Saab 9000 - Page 232

Fault diagnosis 229
Dips in idling speed and engine rpm (contd.)
5
5 Check the engine load
0000
0000
0000
0000
ooc=i
- Check that the Trionic control module receives
the correct input signals to compensate for any
changes in engine load.
·
Depending on the trouble, continue fault diag-
nosis with:
• Fault diagnosis, DRIVE, on page 256.
• Fault diagnosis, other trouble. Continue as
described below.
- Try changing the idle air control valve.
- Check whether the idle air control valve works.
Do engine revs still dip?
I
YES
I
Continue with point 6.
I
NO
I
Change the idle air control valve and then
continue with point 6.
Saab 9000
AC?
DRIVE?
I