ECU VOLKSWAGEN JETTA 2012 Owner's Manual

WARNING
Objects in the driver footwell can prevent the pedals from moving freely. This can cause loss of vehicle control and increase the risk of serious personal injuries.
x Always make sure that nothing can interfere with the pedals.
x Always fasten floor mats securely to the floor.
x Never put floor mats or other floor coverings on top of already installed floor mats.
x Always make sure that nothing can fall into the driver footwell while the vehicle is moving.
WARNING
Some kinds of cigarette lighters can be lit unintentionally, or crushed causing a fire that can result in serious burns and vehicle damage.
x Always make sure that there are no lighters in the seat tracks or near other moving parts before adjusting the seats.
x Before closing a storage compartment, always make sure that no cigarette lighter can be activated, crushed, or otherwise damaged.
x Never leave a cigarette lighter in a storage compartment, on the instrument panel, or in other places in the vehicle. Heat buildup in the passenger and luggage compartment of a parked vehicle can result in temperatures in the vehicle that are much higher than the outside temperatures, particularly in summer. High temperatures could cause the cigarette lighter to catch fire.
NOTICE
x The defroster heating wires or antenna in the rear window can be damaged by hard or sharp things on the shelf below the rear window.
x Do not keep any food, medicine, or other items sensitive to heat or cold in the vehicle. They can be damaged or made unusable by heat or cold.
x Things that are made of transparent materials (such as eyeglasses, magnifying glasses, or transparent suction cups on the windows) can magnify sunlight and damage the vehicle.
Storage compartment in the doors

Fig. 95 In the driver door: Storage compartment.

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When the hood is properly closed, you can see that it fits flush with the other body parts.
WARNING
If the hood is not closed properly, it could fly up and block your view while you are driving. This can lead to a crash and serious personal injuries.
x After closing the engine hood, check that the hood release lever is properly latched into the hood latch. The engine hood must be flush with the surrounding auto body parts.
x If you ever notice that the hood latch is not properly secured when the vehicle is moving, stop at once and close it.
x Never let anyone get in the way of the hood when closing it.
NOTICE
x Make sure the windshield wipers are switched off and the windshield wiper arms are resting on the windshield before you open the hood. Otherwise, the windshield wipers and the hood may be damaged.
x Always put the windshield wiper arms down against the windshield before driving the vehicle.
NOTICE
Before opening or closing the engine hood, make sure there is enough room to do so, for example when the vehicle is in a garage.

(A): Do not add any oil ⇒ . Continue with step 15.
(B): Oil may be added (about 1 pint / 0.5 liter). Continue with step 8 or step 15.
(C): You must add oil (about 1 quart / 1.0 liter). Continue with step 8.
8. After reading the oil level, reinsert the dipstick back into the guide tube and push it all the way in.
9. Remove the cap on the engine oil filler opening ⇒ fig. 140.
10. Only add engine oil that Volkswagen has approved for that engine. Add the oil gradually in small quantities (no more than 1 pint / 0.5 liter).
11. To help prevent overfilling, you must wait about 1 minute each time you add oil so that the oil can flow into the oil pan up to the marking on the dipstick.
12. Read the oil level on the dipstick again before adding another small amount, if necessary. Never
add too much oil ⇒ .
13. After adding oil, the level must at least be in the center of the ⇒ fig. 139 (B) area, but never above
(A) ⇒ .
14. After adding oil, securely install the cap on the engine oil filler opening. Otherwise, oil could leak out while the engine is running.
15. Insert the oil dipstick back in the guide tube and push it all the way in.
16. Close the hood ⇒ 
Engine oil level ranges

Required action according to the respective engine oil level:
Range (A) Do not refill oil ⇒ .
Range (B) You may add oil (about 1 pint / 0.5 liter). The oil level may go into the (A) range, but not above the (A) range.
Range (C) You must add oil (about 1 quart / 1.0 liter). After adding oil, make sure that the oil level is about in the middle of the (B) range.
WARNING
Engine oil can ignite when it touches hot engine parts. This can cause fires, burns, and other severe injuries.
x Never spill oil on the engine. Oil spilled on a cold engine can also cause a fire when the engine warms up.
x Always make certain that you screw the cap of the engine oil filler opening back on tightly after adding oil and that the dipstick has been pushed all the way back into the in the guide tube. This helps prevent engine oil from leaking onto the hot engine when the engine is running.
NOTICE
x Do not start the engine if the engine oil level is above range (A). Contact an authorized Volkswagen dealer or an authorized Volkswagen Service Facility. Otherwise the catalytic converter and engine can be damaged!

