check engine light Lancia Thesis 2008 Owner handbook (in English)

112
START-UP CHECKS
When turning the ignition key to
MARto start the engine, the system
starts monitoring the main car sys-
tems, the engine oil level (JTD ver-
sions only) and indicates the next
Scheduled Servicing.
Message
DIAGNOSIS IN PROGRESS
OKMeaning of the message
Diagnosis is being performed
Diagnosis is over
and all checked devices
are OK
Check stage
Warning light/symbol
y
z
Remarks
–
–

113
Engine oil level check (JTD versions only)
Indication is correct only if oil level has been checked with the car on a level surface.
If oil level is low, before topping up, check it by the proper dipstick as described in paragraph “Checking fluid levels”
in the “Car maintenance” chapter.
Warning light/symbol
Ç
k
Ñ
Note
If oil level is near or below
the MIN reference line
top up as soon as possible
Restore proper oil level
Use the dipstick to check that
the oil level is not exceeding
the MAX reference line
If oil level is exceed-
ing the MAX refer-
ence line contact a
Lancia Dealership as soon
as possibleMessage
ENGINE OIL LEVEL
LOW ENGINE OIL LEVEL
SWITCH OFF ENGINE
DO NOT PROCEED
MAXIMUM ENGINE
OIL LEVELMeaning of the message
Engine oil level
indication
Engine oil level is below
the minimum
Engine oil level
could exceed
the maximum

117
REAR SIDE BAGS
DEACTIVATED
(where provided)
The warning light comes on when
rear side bags are deactivated by the
relevant key switch.EOBD ENGINE
CONTROL SYSTEM
FAILURE
In normal conditions, turning the
ignition key to MAR, the warning
light turns on, but it should go off
when the engine has started.
If the warning light stays on or
turns on when travelling together
with message “ENGINE CONTROL
SYSTEM FAULT” on the multi-
function display:
Glowing steadily- means a fault
in the supply/ignition system which
could cause high emissions at the
exhaust, possible lack of perfor-
mance, poor handling and high con-
sumption levels.
In these conditions it is possible to
continue driving without however
demanding heavy effort or high
speeds. Prolonged use of the car with
the warning light on may cause
damages. Contact a Lancia
Dealershipas soon as possible.
The warning light goes off if the
fault disappears but it is however
stored by the system. FRONT PASSENGER
AIRBAG DEACTIVATED
The warning light comes
on when front passenger airbag is
deactivated by the relevant key
switch.
SEAT BELTS
The warning light comes
on with ignition key at
MARwhen the driver’s seat belt is
not fastened.
F
<
U
À
REAR FOG LIGHTS
The warning light comes
on when rear fog lights are
on.
AIRBAG SYSTEM
FAILURE
Turning the ignition key
toMAR, the warning light turns on
but it should go off after a few sec-
onds. The warning light comes on
with message “AIRBAG SYSTEM
FAULT” on the multifunction dis-
play to indicate an airbag system
failure.
4
¬
If the ¬warning light
does not turn on when
turning the ignition key to
MAR or if it stays on when travel-
ling, (together with message on
display) this could indicate a fail-
ure in safety retaining systems; un-
der this condition air bags or pre-
tensioners could not trigger in the
event of collision or, in a restricted
number of cases, they could trig-
ger accidentally. Stop the car and
contact Lancia Dealership to have
the system checked immediately.

Action
IMPORTANTIf the ¬warning light
does not turn on when turning the ig-
nition key to MARor if it stays on
when travelling, (together with mes-
sage on display) this could indicate a
failure in safety retaining systems; un-
der this condition air bags or preten-
sioners could not trigger in the event of
collision or, in a restricted number of
cases, they could trigger accidentally.
Stop the car and contact Lancia Deal-
ershipto have the system checked im-
mediately.
127
Outside temperature (ice hazard)
Warning light/symbol
❄
Message
WARNING ICE HAZARDMeaning of the message
Outside temperature is low
and there could be ice on the roadRemarks
Under certain conditions
(bridges, overbridges,
curves or road sections in
the shade, etc.) the air temperature
at ground level can be lower than
that at sensor level and therefore
there can be ice on the road
although this warning message is
not displayed
Message
AIRBAG SYSTEM
FAULT
AIRBAG SYSTEM
FAULT
SWITCH OFF ENGINE,
DO NOT PROCEEDMeaning of the message
Airbag system
failure
Airbag system
failure
Airbag
Warning light/symbol
¬

