2008 BMW M3 CONVERTIBLE check engine light

Maintenance
122
Socket for On-Board
Diagnosis OBD
Primary components that make up exhaust
emissions can be checked by a device via the
OBD socket.
This socket is located on the driver's side to the
left, on the bottom of the instrument panel
underneath a cover.
Exhaust emission values
The warning lamp lights up:
The exhaust emission values have
worsened. Have the car checked as
soon as possible.
Canadian models display this warning
lamp.
The lamp flashes under certain conditions. This
indicates excessive misfiring in the engine. If
this happens, you should reduce your speed
and visit your nearest BMW center as soon as
possible. Severe engine misfiring can quickly
lead to serious damage of emissions-related
components, especially the catalytic converter.
The warning lamp comes on if the gas
cap is not properly tightened and the
OBD system assumes that fuel vapor
is escaping. If the gas cap is then tightened, the
warning lamp should go out within a few days.
Event data recorders
Your vehicle may be equipped with one or sev-
eral measuring or diagnostic modules or a
device for recording or sending certain vehicle
data or information. In addition, if you have
signed a service contract for BMW Assist, cer-tain vehicle data may be transmitted or
recorded in order to facilitate the corresponding
services.

Reference
At a glance
Controls
Driving tips
Mobility
137
Preparation
1.Check whether the battery of the other
vehicle has a voltage of 12 volts and
approximately the same capacitance in Ah.
This information can be found on the bat-
tery.
2.Switch off the engine of the assisting vehi-
cle.
3.Switch off any consumers in both vehicles.
There must not be any contact between
the bodies of the two vehicles, otherwise
there is a danger of shorting.<
Connecting jumper cables
Connect the jumper cables in the correct
order, so that no sparks which could
cause injury occur.<
Your BMW has a jump-starting connection in
the engine compartment which acts as the bat-
tery's positive terminal, refer also to the Engine
compartment overview on page117. The cap is
marked with +.
1.Pull the cap of the BMW jump-starting con-
nection up to remove.
2.Attach one terminal clamp of the plus/+
jumper cable to the positive terminal of the
battery or a starting-aid terminal of the vehi-
cle providing assistance.
3.Attach the second terminal clamp of the
plus/+ jumper cable to the positive terminal
of the battery or a starting-aid terminal of
the vehicle to be started.
4.Attach one terminal clamp of the minus/–
jumper cable to the negative terminal of the
battery or to an engine or body ground of
the assisting vehicle. Your BMW has a special nut as body ground
or negative pole.
5.Attach the second terminal clamp of the
minus/– jumper cable to the negative termi-
nal of the battery or to the engine or body
ground of the vehicle to be started.
Starting the engine
1.Start the engine of the donor vehicle and
allow it to run for a few minutes at slightly
increased idle speed.
2.Start the engine on the other vehicle in the
usual way.
If the first start attempt is not successful,
wait a few minutes before another attempt
in order to allow the discharged battery to
recharge.
3.Let the engines run for a few minutes.
4.Disconnect the jumper cables by reversing
the above connecting sequence.
If necessary, have the battery checked and
recharged.
Never use spray fluids to start the
engine.<
Tow-starting, towing away
Observe the applicable laws and regula-
tions for tow-starting and towing vehi-
cles.<
Do not transport any passengers other
than the driver in a vehicle that is being
towed.<

Reference
At a glance
Controls
Driving tips
Mobility
141
Door open
Engine compartment lid open
Lights up in red:
Backrest of driver's seat or front pas-
senger's seat not lockedLock the backrest, otherwise the safety
belt will not provide protection in the
event of an accident.
Lights up in yellow:
Seat backrest monitor malfunctioningEngage the seat backrest. Have it
checked by your nearest BMW center.
Lights up in red:
Roof activation system failure Roof cannot be moved. If the retract-
able hardtop does not lock, contact
your nearest BMW center.
Roof activation system malfunctioning Roof movement incomplete. Please
check if the roof is blocked, then press
or pull the switch again.
Lights up in yellow:
Roof drive overheated Roof activation temporarily limited to
closing only.
Cargo bay partition not in lowermost
positionPress down the cargo bay partition until
it engages on both sides.
Vehicle not level, roof activation not
possibleMove the vehicle to a level surface.
Rollover protection system malfunc-
tioningHave the rollover protection system
checked by your nearest BMW center.
Gas cap missing or loose Make sure that the gas cap is correctly
positioned and close it until it audibly
clicks. Do not jam the strap between the
gas cap and the vehicle.
Windshield washer fluid level too low Add washer fluid as soon as possible,
refer to page57.
12Cause What to do

Indicator and warning lamps
142Lights up in red:
Service due Arrange a service appointment.
Check service requirements, refer to
page63.
Lights up in yellow:
The engine will start the next time the
start/stop button is touched, possibly
without the brake or clutch being
depressed
Remote control malfunctioning or, in
cars with convenient access, not
detectedThe engine cannot be started. Have the
remote control checked, if necessary.
Battery in remote control discharged Use the remote control for a longer jour-
ney or, in cars with convenient access,
replace the battery.
Belt tensioners and/or airbag system
failedHave the system checked immediately.
Lights up:
Emergency Request system has failed
or is malfunctioningHave the system checked as soon as
possible.
Lights up in red:
Engine malfunction Stop the car and switch off the engine.
You cannot continue your journey. Con-
tact your BMW center.
Lights up in yellow:
Full engine power is no longer available You can continue your journey, but
moderate your speed and exercise due
caution. Have the engine checked as
soon as possible.
Indication in US models:
Warning lamp comes on:
Engine malfunction with adverse effect
on exhaust emissionsHave the car checked as soon as possi-
ble.
Indication in Canadian models:
Warning lamp comes on:
Engine malfunction with adverse effect
on exhaust emissionsHave the car checked as soon as possi-
ble.
12Cause What to do

