CADILLAC DEVILLE 1998 7.G Owners Manual
Page 141 of 386
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Your braKe  system  may not  be  working  properly 
if  the  brake  system  warning  light 
is on.  Driving 
with  the  brake 
system warning  light  on  can  lead 
to 
an accident.  If  the  light is still  on  after  you’ve 
pulled 
off the  road  and  stopped  carefully,  have 
the  vehicle  towed  for  service. 
When  the  ignition  is on, the  brake  system  warning  light 
will  also  come  on  when  you  set your  parking  brake.  The 
light  will  stay  on  if  your  parking  brake  doesn’t  release 
fully.  If  it  stays  on  after  your  parking  brake  is fully 
released,  it means  you  have  a  brake  problem. 
Parking  Brake  Indicator  Light 
This  light  comes  on  when 
the  parking  brake  is set, and 
it  will  stay  on  if  the parking 
brake  does  not  fully  release. 
If  you  try  to  drive 
off with 
the  parking  brake  set, 
this 
light  will  remain  on. 
This  light  should  also  come  on  briefly  as 
you start  the 
vehicle.  If it doesn’t,  have  the  light fixed 
so it will  be 
ready  to remind 
you if  the  parking  brake  has  not  fully 
released.  For  more  information  on how  to  release  the 
parking  brake,  see  “Parking  Brake”  earlier  in 
this section. 
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Page 142 of 386
Downloaded from www.Manualslib.com manuals search engine Anti-Lock  Brake  System  Warning  Light 
ANTI - 
LOCK 
Digital Cluster 
LOCK 
ANT’- (e) 
Analog Cluster 
If the  light  stays on, twn the ignition  to OFF. Or,  if the 
light  comes  on  when  ,you’re  driving,  stop  as soon  as 
possible  and 
turn the  ignition off. Then  start the  engine 
again  to  reset  the system. 
If the light  still stays  on,  or 
comes  on  again  while  you’re  driving,  your  vehicle  needs  service. 
If the  regular  brake system  waming  light isn’t 
on,  you  still have  brakes,  but  you  don’t  have  anti-lock 
brakes. 
If the  regular  brake  system  warning  light  is also 
on, you  don’t  have  anti-lock  brakes  and  there’s a 
problem  with  your  regular  brakes. See “Brake  System 
Warning  Light”  earlier  in 
this section. 
With  the anti-lock  brake  system,  the  light(s)  will  come  The 
anti-lock  brake  system  warning  light  should  come 
on  when  you 
start your  engine  and  may  stay on for  on 
briefly  when  you turn the  ignition  key  to RUN. If the 
several  seconds.  That’s  normal.  light  doesn’t  come  on  then,  have it fixed so it 
will  be 
.ready 
to warn  you if there is a  problem. 
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Page 143 of 386
Downloaded from www.Manualslib.com manuals search engine Traction  Control  System  Warning  Light 
This warning light should 
come  on briefly  as you  start 
the  engine. 
If the  warning 
light  doesn’t  come  on  then, 
ready  to warn  you  if  there’s  TRACT^ 0 N 
CONTROL have  it  fixed so it will  be 
I’ a  problem. 
i If it  stays  on, or  comes  on  when  you’re  driving,  there 
i may  be  a  problem  with  your  traction  control  system  and 
your  vehicle  may  need  service.  When  this  warning  light  is  on,  the  system  will  not 
limit wheel spin. Adjust  your 
driving  accordingly. 
The traction  control  system  warning  light  may  come  on 
for  the  following  reasons: 
1 If there’s  a  brake  system  problem  that  is  specifically 
related  to  traction  control,  the  traction  control  system 
will 
turn off and  the  warning  light will  come  on. 
I 1 0 ‘If the  traction  control  system is affected  by  an 
engine-related  problem,  the system  will  turn 
off and 
the  warning  light  will  come  on. 
If the traction control  system  warning  light  comes  on 
and 
stays on  for an extended  period of time  when  the 
system 
is turned on, your  vehicle  needs  service. 
Engine Coolant Temperature Warning Light 
This light tells you  that  your 
engine  has  overheated.  You 
should  stop  your  vehicle 
’ ‘3 
and.turn  the  engine off as 
soon  as’possible. 
A warning 
chime  should 
also sound if 
this light  comes  on. 