136
Brake pads
Warning light/symbol
d
Message
WORN BRAKE PADS
GO TO DEALERMeaning of the message
Brake pads are wornAction
Contact a Lancia
Dealership
IMPORTANTSince the car is fit-
ted with wear sensors for the front
brake pads, when changing them,
check also the rear brake pads
Engine coolant temperature
Warning light/symbol
u
è
Message
ENGINE COOLANT
TEMPERATURE HIGH
SWITCH OFF ENGINE,
DO NOT PROCEED
ENGINE COOLANT TEM-
PERATURE
SENSOR FAULT
GO TO DEALERMeaning of the message
Indicates excessive engine coolant
temperature
Engine coolant temperature sen-
sor failureAction
Turn the engine off and contact a
Lancia Dealership
Contact
aLancia Dealership
Engine coolant level
Warning light/symbol
n
Message
RADIATOR
LIQUID INSUFFICIENT
SWITCH OFF ENGINE
CHECK THE
HANDBOOKMeaning of the message
Engine coolant level
in reservoir
is near to the min. level
or is below the min. levelAction
Turn the engine off and
top up before restarting following
the instructions given in chapter
“Car maintenance”

141
Twilight sensor
Warning light/symbol
1
Message
TWILIGHT SENSOR
FAULT
GO TO DEALERMeaning of the message
The twilight sensor, for switching
on/off automatically the external
lights is faultyAction
Contact a Lancia
Dealership
Engine oil level sensor (JTD versions)
Warning light/symbol
èk
Message
ENGINE OIL
LEVEL SENSOR FAULT
GO TO DEALERMeaning of the message
Engine oil level sensor
failureAction
Contact a Lancia
Dealership
Message
ANTIPOLLUTION
FILTER
CLOGGED
SEE HENDBOOK
Meaning of the message
Anti-pollution filter cloggedAction
Keep the engine running until
the symbol disappears from
the display
Antipollution filter clogged (2.4 JTD 20VCAE version)
Warning light/symbol
è
Message
CHANGE
ENGINE OILMeaning of the message
Change engine oilAction
Restore proper oil level
(see “Checking levels” in section
“Car maintenance”)
Change engine oil (2.4 JTD 20VCAE version)
Warning light/symbol

174
Lift cover Aset at the driver's left
and press button Bto reset the fuel
cut-off switch.
Resetting the circuit breaker
Before resetting the cir-
cuit breaker, carefully
check for any fuel leaks or
damages to the car electric devices
(e.g.: headlights).Circuit breaker is located on the left
side of the boot, inside a box directly
set and connected to the battery pos-
itive terminal.
To reach the circuit breaker:
1) Open the tailgate.
2) Loosen knob A(fig. 130) and re-
move the battery cover B.
3) Press tabs A(fig. 131) and re-
move cover B.
4) Press button A(fig. 132) to reset
the circuit breaker.Initialising the control units of
the door locks, air conditioner
and ESP system
After resetting the circuit breaker, to
restore correct door locking, air con-
ditioning and ESP system, perform
the following operations:
1) Close the doors and the tailgate,
fit the key into the lock of one of the
front doors and perform a door cen-
tralised opening/closing cycle.
2) Start the engine and turn on the
compressor of the conditioner, setting
a lower temperature value than that
of the environment and check
whether the led on the disconnection
push button of the conditioner com-
pressoròis lit.
3) Turn the steering wheel one
fourth turn at least (the car can be at
standstill but the engine shall be run-
ning) and start running the car for a
few metres in a straight line until the
ESP warning light
áis off.
fig. 131
L0A0031b
fig. 132
L0A0347b

