Air-mix type Compressor clutch Type Dry, single plate, poly V-ribbed belt drive Electrical power consumption at 68 °F (20 °C) 35 W maximum at 12 V ELECTRICAL RATINGS 12 volt battery Si (KA) 51R (55B24L): 12 V－47 Ah/20 HR (12 V－38 Ah/5 HR) Except Si (KA) EN LN2: 12 V－60 Ah/20 HR (12 V－48 Ah/5 HR) Fuses Under-hood fuse/relay box 125 A, 70 A, 60 A, 50 A, 40 A, 30 A, 20 A, 15 A, 10 A, 5 A Under-dash fuse/relay box 20 A, 15 A, 10 A, 5 A Light bulbs Headlights (low) 12 V－55 W LED Headlights (high) 12 V－60 W LED Front parking lights LED Daytime Running Lights (DRL) LED

2018 Honda Civic OEM Service & Repair Manual

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