As  a  check, 
the light  should come on for  a  few  seconds 
when  you  start  your  engine. 
Ih the section  “Problems on 
the  Road,” this manual  explains  what  to  do.  See “Engine 
Overheating” 
in the  Index.   
Page 144 of 386
Downloaded from www.Manualslib.com manuals search engine Engine  Coolant  Temperature  Gage 
Analog Cluster 
This  gage  shows the 
engine  coolant 
temperature.  If the  gage 
pointer  moves  into  the  red  area,  the engine  is  too  hot. 
That  reading  means  the  same  thing  as  the warning 
light 
-- the  engine  coolant 
has  overheated. 
In the 
section  “Problems  on  the 
Road,”  this  manual 
explains  what  to  do. See 
“Engine  Overheating”  in 
the  Index. 
Malfunction  Indicator  Lamp 
(Service  Engine  Soon  Light) 
Your  vehicle  is  equipped 
with  a  computer  which 
monitors  operation 
of the 
fuel,  ignition  and  emission 
control  systems. SERVICE 
ENGINE 
SOON 
This  system  is  called  OBD II (On-Board 
Diagnostics-Second  Generation)  and  is intended  to 
assure  that  emissions  are  at  acceptable  levels  for the  life 
of  the  vehicle,  helping  to  produce  a  cleaner 
environment.  The 
SERVICE ENGINE SOON light 
comes  on  and  a  chime  will  sound  to  indicate  that  there  is 
a  problem  and  service  is  required.  Malfunctions  often 
will  be  indicated  by  the  system  before 
any problem  is 
apparent.  This  may  prevent  more  serious  damage 
to 
your  vehicle.  This  system  is also  designed to assist  your 
service  technician  in  correctly  diagnosing 
any 
malfunction. 
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Page 145 of 386
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If you  keep  driving  your  vehicle  with  this  light 
on,  after  a  while,  your  emission  controls  may  not 
work 
as well,  your  fuel  economy  may  not  be  as 
good  and  your  engine  may  not  run  as  smoothly. 
This  could  lead  to  costly  repairs  that  may  not  be 
covered  by  your  warranty. 
This light  should  come  on, as a  check  to  show  you  it is 
working,  when  the  ignition  is on  and  the engine  is  not 
running. 
If the  light  doesn’t  come  on,  have  it repaired. 
This  light  will  also  come  on  during  a  malfunction  in  one 
of  two  ways: 
0 Light  Flashing -- A  misfire  condition  has  been 
detected.  A  misfire  increases  vehicle  emissions  and 
may  damage  the  emission  control  system  on  your 
vehicle.  Dealer  or  qualified  service  center  diagnosis  and  service  may  be  required. 
Light  On  Steady -- An  emission  control  system 
malfunction  has  been  detected  on  your  vehicle. 
Dealer  or  qualified  service  center  diagnosis  and  service  may  be  required. 
If the  Light Is Flashing 
The  following  may  prevent  more  serious  damage  to 
your  vehicle: 
Reducing  vehicle  speed. 
Avoiding  hard  accelerations. 
Avoiding  steep  uphill  grades. 
0 If  you  are  towing  a  trailer,  reduce  the  amount  of 
cargo  being  hauled 
as soon  as  it is  possible. 
If the  light  stops  flashing  and  remains  on  steady,  see “If 
the  Light 
Is On  Steady’’  following. 
If  the  light  continues  to  flash,  when  it  is  safe  to  do 
so, 
stop  the vehicle. Find  a  safe  place  to  park  your  vehicle. 
Turn  the  key  off,  wait  at  least 
10 seconds  and  restart  the 
engine.  If  the  light  remains 
on steady,  see “If the  Light 
Is  On  Steady’’  following.  If  the light  is  still flashing, 
follow  the  previous  steps,  and  drive  the  vehicle  to  your 
dealer  or  qualified  service  center  for  service. 
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Page 146 of 386
Downloaded from www.Manualslib.com manuals search engine If the Light Is On Steady Have  you  recentIy  changed  brands of fuel? 
You  may  be  able to  correct  the emission  system 
malfunction  by  considering  the  following: 
Did  you  recently  put  fuel into  your  vehicle? 