Reference
At a glance
Controls
Driving tips
Mobility
143
Lights up in red:
Engine overheating Carefully bring the car to a stop, switch
off the engine and allow it to cool down.
Do not open the hood, otherwise there
would be a risk of injury by scalding.
Contact your BMW center.
Lights up in yellow:
Engine too hot Continue driving at more moderate
speed so that the engine can cool
down. Have the engine checked with-
out delay if the situation reoccurs.
Lights up in red:
Battery is no longer being charged.
Alternator malfunctionSwitch off all unnecessary electrical
consumers. Have the power supply
system checked without delay.
Lights up in yellow:
Battery charge level very low, battery
aged or not securely connectedHave the battery checked as soon as
possible.
Indication in US models
Parking brake applied
Indication in Canadian models
Parking brake applied
Indication in US models
Lights up in red:
Brake fluid level too low If brake pedal travel is considerably
longer than usual, stop immediately.
Contact your BMW center.
Lights up in yellow:
Drive-off assistant has failed. The car
will not be held in place after the brake
is releasedHave the system checked as soon as
possible.
Indication in Canadian models
Lights up in red:
Brake fluid level too low If brake pedal travel is considerably
longer than usual, stop immediately.
Contact your BMW center.
Lights up in yellow:
Drive-off assistant has failed. The car
will not be held in place after the brake
is releasedHave the system checked as soon as
possible.
12Cause What to do

Indicator and warning lamps
144Indication in US models
Brake pads worn Have the condition of the brake pads
checked without delay.
Indication in Canadian models
Brake pads worn Have the condition of the brake pads
checked without delay.
Indication in US models
Vehicle electronics failed You cannot continue your journey. Con-
tact your BMW center.
Indication
* in Canadian models
Vehicle electronics failed You cannot continue your journey. Con-
tact your BMW center.
Indication
* in Canadian models
Vehicle electronics failed You cannot continue your journey. Con-
tact your BMW center.
Lights up in red: Have the system in question checked
without delay.
>Starter failed or The engine cannot be restarted.
>ignition malfunctioning. Engine
restart only possible when brake is
depressed or
>lighting system failed. Low beams/
tail lamps and brake lamps still
operational. All other lamps failedDepress the brake to restart the engine.
Lights up in yellow:
>Control of the brake lamps failed or
>fuel supply malfunctioningYou can continue your journey, but
moderate your speed and exercise due
caution. Have the system in question
checked without delay.
>Drive malfunctioning Transmission limp-home program
active with reduced acceleration. You
can continue your journey, but moder-
ate your speed and exercise due cau-
tion. Have the system checked immedi-
ately.
12Cause What to do

Indicator and warning lamps
146Vehicles with Tire Pressure Monitor
*
Light up in yellow and red:
There is a flat tire or substantial loss of
tire pressureCarefully bring the car to a stop. Comply
with the additional information starting
on page70.
Light up in yellow:
Tire Pressure Monitor not initialized Check the inflation pressure and reset
the system, refer to page70.
The small lamp flashes in yellow and
then lights up continuously; the larger
lamp comes on in yellow:
Tire Pressure Monitor has failed. Punc-
tures are not indicatedHave the system checked. Comply with
the additional information starting on
page71.
Lights up in red:
>Transmission limp-home program
active with restricted range of
gears, possibly with reduced accel-
eration.You can continue your journey, but
moderate your speed and exercise due
caution. It may not be possible to con-
tinue the trip after stopping. Have the
system checked without delay.
Gears can be engaged without
depressing the brakeAlways depress the brake to engage a
gear.
Lights up in yellow:
>Transmission limp-home program
active with reduced range of gearsYou can continue your journey, but
moderate your speed and exercise due
caution. Have the system checked
without delay.
>Transmission position P malfunc-
tioning:
Selector lever locked in position P
with engine running or ignition
switched on and brake depressedRelease transmission lock, refer to
page51. Have the system checked as
soon as possible.
>Brake signal malfunctioning: gear
can be engaged without depress-
ing the brakeTo engage a gear while the vehicle is at
a standstill, always step on the brake.
Before leaving the vehicle, switch off
the engine. Have the system checked
as soon as possible.
12Cause What to do

Reference
At a glance
Controls
Driving tips
Mobility
147
Lights up in red:
Transmission overheating Stop the car and switch off the engine.
Allow the transmission to cool down.
You can continue your journey, but
moderate your speed and exercise due
caution. Have the system checked if the
situation reoccurs.
Lights up in yellow:
Transmission too hot Avoid high engine loads. You can con-
tinue your journey, but moderate your
speed and exercise due caution.
P is not engaged. Vehicle not pre-
vented from rolling
Selector lever malfunctioning You can continue your journey. Shift
into the desired position again, if neces-
sary. Have the system checked if the
situation reoccurs.
Brake signal malfunctioning: gear can
be engaged without depressing the
brakeTo engage a gear while the vehicle is at
a standstill, always step on the brake.
Before leaving the vehicle, switch off
the engine. Have the system checked
as soon as possible.
Pinch protection system of the power
windows malfunctioningHave the system checked.
Pinch protection system of the electric
glass roof malfunctioningHave the system checked.
Cruise control system failed You can continue your journey. Have
the system checked.
Park Distance Control failed Have the system checked.
Bulb of exterior lighting system failed Have the exterior lighting checked as
soon as possible.
Low-beam headlamp failed Have the low beams checked as soon
as possible.
High-beam headlamp failed Have the high-beam headlamps
checked.
Adaptive Head Light failed
12Cause What to do