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Changing the vehicle's suspension system can change the way that the airbag system works in a crash. For example, using tire-rim combinations not approved by Volkswagen, lowering the vehicle, changing the stiffness of the suspension, including the springs, suspension struts, shock absorbers etc. can change the forces that are measured by the airbag sensors and sent to the electronic control unit. Some suspension changes can, for example, increase the force levels measured by the airbag sensors and sent to the electronic control unit and make the airbag system deploy in crashes in which it would not deploy if the changes had not been made. Other kinds of changes may reduce the force levels measured by the sensors and prevent the airbag from deploying when it should.
Never install leather upholstery on a vehicle that originally had cloth upholstery. Never install cloth upholstery on a vehicle that originally had leather upholstery. The capacitive passenger detection system for the Advanced Airbag system will not work properly if different upholstery is installed on the passenger seat than the upholstery originally installed on the vehicle when it was originally manufactured.
WARNING
Changing the vehicle's suspension including use of unapproved tire-rim combinations can change airbag performance and increase the risk of serious personal injury in a crash.
x Never install suspension components that do not have the same performance characteristics as the components originally installed on your vehicle.
x Never use tire-rim combinations that have not been approved by Volkswagen.
WARNING
Leaving the optional safety belt extender attached to the safety belt buckle on the front passenger seat when the safety belt is not being used will prevent the Advanced Airbag System from working properly and can increase the risk of serious personal injury in a collision.
x Leaving the extender attached to the safety belt buckle when the front seat is occupied and the safety belt is not being used will signal to the airbag control unit that the front passenger seat is occupied and that the safety belt is being used. The electronic control unit for the airbag system will then receive incorrect information that will
– cause the safety belt pretensioner to deploy unnecessarily in collisions and
– cause the front passenger airbag to deploy later in collisions in which the front airbag would otherwise be triggered earlier to help protect an unrestrained front seat passenger.
x Always remove the safety belt extender when it is not needed and stow it safely.
x Never use the safety belt extender to secure a child restraint.
WARNING
Items stored between the safety belt buckle and the center console can cause safety belt buckle to send the wrong information to the airbag control unit and prevent the Advanced Airbag System from working properly.
x Always make sure that nothing can interfere with the safety belt buckles and that they are not obstructed.

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human body. Limits and guidelines have been established by governmental authorities and international committees in an effort to keep the electromagnetic radiation from mobile phones at levels that will not cause health problems. However, there is no scientifically based proof that wireless phones are absolutely safe.
Therefore, some experts recommend a precautionary approach regarding the use of mobile phones by taking measures that lower the personal exposure to electromagnetic fields. When using a mobile telephone inside a motor vehicle without a proper connection to an integrated vehicle telephone antenna, the personal exposure to electromagnetic fields will be higher than when using the mobile telephone while properly connected to an integrated or other outside vehicle telephone antenna.
Your vehicle may be equipped with an optional hands-free system that will permit many of the features of compatible Bluetooth® enabled mobile telephones to be used for greater convenience and is consistent with the laws of an increasing number of states and localities that prohibit the use of mobile telephones without some kind of hands-free device.
The hands-free system in your vehicle can be used with certain mobile phones that are connected by wire and hardware connector or via compatible Bluetooth® enabled phones with a cradle that is designed to fit your mobile telephone. The special cradle offers several advantages: The phone cradle must be safely secured to the base plate. Your phone is firmly attached to the instrument panel and is within reach at all times. Placing the phone in its cradle permits it to be charged, but more importantly connects the mobile phone to the vehicle's outside antenna. A mobile telephone that is properly connected to the integrated or other outside vehicle telephone antenna will lower the personal exposure to electromagnetic fields. You should also experience a better quality of service. Although a mobile telephone can be used inside your vehicle without a cradle, the phone will not be securely attached to the vehicle, will not be charged through the cradle wiring, and more importantly will not be connected to the vehicle's integrated telephone antenna. The mobile phone will also not be recharged. You might also experience more dropped calls and an overall impaired quality of the connection.
Therefore we strongly recommend that you use your mobile telephone in your vehicle only when it is properly attached to an appropriate cradle mounted on a base plate on the instrument panel.
Because of the large number and variety of mobile telephones on the market and the frequency with which new models are introduced, Volkswagen does not offer cradles for mobile telephones. Please check with the manufacturer of the mobile telephone that you plan to use.
Bluetooth® is a registered trademark of Bluetooth® SIG, Inc.
WARNING
A mobile phone on the seat, instrument panel or in other places can be thrown around the inside of the vehicle during a sudden braking maneuver, a crash or other accident and injure vehicle occupants.
x Never place or attach accessories or other objects (such as cup holders, telephone brackets, note pads, navigation systems, large, heavy or bulky objects) on the doors, on the windshield, over or near the area marked “AIRBAG” on the steering wheel, instrument panel, backrests or between these areas and the occupant. Such objects could cause serious injury in a collision, especially if an airbag inflates.

