Saab 9000 - Page 218

Fault diagnosis 215
Engine fails to start, quick test (contd.)
3 Check the main relay
Since the main relay supplies the injectors and igni-
tion discharge module with power,
check
its opera-
tion as follows:
- Ignition switch in the OFF position.
- Connect the test lamp to pins
1 O
and
6
of the
ignition discharge module's connector.
- Remove fuse
23
for
5
seconds.
- Insert fuse
23.
- Ignition switch in the ON position - check that
the test lamp lights up for about 6 seconds and
then goes out.
Does
the
test lamp light up for 6 seconds?
I
YES
I The main relay is OK.
I
NO
I ·
See .
"Fault diagnosis, main
relay"
on
pa-
ge 244.
4 Run the starter motor when the test lamp has
gone out. ·
The test lamp should then light up again.
Test lamp on?
I
YES
I The crankshaft position sensor is OK.
I
NO
I
The control module receives no information
from the crankshaft position sensor, see
"Fault diagnosis, crankshaft position
sen"'.
sor"
on
page
162.
Saab9000
I