2018 CHEVROLET SONIC ECU

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
26 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 28
Remote Keyless Entry (RKE) System Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 29
Remote Keyless Entry (RKE) System Operation (Keyless
Access) . . . . . . . . . . . . . . . . . . . . . . 31
Remote Vehicle Start . . . . . . . . . . 37
Door Locks . . . . . . . . . . . . . . . . . . . . 38
Delayed Locking . . . . . . . . . . . . . . . 40
Automatic Door Locks . . . . . . . . . 40
Lockout Protection . . . . . . . . . . . . . 40
Safety Locks . . . . . . . . . . . . . . . . . . . 41
Doors
Trunk (Sedan) . . . . . . . . . . . . . . . . . 42
Liftgate (Hatchback) . . . . . . . . . . . 43
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 44
Vehicle Alarm System . . . . . . . . . 44
Immobilizer . . . . . . . . . . . . . . . . . . . . 45 Immobilizer Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 46
Immobilizer Operation (Keyless Access) . . . . . . . . . . . . . . . . . . . . . . 46
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 47
Manual Mirrors . . . . . . . . . . . . . . . . . 48
Power Mirrors . . . . . . . . . . . . . . . . . . 48
Folding Mirrors . . . . . . . . . . . . . . . . . 48
Heated Mirrors . . . . . . . . . . . . . . . . . 48
Interior Mirrors
Manual Rearview Mirror . . . . . . . . 49
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 49
Manual Windows . . . . . . . . . . . . . . 49
Power Windows . . . . . . . . . . . . . . . 49
Sun Visors . . . . . . . . . . . . . . . . . . . . . 51
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 51
Keys and Locks
Keys
{Warning
Leaving children in a vehicle with
an ignition key or Remote
Keyless Entry (RKE) transmitter is
dangerous and children or others
could be seriously injured or
killed. They could operate the
power window or other controls or
make the vehicle move. The
windows will function with the key
in the ignition or with the RKE
transmitter in the vehicle, and
children or others could be caught
in the path of a closing window.
Do not leave children in a vehicle
with the ignition key or an RKE
transmitter.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
30 Keys, Doors, and Windows
programmed to this vehicle, all
remaining transmitters must also be
reprogrammed. Any lost or stolen
transmitters will no longer work
once the new transmitter is
programmed. See your dealer to
have new transmitters programmed.
Programming with Two
Recognized Keys
To program a new key:1. Insert the original, already programmed key in the ignition
and turn on the ignition.
2. Turn the ignition off, and remove the key.
3. Quickly, within five seconds, insert the second original
already programmed key in the
ignition and turn on the ignition.
4. Turn the ignition off, and remove the key.
5. Insert the new key to be programmed and turn the
ignition on within five seconds. The security light will turn off
once the key has been
programmed.
6. Repeat Steps 1–5 if additional keys are to be programmed.
If a key is lost or damaged, see your
dealer to have a new key made.
Programming without Two
Recognized Keys
Program a new key to the vehicle
when two recognized keys are not
available. Canadian regulations
require that owners see their dealer.
If two currently recognized keys are
not available, follow this procedure
to program the first key.
This procedure will take
approximately 30 minutes to
complete for the first key. The
vehicle must be off and all of the
keys you wish to program must be
with you.
1. Insert the new vehicle key into the ignition. 2. Turn the ignition on. The
security light will come on.
3. Wait 10 minutes until the security light turns off.
4. Turn the ignition off.
5. Repeat Steps 2–4 two more times. After the third time, turn
the ignition on; the key is
learned and all previously
known keys will no longer work
with the vehicle.
6. To program the second key, turn the ignition off and insert
the second key to be learned
and turn the ignition on.
After the two keys are learned,
remaining keys can be learned by
following the procedure in
“Programming with Two
Recognized Keys.”

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Keys, Doors, and Windows 43
To open the trunk from outside of
the vehicle:
.Press
Kon the RKE transmitter
to unlock all doors, then use the
touch pad.
. Press and hold
Yfor Key
Access, or press
Xtwice for
Keyless Access vehicles, on the
RKE transmitter.
See Remote Keyless Entry (RKE)
System Operation (Key Access)
0 29 orRemote Keyless Entry
(RKE) System Operation (Keyless
Access) 031.
To lock the trunk from outside press
Qon the RKE transmitter.
Emergency Trunk Release
Handle
Caution
Do not use the emergency trunk
release handle as a tie-down or
anchor point when securing items
in the trunk as it could damage
the handle.
There is a glow-in-the-dark
emergency trunk release handle on
the underside of the trunk lid. This
handle will glow following exposure
to light. Pull the release handle
down to open the trunk from the
inside.
After use, return to the stored
position.
Liftgate (Hatchback)
{Warning
Exhaust gases can enter the
vehicle if it is driven with the
liftgate, hatch/trunk open, or with
any objects that pass through the
seal between the body and the
hatch/trunk or liftgate. Engine
exhaust contains carbon
monoxide (CO) which cannot be
seen or smelled. It can cause
unconsciousness and even death.
If the vehicle must be driven with
the liftgate or hatch/trunk open:. Close all of the windows.
. Fully open the air outlets on
or under the instrument
panel.
. Adjust the climate control
system to a setting that
brings in only outside air
and set the fan speed to the
(Continued)

