Shift Up Lamp (Cars With Manual Gearbox) - Saab 9000 Service Manual

62 Technical Description
SHIFT.UP lamp (cars with manual gearbox)
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The lamp is situated in the main instrument display
panel and supplied with current from the
+
15 circuit.
It is controlled from pin 55 of the engine control mod-
ule and tested for 3 seconds when the ignition is
switched on.
A combination of light engine load and high engine
revs when the car is being driven will cause the lamp
to light up. This does not apply when 5th gear is en-
gaged.
The lamp lights up regardless of engine load when
engine speed approaches 6000 rpm.
The ECM calculates the gear position on the basis of
engine speed and vehicle speed.
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Saab 9000
589
H70-1
µp
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