2000 Saab 9-5 Owner's Manual - Page 132

2000 Saab 9-5 Manual

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132 Starting and driving Limp-home mode The car's engine-management system includes a diagnostic function that checks numerous internal functions after the engine has been shut off. If a fault is detected in the throttle system, the engine-management system puts the throttle system into the limp-home mode. This limits idling control, disables the cruise-control system and limits the capacity of the A/C compressor. If the limp-home mode is in operation ("Engine malfunction" light on, see below) and the outside temperature is close to or below freezing, you may need to use some throttle on starting (some pressure on the accelerator). If the diagnostic system has detected a fault in the engine-management system, the "Engine malfunction" light on the main instrument panel will come on (see page 49), indicating that you should have the car checked as soon as possible by an authorized Saab dealer. Useful tips on cold climate starting If the engine has failed to start after several attempts in very cold weather, press and hold the accelerator down to the floor and run the starter for 5-10 seconds. This will prevent the engine being flooded (excessively rich fuel-air mixture). Now start the engine in the normal way - do not touch the accelerator. If the engine stalls immediately after starting (e.g. if the clutch was released too quickly), do not touch the accelerator when restarting the engine. Important considerations for driving The engine-management system in the Saab 9-5 is called Saab Trionic T7. The system manages the ignition, fuel injection and turbo boost pressure. The Trionic T7 system developed by Saab is an intelligent engine-management system designed to achieve optimum drivability under differing driving conditions. The system makes adjustments automatically, for instance, if the car is being driven at altitude (oxygen-deficient air), for different grades of fuel (AON 87-93) and for different load conditions. 1 Starting and driving • Refrain from using full throttle before the engine has warmed up (before needle in mid-range on temperature gauge). • A safety function prevents the engine from revving faster than 6,000 rpm by limiting the induction air. 2 Stopping the engine • Do not rev the engine immediately before switching it off - stop the engine when it is idling. 3 Regulating the boost pressure • The system is optimized for fuel with an octane rating of AON 90. One of the

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132
Starting and driving
Useful tips on cold climate starting
If the engine has failed to start after several
attempts in very cold weather, press and
hold the accelerator down to the floor and
run the starter for 5–10 seconds. This will
prevent the engine being flooded (exces-
sively rich fuel-air mixture).
Now start the engine in the normal way – do
not touch the accelerator.
If the engine stalls immediately after starting
(e.g. if the clutch was released too quickly),
do not touch the accelerator when restarting
the engine.
Limp-home mode
The car’s engine-management system
includes a diagnostic function that checks
numerous internal functions after the
engine has been shut off. If a fault is
detected in the throttle system, the
engine-management system puts the throt-
tle system into the limp-home mode. This
limits idling control, disables the cruise-con-
trol system and limits the capacity of the A/C
compressor.
If the limp-home mode is in operation
(“Engine malfunction” light on, see below)
and the outside temperature is close to or
below freezing, you may need to use some
throttle on starting (some pressure on the
accelerator).
If the diagnostic system has detected a fault
in the engine-management system, the
“Engine malfunction” light
on the main
instrument panel will come on (see page
49), indicating that you should have the car
checked as soon as possible by an autho-
rized Saab dealer.
Important
considerations for
driving
The engine-management system in the
Saab 9-5 is called Saab Trionic T7. The
system manages the ignition, fuel injection
and turbo boost pressure.
The Trionic T7 system developed by Saab
is an intelligent engine-management
system designed to achieve optimum driv-
ability under differing driving conditions.
The system makes adjustments automati-
cally, for instance, if the car is being driven
at altitude (oxygen-deficient air), for differ-
ent grades of fuel (AON 87–93) and for dif-
ferent load conditions.
1
Starting and driving
•
Refrain from using full throttle before
the engine has warmed up (before
needle in mid-range on temperature
gauge).
•
A safety function prevents the engine
from revving faster than 6,000 rpm by
limiting the induction air.
2
Stopping the engine
•
Do not rev the engine immediately
before switching it off - stop the engine
when it is idling.
3
Regulating the boost pressure
•
The system is optimized for fuel with an
octane rating of AON 90. One of the