2014 VOLKSWAGEN JETTA HYBRID ECU

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. 97 In the driver door: Storage compartment.

WARNING
When powered by the electric motor, the vehicle makes much less noise, both when idling and driving, than when it is running on the internal combustion engine. It is much harder or even impossible for the drivers of other vehicles and above all for cyclists, pedestrians, and children to hear the vehicle when it is running on electrical power.
x Pedestrians and others can be struck and seriously injured because they cannot hear the vehicle and tell that it is getting close to them, for instance when you are parking, backing up, or driving in a low-speed zone where there is likely to be pedestrian traffic.
x Always watch out for pedestrians, especially small children, cyclists, and others who may not hear the vehicle or realize that it is about to move or will cross their path of travel.
x Always be especially careful in residential areas, school zones, and other places where the speed of motor vehicles is restricted and pedestrians may be at greater risk.
x Make sure the ignition and the hybrid drive system have both been turned off before leaving the vehicle.
WARNING
Never leave the vehicle when READY is displayed in the Instrument cluster or when hybrid drive system indicator lights are still lit. The vehicle can move if the accelerator is depressed even though the combustion engine has been stopped. This can cause accidents and severe or fatal injuries.
x Make sure the transmission is in Park (P) before you get out of the vehicle.
WARNING
Never support the vehicle with cinder blocks, bricks, or other objects to inspect it. The vehicle could slip or move suddenly and cause an accident with serious personal injury.
WARNING
Never let the hybrid battery get wet. Liquids and other fluids can cause short circuits, electrical shock, burns, and explosions.
x Never carry large amounts of liquids or other fluids in the luggage compartment.
x Always make sure that any containers with liquids and other fluids are properly secured and tightly closed to prevent leakage during normal driving as well as hard cornering, braking, and other vehicle maneuvers. Leaking liquids can get into the cover of the high-voltage battery and the high-voltage cable connections. This can damage the electrical system and the high-voltage battery.
Never drive until the fuel tank is completely empty. There may not always be enough charge in the high-voltage battery to get to the next gas station.
When outside temperatures are low, a cold high-voltage battery can affect how the combustion engine starts up and can also reduce the vehicle's range in electric drive.

Sailing
If the accelerator is not depressed and the lever is in position D, the combustion engine is switched off, even at higher speeds. The vehicle then decelerates slower than conventional vehicles. This feature can be used to help reduce fuel consumption when you keep traffic conditions in mind and can anticipate the vehicle's power requirements. The instrument cluster powermeter shows zero.
Brake energy regeneration (Recuperation/charge)
When the vehicle brakes, the electrical energy is generated by the electric motor, which works as an alternator and charges the high-voltage battery. The same thing occurs while the vehicle is coasting to a stop or driving downhill.
Energy regeneration is shown in the instrument cluster display or on the Infotainment System screen. The combustion engine may be switched off automatically in this situation. The instrument cluster powermeter registers below zero.
When the high voltage battery is fully charged, there is no brake energy recuperation, and therefore no engine braking. Recuperation and engine braking are also automatically reduced if the vehicle detects that the road conditions do not permit sufficient contact between the wheels and the road surface.
Automatic starting - combustion engine
The combustion engine is started automatically in a number of situations.
x Engine temperature is too low.
x Catalytic converter temperature is too low.
x The high-voltage battery requires recharging.
x High-voltage battery is being charged at high rate when decelerating. The high-voltage battery cannot absorb any more energy and for this reason the electric motor cannot brake the vehicle. The combustion engine comes on to help slow the vehicle down (engine brake).
x Engine hood is open.
x Leaving the vehicle when the electric motor is still “live”. The status of the electric motor is not always obvious, particularly when the combustion engine is not running. The combustion engine will therefore start if the driver's safety belt is unlatched or the driver's door is opened when the transmission is in Park (P) or Neutral (N), Warning when leaving the vehicle.
Energy flow display

Fig. 125 Energy flow display. A: Instrument cluster. B: Infotainment System.

Hybrid drive energy flow is shown with symbols and arrows in the instrument cluster display (MFI) and on the Infotainment System screen. The displays let you know whether the electric motor or the engine is active while driving.
Explanation of the symbols that appear in the energy flow display when the vehicle is not moving
⇒ fig. 125:
(1) Symbol for combustion engine in the instrument cluster display
(2) Symbol for vehicle drive in the instrument cluster display
(3) Symbol for high-voltage battery in the instrument cluster display
(4) Symbol for combustion engine on the Infotainment System screen.
(5) Symbol for vehicle drive on the Infotainment System screen.
(6) Symbol for high-voltage battery on the Infotainment System screen.
Color codes

Color Infotainment System screen
Orange Energy flow from combustion engine (combustion engine drive).
Blue Energy flow from the high-voltage battery (electrical motor drive).
Energy flow to the high-voltage battery (battery charge).
Green Power regeneration through deceleration or braking (recuperation).
High-voltage battery

Fig. 126 Location of the high-voltage battery: Under the luggage compartment floor.

