Saab 9000 - Page 217

214 Fault diagnosis
Engine fails to start, quick test
Diagnostic procedure
1 Check the fuses
- Check the following fuses:
• 23 (control
m·odule
supply,
+30 circuit)
• 13 (control module supply, +15 circuit)
• 14 (fuel pump relay supply to fuel pump)
Are the fuses intact?
I
YES
I
Continue with point 2.
I
NO
I
Change any blown fuses.
Then
conUnue
with
point 2.
'\\\Ill//
........
/
CHECK ENGINE
/
........
////1\\\,
2 Check the CHECK ENGINE lamp (MIL)
-
~gnition
on.
-
Check the fuel level.
- Check that the CHECK ENGINE lamp
(MIL)
lights up and stays on.
Is the CHECK ENGINE lamp on?
I
YES
I
The control module is activated.
INO
I
No control module supply (+15 circuit).
INO I
The CHECK ENGINE lamp- (MIL) shines
weakly or flickers. No control module supply
(+30 circuit) or ground connection.
When this fault occurs a buzzing sound can
also be heard from the main and fuel pump
relays at the same time as the tachometer
needle moves round the dial.
Saab9000