Wagan 2004 Owner's Manual download pdf (Page 151)

151Starting and driving

Limp-home mode

The engine management system has a

diagnostic feature that continually checks a

number of internal functions. If, for example,

a fault is detected in the throttle valve, the

engine management system will go into

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 (CHECK ENGINE)”

light on, see below) and the outside temper-

ature 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 (CHECK ENGINE)”

light on the main instrument panel will

come on (see page 57), indicating that you

should have the car checked as soon as

possible by an authorized 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. The 2.3 Turbo

and 2.3 T are optimized for AON 93.

NOTICE

If the CHECK ENGINE warning light

starts to flash, ease off the accelerator

slightly. If the light does not cease to flash

within 5 seconds, stop the car in a suit-

able place as soon as possible and turn

off the engine. The car must be towed to

an authorized Saab dealer.

If the CHECK ENGINE warning light

flashes, it indicates that the engine is mis-

firing which can result in damage to the

catalytic converter.

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