If 
so, reinstall  the fuel  cap,  making  sure  to  fully  install 
the  cap.  The diagnostic  system  can  determine  if the  fuel 
cap  has been  left 
off or  improperly  installed. A loose  or 
missing  fuel  cap  will  allow  fuel to  evaporate  into  the 
atmosphere. 
A few  driving  trips  with  the  cap  properly 
installed  should  turn  the light 
off. 
Did  you  just drive  through  a  deep  puddle  of  water? 
If so, your  electrical  system  may  be  wet.  The condition 
will  usually  be  corrected  when  the electrical  system 
dries  out.  A  few  driving  trips  should  turn  the light  off. 
Are  you  low  on  fuel? 
As your engine  starts  to  run  out  of fuel,  your  engine  may 
not  run  as  efficiently  as designed  since  small  amounts  of 
air  are  sucked  into the fuel  line  causing  a  misfire.  The 
system  can  detect  this.  Adding  fuel should  correct  this 
condition.  Make  sure  to  install  the fuel  cap  properly. 
It 
will  take  a  few  driving  trips  to  turn  the light off.  If 
so, be  sure  to  fuel  your  vehicle  with  quality  fuel  (see 
“Fuel”  in  the  Index).  Poor  fuel  quality  will  cause  your \
engine  not  to  run  as efficiently  as  designed.  You  may 
notice  this  as  stalling  after  start-up,  stalling  when  you 
put  the vehicle  into  gear,  misfiring,  hesitation  on 
acceleration  or  stumbling  on  acceleration.  (These 
conditions  may 
go away  once  the  engine  is  warmed  up.) 
This  will  be  detected  by  the  system  and  cause  the  light 
to  turn  on. 
If  you  experience  one  or more  of these  conditions, 
change  the fuel  brand  you  use. 
It will  require  at  least one 
full  tank  of the  proper  fuel to  turn  the  light  off. 
If  none  of the  above  steps  have  made  the  light turn 
off, 
have  your  dealer  or  qualified  service  center  check  the 
vehicle.  Your dealer  has  the proper  test  equipment  and 
diagnostic  tools  to  fix any  mechanical 
or electrical 
problems  that  may  have  developed. 
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Page 147 of 386
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This  light  tells  you if  there 
could  be  a  problem  with 
your  engine  oil  pressure. 
The  light  goes  on  when  you 
turn your  key  to RUN or 
START. It  goes off once  you  start  your  engine.  That’s  a 
check  to  be  sure  the  light  works. 
If it  doesn’t  come  on, 
be  sure 
to have  it fixed so it  will  be  there to warn  you if 
something  goes  wrong. 
When  the  light 
comes on  and stays on,  it means 
that  oil  isn’t  flowing  through  your  engine  properly.  You 
could  be  low 
on oil and you  might  have  some  other 
system  problem. 
/!1 CAUTION: 
Don’t  keep  driving if the oil pressure is low. If 
you  do, your  engine  can  become so hot that it 
catches  fire. You or others  could  be  burned. 
Check your oil as soon as possible  and have  your 
vehicle serviced. 
NOTICE: 
Damage  to  your engine  from  neglected oil 
problems  can  be  costly and 
is not  covered  by 
your  warranty. 
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PREMIUM  U.NLEADED FUEL 
ONLY 
1 
Analog Cluster Digital Cluster 
The fuel  gage  shows  approximately  how  much  fuel  is  in 
the  tank.  It  works  only  when  the  ignition  is 
in RUN. 
On the  digital  cluster, if the  fuel  level is within 
approximately 2 gallons (7.6 L) of  being full, the  letter F is 
shown. If the  fuel  level  is  less  than  approximately 
3 gallons (1 1.4 L) from being  empty,  the  letter E is  shown. 
If the  fuel  supply  gets  down  to  approximately 3 gallons 
(11.4 L), the  number “3” will be displayed  on  the  fuel 
gage,  and  the 
FUEL LEVEL LOW message  will  appear 
on  the  Driver  Information  Center 
@IC). (On  the  analog 
fuel  gage,  the 
FUEL LEVEL LOW message  will 
also appear.) 