183
R - Reverse
Shift the lever to Rwith the car
stationary, the engine running idle
and the brake pedal pressed.
When the lever is at Rbackup
lights turn on and a buzzer will
sound for about 4 seconds to warn
other people that reversing is in
progress.
IMPORTANTEven with the lever
in position R, the reverse gear can-
not be engaged if the car speed is
higher than the established value.
When the speed is reduced, the
reverse gear can be engaged and it
remains engaged even if the car
speed overcomes that limit.N - Neutral
This is the position to be used when
the car must be pushed or towed.
D - Forward gear (automatic)
This is the position to be used when
all automatic gearbox functions are
required.
The electronic control unit controls
that the five gears are engaged auto-
matically according to car speed,
engine rpm, accelerator pedal posi-
tion and pressing speed, together
with the main driving conditions
such as hills, slopes, curves and
braking.
Indeed, the electronic automatic
gearbox is able to choose, according
to the type of driving adopted by the
driver, different programmes subdi-
vided into comfortable driving,
economy driving and sporty driving,
with shift points ranging between
low and high. Before leaving the car,
check that the electric
parking brake (EPB) is
on. Shift the lever to position P
even when the car is left with the
engine running.
In case of emergency (failures, flat
battery, etc.), it is possible to shift
the lever from position PtoN,Dor
Rby pressing lever A(fig. 141) set
under the gear lever mask. To reach
the lever, remove the press-fit odd-
ment compartment shelf Bin front
of the gearshift lever.
fig. 141
L0A0276b

191
To make ESP, ASR and
ABS systems work prop-
erly, the tyres must
absolutely be of the same brand
and type on all wheels, in perfect
conditions and, above all, of type,
brand and size specified. stantly changed and controlled in
the attempt to keep the driver’s
direction.
The ESP system considerably
increases the car safety in several
critical conditions and it is particu-
larly useful during overtaking, when
the grip conditions on the road bed
change.ASR FUNCTION (ANTISLIP
REGULATION)
General
The ASR function is part of the
ESP system and it checks the car
drive, taking action every time one
or both driving wheels slip, thus pre-
venting car instability and tyre wear.
On the basis of slipping conditions,
two different check systems are acti-
vated:
– if slipping affects both driving
wheels, as a result of the excessive
force transmitted, the ASR function
reduces the power supplied by the
engine;
– if slipping affects only one of the
driving wheels, the ASR function
automatically brakes the slipping
wheel, with an effect similar to the
self-locking differential.The action of the ASR function is
particularly useful in the following
conditions:
– internal wheel slipping when cor-
nering due to load dynamic varia-
tions and excessive acceleration;
– excessive power supplied to
wheels according to the road bed;
– acceleration on slippery ground,
covered with snow or ice;
– in case of grip loss on wet ground
(aquaplaning).
ASR function activation
The ASR function is activated
automatically whenever the engine
is started.
During driving it is possible to dis-
engage and engage this function by
pressing button A(fig. 142) on the
central console.
When the ASR function is on, sym-
bolVis lighted on the multifunc-
tion display together with the mes-
sage “ASR ON”.

193
The following table summarizes warning light indications according to the different operating conditions.
Operating or failure conditions
Engine start up (key turned to MAR)
Driving in
normal
conditions
Driving inconditions which
might lead to
slipping
ASR fault
ESP fault
System condition
Warning light check
ASR on
ESP on
ASR off
ESP on
ASR active
ESP active
ASR off
ESP active
ASR and ESP off
ASR on
ESP off ASR on
ASR off
manually
ASR on
ASR off
manuallyASR button warning light
On for about 3 seconds
Off
On
Off
On
On
OffESP warning light on
instrument panel
On for about 4 seconds
Off
Off
Flashing
Flashing
On
On
INITIALISING THE ESP SYSTEM CONTROL UNIT
Whenever the battery is electrically connected again or it is reloaded after being completely flat or after replacing one of
the protection fuses, to restore the correct operation of the ESP system, of the door locking, and of the air conditioning, it
is necessary to perform the initialisation operations contained in the paragraph “If battery is to be disconnected” in the chap-
ter “In an emergency”.