
Contents
Child Safety P. 50 Exhaust Gas Hazard P. 62 Safety Labels P. 63
Opening and Closing the Trunk P. 109 Security System P. 112 Opening and Closing the Windows P. 114 
Operating the Switches Around the Steering Wheel P. 117 Adjusting the Mirrors P. 125 
Interior Lights/Interior Convenience Items P. 134 Heating and Cooling*
 P. 140
Audio Error Messages *
 P. 172 General Information on the Audio System *
 P. 174
When Driving P. 211 Braking P. 229 Parking Your Vehicle P. 233 
Accessories and Modifications P. 238
Maintenance Under the Hood P. 251 Replacing Light Bulbs P. 268 
Checking and Maintaining Tires P. 280 Battery P. 289 Remote Transmitter Care *
 P. 290
Cleaning P. 292
Engine Does Not Start P. 306 Jump Starting P. 307 Shift Lever Does Not Move P. 310 
Fuses P. 318 Emergency Towing P. 321
Devices that Emit Radio Waves P. 329 Reporting Safety Defects P. 330 
Authorized Manuals P. 335 Customer Service Information P. 336
Quick Reference GuideP. 2
Safe DrivingP. 23
Instrument PanelP. 65
ControlsP. 97
FeaturesP. 143
DrivingP. 201
MaintenanceP. 239
Handling the UnexpectedP. 297
InformationP. 323
IndexP. 337
2012 Civic 4D Online Reference Owner's Manual
Note: All page numbers referenced in this document are hyperlinked. 

Visual Index
6Quick Reference Guide
❙Maintenance Under the Hood  (P 251)
❙Windshield Wipers (P 121, 278)
❙Tires (P 280, 299)
❙Fog Lights *
 (P 120, 272)
❙Door Lock/Unlock Control  (P 101)
❙Power Door Mirrors*
 (P 125)
❙Headlights  (P 118, 268)
❙Front Turn Signal/Parking/Side Marker Lights  (P 118, 273)
❙How to Refuel (P 235)
❙High-Mount Brake Light *
 (P 277)
❙Emergency Trunk Release Lever  
(P 111)
❙Opening/Closing the Trunk  (P 109)
❙Back-Up Lights (P 275)
❙Brake/Taillights  (P 275)
❙Rear Turn Signal Lights  (P 275)
❙Rear Side Marker Lights  (P 275)   

18
Quick Reference GuideHandling the Unexpected (P 297)
Flat Tire  (P 299)
● Park in a safe location and replace the  
flat tire with the compact spare tire in the  
trunk.
Indicators Come On  
(P 313) ● Identify the indicator and consult the  
owner's manual.
Engine Won't Start  
(P 306) ●If the battery is dead, jump start using a  
booster battery.
Blown Fuse  (P 318)
● Check for a blown fuse if an electrical  
device does not operate.Overheating  (P 311)
● Park in a safe location. If you do not see  
steam under the hood, open the hood,  
and let the engine cool down.
Emergency Towing  
(P 321) ● Call a professional towing service if you  
need to tow your vehicle.          

112
Controls
Security System
Immobilizer System 
The immobilizer system prevents a key that has not been pre-registered from  
starting the engine. Each key contains electronic transmitters that use electronic  
signals to verify the key. 
Pay attention to the following when inserting the key into the ignition switch: •Do not allow objects that emit strong radio waves near the ignition switch.
• Make sure the key is not covered by or touching a metal object.
• Do not bring a key from another vehicle's immobilizer system near the ignition 
switch.
Security System Alarm *
The security system alarm activates when the doors, trunk, or hood are opened  
without the key, or remote transmitter. ■ When the security system alarm activates
The horn sounds intermittently and all of the exterior lights flash.■ To deactivate the security system alarm
Unlock the vehicle using the key, or remote transmitter. The system, along with the  
horn and flashing lights, is deactivated.
1Immobilizer System
NOTICE
Leaving the ignition key in the vehicle can result in  
theft or accidental movement of the vehicle.  
Always take the ignition key with you whenever you  
leave the vehicle unattended. 
Do not alter the system or add other devices to it. 
Doing so may damage the system and make your  
vehicle inoperable.
1Security System Alarm 
The security alarm continues for a maximum of two  
minutes until the security system deactivates.
* Not available on all models 