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
44 Keys, Doors, and Windows
Warning (Continued)
highest setting. See
“Climate Control Systems”
in the Index.
. If the vehicle is equipped
with a power liftgate, disable
the power liftgate function.
For more information about
carbon monoxide, see Engine
Exhaust 0190.
To lock or unlock the liftgate from
the inside, press
QorKon the
central locking switch or on the
driver door switch.
The vehicle must be in P (Park) for
automatic transmissions. For
manual transmissions the parking
brake must be engaged.
To open the liftgate from the
outside, press
Kon the RKE
transmitter to unlock all doors, then
use the touch pad.
See Remote Keyless Entry (RKE)
System Operation (Key Access)
0 29 orRemote Keyless Entry
(RKE) System Operation (Keyless
Access) 031.
When closing the liftgate, close from
the center to ensure that it fully
latches.
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft alarm
system.
The indicator light on the instrument
panel near the windshield indicates
the status of the system.
Off : Vehicle is disarmed.
On Solid : Vehicle is secured
during the delay to arm the system.
Fast Flash : Vehicle is unsecured.
A door, the hood, or the trunk/
liftgate is open.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
46 Keys, Doors, and Windows
Immobilizer Operation
(Key Access)
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the key is
removed from the ignition.
The system is automatically
disarmed when the vehicle is
started with the correct key. The key
uses a transponder that matches an
immobilizer control unit in the
vehicle and automatically disarms
the system. Only an authorized key
starts the vehicle. The vehicle may
not start if the key is damaged.
The security light in the instrument
cluster comes on if there is a
problem with arming or disarming
the theft-deterrent system.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
ignition off and try again.
If the engine still does not start, and
the key appears to be undamaged
or the light continues to stay on, try
another ignition key. If the engine
does not start with the other key, the
vehicle needs service. If the vehicle
does start, the first key may be
damaged. See your dealer who can
service the theft-deterrent system
and have a new key made.
Do not leave the transmitter or
device that disarms or deactivates
the theft-deterrent system in the
vehicle.Immobilizer Operation
(Keyless Access)
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the transmitter
leaves the vehicle.
The immobilization system is
disarmed when ENGINE START/
STOP is pressed and a valid
transmitter is found in the vehicle.
The security light in the instrument
cluster comes on when there is a
problem with arming or disarming
the theft-deterrent system.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Keys, Doors, and Windows 47
The system has one or more
transmitters matched to an
immobilizer control unit in your
vehicle. Only a correctly matched
transmitter will start the vehicle.
If the transmitter is ever damaged,
you may not be able to start your
vehicle.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
vehicle off and try again.
If the RKE transmitter appears to be
undamaged, try another transmitter.
Or, you may try placing the
transmitter in the front cupholder.
See“Starting the Vehicle with a Low
Transmitter Battery” underRemote
Keyless Entry (RKE) System
Operation (Key Access) 029 or
Remote Keyless Entry (RKE)
System Operation (Keyless Access)
0 31. If the engine does not start with the
other transmitter or when the
transmitter is in the pocket in the
front cupholder, the vehicle needs
service. See your dealer who can
service the theft-deterrent system
and have a new transmitter
programmed to the vehicle.
Do not leave the transmitter or
device that disarms or deactivates
the theft-deterrent system in the
vehicle.Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror's surface is
curved so more can be seen from
the driver seat.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Seats and Restraints 53
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 54
Front Seats
Seat Adjustment . . . . . . . . . . . . . . . 55
Power Seat Adjustment . . . . . . . . 56
Lumbar Adjustment . . . . . . . . . . . . 56
Reclining Seatbacks . . . . . . . . . . . 57
Front Seat Armrest . . . . . . . . . . . . 58
Heated Front Seats . . . . . . . . . . . . 58
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 59
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 61
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . 62
Lap-Shoulder Belt . . . . . . . . . . . . . 63
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 65
Seat Belt Extender . . . . . . . . . . . . . 66
Safety System Check . . . . . . . . . . 66
Seat Belt Care . . . . . . . . . . . . . . . . . 66
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . 67
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 67
Where Are the Airbags? . . . . . . . 69
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 70
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . 71
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 72
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 72
Passenger Sensing System . . . 73
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . . 77
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 78
Airbag System Check . . . . . . . . . . 78
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 79
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 79
Infants and Young Children . . . . 81
Child Restraint Systems . . . . . . . 83
Where to Put the Restraint . . . . . 85
Lower Anchors and Tethers forChildren (LATCH System) . . . . 86
Replacing LATCH System Parts After a Crash . . . . . . . . . . . . . . . . . 93 Securing Child Restraints (With
the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . . 93
Securing Child Restraints (With the Seat Belt in the
Front Seat) . . . . . . . . . . . . . . . . . . . 95

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Seats and Restraints 55
Rear Seats
The vehicle's rear seats have
adjustable head restraints in the
outboard seating positions.
The height of the head restraint can
be adjusted. Pull the head restraint
up to raise it. Try to move the head
restraint to make sure that it is
locked in place.
To lower the head restraint, press
the button, located on the top of the
seatback, and push the head
restraint down. Try to move thehead restraint after the button is
released to make sure that it is
locked in place.
If you are installing a child restraint
in the rear seat, see
“Securing a
Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) 086.
Front Seats
Seat Adjustment
Manual Seats
{Warning
You can lose control of the
vehicle if you try to adjust a driver
seat while the vehicle is moving.
Adjust the driver seat only when
the vehicle is not moving.