Saab 9000 Service Manual page 155

-152 Fault diagnosis
Diagnostic trouble codes·P0301, P0302, P0303, P0304 (contd.)
4
4 Check the condition of the ignition discharge
module
- Remove the ignition discharge module from the
camshaft cover.
- Check visually:
• that the four rubber seals for the spark plugs
are in good condition. ·
• that no contact spring for the spark plugs is
missing or that spring travel is inadequate.
• the connector for moisture and corrosion.
Is the ignition discharge module OK?
I
YES
I
Continue with point 5.
I
NO
I
Rectify the fault and proceed to point 5.
5
•
5 Check the. spark plugs
- Remove the spark plugs and check their condi-
tion visually.
Are the plugs OK?
I
YES
I
Continue with point 6. '-'
I
NO
I
The electrode gap is wider than 1.4 mm or
is otherwise obviously incorrect. Change the
spark plugs and proceed to point 12.
Saab9000