DANGER
The vehicle's high-voltage electrical system and high-voltage battery are dangerous and can cause burns, other serious personal injuries, electrocution, and death.
x Always assume that high-voltage battery and parts of the high-voltage system are fully charged and energized.
x Never touch or let jewelry or other metal objects contact high-voltage cables or the high-voltage battery and battery poles, especially if the cables, battery, and battery poles have been damaged in any way.
x Never do any work yourself on the high-voltage electrical system, the orange-colored high-voltage wiring, or on the high-voltage battery.
x Never open, service, repair, or disconnect any part of the hybrid electrical system.
x Never damage the orange-colored high-voltage cables. Never remove them and never disconnect them from the high-voltage electrical system.
x Never open or remove the orange-colored cover on the high-voltage battery.
x Always have work on the hybrid electrical system and systems that could be indirectly affected by it done by qualified, trained technicians who have the know-how, experience, documentation, and tools to do the work safely.
x All work on the high-voltage electrical system and the high-voltage battery must be done in compliance with Volkswagen standards and guidelines.
x Vehicle keys must be safely stored a safe distance from vehicle so that the ignition cannot be switched on and energize the electrical system.
x Gases vented or released from the high-voltage battery vapors are potentially poisonous and can burn.
x Physical damage to the vehicle or the high-voltage battery can result in immediate or delayed release of poisonous gases that can also cause a fire.
x Always avoid contact with leaking fluids and gases escaping from the battery, particularly one that has been damaged.
x Always tell emergency responders that the vehicle has a high-voltage battery.
WARNING
Unintended vehicle movement during maintenance work can cause serious personal injuries.
x Never work under the vehicle unless you have safely secured the vehicle from moving. If you must work under the vehicle with the wheels on the ground, always make sure that the vehicle is on level ground, that all 4 wheels are chocked to keep them from moving, and that the key is not in the ignition.
x If you must work under a vehicle raised on a floor jack, always make sure that the vehicle is safely supported on safety stands intended for that purpose that are strong enough to support the weight of the vehicle. The jack supplied with the vehicle is not strong enough for this purpose and can collapse causing serious personal injury.

When the hood is properly closed, you can see that it fits flush with the other body parts. The display in the instrument cluster no longer indicates that the engine hood is open, Display.
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. 144.
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. 143 (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!

WARNING
Working on the batteries or the electrical system in your vehicle can cause serious acid burns, fires, explosions, or electrical shocks. Always read and heed the following WARNINGS and safety precautions before working on the batteries or the electrical system.
x Before working on the electrical system, always switch off the ignition and all electrical consumers and disconnect the negative (-) cable from the standard 12 Volt battery.
x When you change a light bulb, always switch off the light first.
x Always keep children away from battery acid and vehicle batteries in general.
x Always wear eye protection. Never let battery acid or lead particles come into contact with your eyes, skin, or clothing.
x Sulfuric battery acid is very corrosive. It can burn unprotected skin and cause blindness. Always wear protective gloves and eye protection. To reduce your risk of injury, never tilt the batteries, as this could spill acid through the vents and burn you.
x If you get battery acid in your eyes or on your skin, immediately rinse with cold water for several minutes and then get immediate medical attention. If you swallow any battery acid, get medical attention immediately.
x When disconnecting the batteries from the vehicle electrical system, always disconnect the negative cable (-) first and then the positive cable (+).
x Always switch off all electrical consumers before reconnecting 12 Volt batteries. Reconnect the plus cable (+) first and then the negative cable (-). Never reverse the polarity of the connections. This could cause a fire.
x A highly explosive mixture of gases is given off when the battery is being charged.
x Do not smoke and avoid fires, sparks, and open flames when working. Never create sparks or electrostatic charges when handling cables and electrical equipment. Never short circuit the battery terminals. High-energy sparks can cause serious personal injury.
x Never use or attempt to charge a damaged or frozen battery, or a battery that was frozen but has thawed. Charging a frozen or thawed battery could cause explosions and chemical burns! Replace damaged or frozen vehicle batteries immediately. A dead battery can freeze at temperatures around +32 °F (0 °C).
x If the battery has a vent line or tube, make sure that it is properly connected to the battery.
x Always make sure that the vent line is securely attached to a vehicle battery that is located in the luggage compartment.
WARNING
California Proposition 65 Warning
x Battery posts, terminals, and related accessories contain lead and lead components, chemicals known to the State of California to cause cancer and reproductive harm. Wash your hands after handling.
NOTICE
x Do not expose the vehicle battery to direct sunlight for an extended period of time as ultraviolet rays may damage the battery housing.
x If the vehicle is left standing in the cold for a long time, protect the vehicle battery from freezing. A battery will be permanently damaged by freezing.
Undeployed battery isolator modules are classified as Perchlorate Material. Special handling may apply – see http://www.dtsc.ca.gov/hazardouswaste/perchlorate. Obey all applicable legal