113
uuSecurity SystemuSecurity System Alarm*
Controls
■
Setting the security system alarm
The security system alarm automatically sets when the following conditions have  
been met: • The ignition switch is in LOCK 
(0 , and the key has been removed from the 
ignition switch.
• The hood and trunk are closed.
• All doors are locked with the key or the remote transmitter.
■ When the security system alarm sets
The security system indicator in the instrument panel blinks. When the blinking  
interval changes after about 15 seconds, the security system is set. ■ To cancel the security system alarm
The security system is canceled when the vehicle is unlocked using the key or remote  
transmitter, or the ignition switch is turned to ON 
(w . The security system indicator 
goes off at the same time.
■The panic button on the remote  
transmitter
If you press the panic button for  
approximately one second, the following will  
occur for about 30 seconds: • The horn sounds.
• Some exterior lights flash.
■ Canceling panic mode
Press any button on the remote transmitter, or turn the ignition switch to ON 
(w .
■Panic Mode
1Security System Alarm 
Do not set the security system alarm when someone  
is in the vehicle or a window is open. The system can  
accidentally activate when:•Unlocking the door with the lock tab or the master  
door lock switch.
• Opening the trunk with the trunk release or the  
emergency trunk opener.
If the battery goes dead after you have set the  
security system alarm, the security alarm may go off  
once the battery is recharged or replaced. 
If this occurs, deactivate the security system alarm by 
unlocking a door using the key or remote transmitter. 
Do not attempt to alter this system or add another  device to it.
Panic  
Button  

202
Driving
Before Driving
Driving Preparation 
Check the following items before you start driving. •Make sure there are no obstructions on the windows, door mirrors, exterior  
lights, or other parts of the vehicle.
uRemove any frost, snow, or ice.
uRemove any snow on the roof, as this can slip down and obstruct your field of  
vision while driving. If frozen solid, remove ice once it has softened.
uWhen removing ice from around the wheels, be sure not to damage the wheel  
or wheel components.
• Make sure the hood is securely closed.
uIf the hood opens while driving, your front view will be blocked.
• Make sure the tires are in good condition.
uCheck air pressure, check for damage and excessive wear.
2 Checking and Maintaining Tires  P. 280
• Make sure there are no people or objects behind or around the vehicle.
uThere are blind spots from the inside.
■Exterior Checks1Exterior Checks
NOTICE
When doors are frozen shut, use warm water around  
the door edges to melt any ice. Do not try to force 
them open, as this can damage the rubber trim  
around the doors. When done, wipe dry to avoid  further freezing. 
Do not pour warm water into the key cylinder. 
You will be unable to insert key if the water freezes in  
the hole. 

239
Maintenance
This chapter discusses basic maintenance.
Before Performing Maintenance Inspection and Maintenance ............ 240
Safety When Performing Maintenance..... 241
Parts and Fluids Used in Maintenance Service ........................................... 242
Maintenance Minder™ .................... 243
Maintenance Under the Hood Maintenance Items Under the Hood ..... 251 
Opening the Hood ........................... 253 
Recommended Engine Oil ...... .......... 254
Oil Check ......................................... 255 
Adding Engine Oil ............................ 257
Changing the Engine Oil and Oil Filter ..... 258
Engine Coolant ................................ 261
Transmission Fluid ............................ 263
Brake/Clutch Fluid ............................ 266 
Refilling Window Washer Fluid......... 267
Replacing Light Bulbs ....................... 268
Checking and Maintaining Wiper 
Blades .......................................... 278
Checking and Maintaining Tires Checking Tires ................................. 280
Tire and Loading Information Label ...... 281 
Tire Labeling .................................... 281
DOT Tire Quality Grading (U.S. Vehicles)....... 283
Wear Indicators................................ 285 Tire Service Life ................................ 285
Tire and Wheel Replacement ........... 286
Tire Rotation .................................... 287 
Winter Tires ..................................... 288
Battery ............................................... 289
Remote Transmitter Care *
Replacing the Battery ....................... 290
Heating and Cooling *
 System 
Maintenance ................................... 291
Cleaning
Interior Care .................................... 292
Exterior Care.................................... 294
* Not available on all models  

253
uuMaintenance Under the HooduOpening the Hood
Maintenance
Opening the Hood1.Park the vehicle on a level surface, and set  
the parking brake.
2. Pull the hood release handle under the 
lower left corner of the dashboard.
uThe hood will pop up slightly.
3. Push up the hood latch lever in the center  
of the hood to release the lock mechanism, 
and open the hood.
4. Remove the support rod from the clamp 
using the grip. Mount the support rod in 
the hood.
When closing, remove the support rod, and 
stow it in the clamp,  then gently lower the 
hood. Remove your hand at a height of 
approximately 12 inches (30 cm) and let the 
hood close.
1Opening the Hood
NOTICE
Do not open the hood when the wiper arms are  raised. 
The hood will strike the wipers, and may damage  
either the hood or the wipers. 
When closing the hood, check that the hood is  
securely latched. 
If the hood latch lever moves stiffly, or if you can  
open the hood without lifting the lever, the latch  
mechanism should be cleaned and lubricated.
Hood Release Handle
Pull
Lever
Support Rod Grip
Clamp