Saab 9000 - Page 153

150 Fault diagnosis
Diagnostic trouble codes P0301, P0302, P0303, P0304 (contd.)
2
[l
1]
0000
0000
0000
0000
OOc=J
2 Check the trigger lead of the ignition coil con-
cerned
- Unplug the ignition discharge module's 10-pin
connector.
- Ignition switch in ON position.
- Connect the test lamp to pin 1
o
and the trigger
lead of the ignition coil in question, see table be-
low.
- Then activate the ignition coil concerned by
means of an ISAT scan tool command.
Trigger lead, 10-pin connector, pin No.
cylinder No.
1 2
2 3
3 4
4 5
N
i
0
The test lamp should light up for 10 seconds, during
which time it should flicker (go out repeatedly for ex-
tremely brief periods). In the event of uncertainty, re-
peat the command.
Does the test lamp light up and start flicker-
ing?
I
YES
I
Change the ignition discharge module and
proceed to point 12.
I
NO
1.
The test lamp does not light up or remains
on continuously. Continue with point 3.
Saab9000