WARNING
Improper replacement of burned out headlights and other light bulbs can cause serious personal injury.
x Stop! Always read and heed the WARNINGS before doing any work in the engine compartment, Working in the engine compartment. The engine compartment of any motor vehicle is a potentially dangerous area, and work in this area can lead to serious personal injury.
x HID – High Intensity Discharge (Xenon) headlights get power from a high voltage source that can cause severe personal injury and even death if handled improperly.
x H7 bulbs and HID – High Intensity Discharge (Xenon) headlights are under high pressure and can explode if handled improperly.
x Always let a burned out light bulb cool down before replacing it.
x Never replace a light bulb unless you are familiar with all of the necessary procedures. In particular, never remove a headlight unless you know exactly how to carry out the job and have the correct tools and light bulbs.
x If you are uncertain about what to do, have the work performed by an authorized Volkswagen dealer, an authorized Volkswagen Service Facility, or another qualified workshop. Serious personal injury may result from improperly performed work.
x We strongly recommend that you always have HID – High Intensity Discharge (Xenon) headlights and H7 bulbs replaced by a qualified technician.
x Do not touch the glass of light bulbs with your bare hands. Fingerprints left on the bulb evaporate due to the heat when the bulb is switched on and cause the reflector to “cloud.”
x There are sharp edges on and around the headlight housing in the engine compartment and the rear light housing. Wear hand protection if you replace bulbs.
NOTICE
After replacing a headlight bulb or other light bulb, always make sure that the rubber covers or plastic caps have been properly and securely reinstalled to help prevent water from getting into the electrical connections and headlight housing and damaging the electrical system.
Indicator light

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Please carry out each step only in the order specified:
fig. 172 (A) (B) (C) (C)
Low beam, daytime low beam headlight or daytime running light, side marker light
Front turn signal indicator High beam Parking light (small bulb holder)
4. Turn the bulb holder as far as it goes to the left and pull out with the light bulb facing rearward. Pull out the bulb holder with the light bulb facing rearward.
5. Pull the light bulb straight out of the bulb socket. If necessary, press the lock on the bulb holder.
6. Replace the burned out light bulb with a new bulb of the same type.
7. Insert the bulb holder into the headlight assembly and turn as far as it goes to the right. Insert the bulb holder into the headlight and slide it in completely.
8. Attach the rubber or plastic cover. If applicable slide the securing clip rearward.
The illustrations show the left headlight assembly from the rear. The right headlight assembly is the mirror image of the left headlight assembly.
Different models may have different lights, and the location and design of covers, bulb holders, and bulbs may be in a different location than shown in the illustrations.
You cannot replace the LEDs in LED daytime running lights. Contact your authorized Volkswagen dealer or an authorized Volkswagen Service Facility for assistance.

Please carry out each step only in the order specified:
3. Using the flat blade of the screwdriver from the vehicle tool kit carefully pry the cover
off the slot ⇒ fig. 175 A (1).
4. Unscrew the fastening screws B (3) with your hand and carefully remove the taillight assembly from the luggage compartment lid.
5. Press together the release tabs for the connector plug B (2) in the direction of the arrow and pull the connector plug off.
6. Unlock the bulb holder by pressing the locking tabs in direction of the arrow ⇒ fig. 176 A and remove the bulb holder from the taillight assembly.
7. Replace the burned out light bulb with a new bulb of the same type B.
8. Reinsert the bulb holder in the taillight assembly. The locking tabs must latch with an audible “click”.
9. Attach the connector plug ⇒ fig. 175 B (2) to the bulb holder.
10. Carefully reinsert the taillight assembly into the opening in the luggage compartment lid. Hold the rear light assembly with one hand in the installation position and with the other hand, tighten the fastening screws B (3).
11. Check the taillight assembly for proper installation and secure fit.
12. Attach the cover. The cover must latch tightly and securely into place.
13. Close the luggage compartment lid
LEDs in the taillights in the luggage compartment lid
Changing LEDs is not possible without dismantling vehicle components. Contact an authorized Volkswagen dealer or an authorized Volkswagen Service Facility.
Different models may have different lights, and the location and design of covers, bulb holders, and bulbs may be in a different location than shown in the illustrations.
Replacing taillight bulbs in the vehicle body

Fig. 177 In the side of luggage compartment: A: Open cover of the rear side panel. B: Removing the taillight assembly.

NOTICE
Always make sure the towing eye is screwed all the way into threaded hole so that it is secure. If not, it could be pulled out while your vehicle is being towed.
Driving tips while towing