Here  are a few  concerns  some  owners  have  had  about 
the  fuel  gage.  All 
of these  situations  are  normal  and  do 
not  indicate  that  anything  is wrong  with  the  fuel  gage: 
At  the  gas  station  the  gas  pump  shuts off before  the 
gage  reads 
E 
It  takes  more  (or  less) gas  to fill the  tank  than  the 
gage  said. For  example,  the  gage  read 
8 GALLONS 
(30 L), but it took more (or less) than  the tank’s 
remaining  capacity  to fill it. 
speed  up. 
The gage  may  change  when  you  turn, stop or 
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Page 149 of 386
Downloaded from www.Manualslib.com manuals search engine Fuel Data Panel Press  the AVG button  to  display  the  average 
mile-per-gallon  (AVG  MPG). 
You can  also  display  it in 
metric  units  by  pressing  the  ENG  MET  button. 
-1 
When  AVG MPG  is  selected,  the  total  distance  is 
divided  by  the  total  fuel  used. 
When  the  INST  button  (Instantaneous  Fuel  Economy)  is 
selected,  you  will  see  what  the  fuel  economy  is  at  that 
instant.  The  computer  takes  a  new  reading  twice  every 
second.  It  will  show  economy  up  to 
70 miles-per-gallon 
(or 
2 L per 100 km). 
To  reset  the  average  fuel  economy,  press  the  INFORMATION  button  until  the  AVG  MPG  is 
displayed  on  the  Driver  Information  Center  (DIC).  Press  and  hold  the 
RESET button  until  both  the  fuel data 
center  and  DIC  display  reads 
0.0. 
Digital Cluster 
For  vehicles  equipped  with  an  analog  cluster  (not  shown),  fuel  data  can  be  obtained  by pressing  the 
INFO button.  See  “Analog  Control  Buttons’’  later 
in this  section. 
The  fuel  data  panel  tells  you  all  you  need  to  know  about 
the  fuel  economy  and  how  far  you  can  travel  with  the 
he1  remaining.  The 
RANGE display  shows  how  far  the  computer  thinks 
you  can  travel  with  the  fuel that  is  in  the  tank.  The 
computer  does  not  know  what  driving  conditions  will  be 
like  for the  rest  of your  trip, 
so the  range is estimated 
based  on  the  recent  fuel  economy.  Therefore, 
the range 
reading  may  change  as  your  driving  habits  change.  Going  from  city  to  highway  driving  may  increase  the 
range  reading. 
If  the  range  display  shows 
LO, you  should stop for  fuel 
as soon as possible. 
2-78.   
Page 150 of 386
Downloaded from www.Manualslib.com manuals search engine Driver  Information  Center  (DIC) 
This  display  gives  you  the status of  many  of  your 
vehicle’s  systems.  The DIC  is  also  used  to  display  driver 
personalization  features  and  warningktatus messages. 
Digital  Control  Buttons  (DeVille  and 
DeVille  d’Elegance  Only) 
DISPLAY ON/OFF: Pressing  this  button  will  turn off 
the  Driver  Information  Center  (DIC),  Electronic  Climate 
Control  (ECC),  fuel  data  center,  the  fuel gage,  trip 
odometer  and  odometer.  While  the displays  are  off, 
pressing  the INFORMATION  button  will  only  turn  on 
the  DIC.  If the  TRIP  button  is  pressed  or the  fuel  level 
falls  below 
4 gallons (15.2 L),  all of the  displays  will 
come  back  on. 
ENGMET: You  can change  the  display  from English 
(miles)  to  metric  (kilometers)  by  pressing  this  button. 
The  same  button  also  changes  other  readings  (like 
temperature,  fuel and  odometer). 
TRIP: By  using  this  button,  you  can  tell  how  far  you’ve 
gone  since  you  last  set  the  TRIP back  to  zero.  To reset, 
press  and  hold  the  button  until  zeros  appear.  If  your 
vehicle  is  domestic,  the  trip  odometer  will  return  to  zero 
after  999.9  miles 
(1 609 km). If  your  vehicle  is 
Canadian,  the  trip odometer  will  return 
to zero  after 1 
999.9 km (1,242 miles). 
INFORMATION: Pressing  this  button  repeatedly  will 
display  the  MPG  AVG, 
GAL FUEL  USED, AVG MPH, 
ENGINE RPM, BATTERY  VOLTS,  COOLANT  TEMP 
and  OIL  LIFE  LEFT.