Saab 9000 - Page 157

154 Fault diagnosis
Diagnostic trouble codes P0301, P0302, P0303, P0304 (contd.)
7
7 Check the compression
- Check the compression of each cylinder.
Is compression OK?
I
YES
I
Change all spark plugs and continue with
point 8.
I
NO
I
Continue fault diagnosis as described in
Service Manual 2: 1 "Basic engine".
8
[(
__ ]]
0000
ODDO
0000
0000
O
□
c=J
1!!3+
8 Check
the
power
supply (B+) of the injector
concerned
- Check the voltage by connecting the test lamp
to pin 1 of the relevant injector's connector and
8-.
- Connect an
ISAT
scan tool.
- Select "ACTIVATE".
-Select "INJECTOR
CYL
1",
CYL 2, CYL 3 OR
CYL4.
The test lamp should light up for 1 O seconds during
activation.
Is the test lamp on?
I
YES
I
Continue with point 9.
I
NO
I
The fault is in the lead between pin 1 and
crimped connection J67. Rectify the fault
and proceed to point 12.
_ Saab9000
..