Fault diagnosis 191
Diagnostic trouble codes
Pos·os, ·P0506, P0507
{contd.)
3~
3 Check the lead between the idle air control
valve and the control module
- Switch off the engine.
- Turn the ignition switch to the ON position and
then back to the OFF position.
- Connect
the ·
test
lamp to pin 1 of the female
connector and battery positive (B+ ).
The test lamp should light up.
"""
Remove
fuse 23. The test lamp should now
shine weakly or go out altogether.
Has the test lamp gone out or nearly so?
I
YES
I
_Change
the
idle air control valve and conti-
nue with point 4.
I
NO
I
Check the lead between pin 1 of the connec-
tor and pin 49 of the control module for conti-
nuity and shorting. Rectify if necessary.
Then continue with point 4.
Saab9000
I
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