Saab 9000 - Page 191

188 Fault diagnosis
Diagnostic trouble codes P0505, P0506, P0507
Idle air control valve
· ·,
Symptom
of fault
Low, high or hunting idle speed. Idle speed sensitive
to load changes.
Conditions
• The speed of the car has exceeded 12 mph
(20 km/h} in this driving cycle.
• The car is stationary.
• Engine coolant temperature
>
60°
C (> 140° F}
• Throttle position sensor indicates idling speed
• Engine speed is above 1200 rpm or below
700 rpm
• Normal idling speed cannot be achieved
+30
230
...---••J67
Diagnostic help
589
µp
Operation of the idle air control valve can be checked
with ·the ISAT scan tool.
~
To ascertain the current degree of opening:
-
Select
"READ FUNCTIONS".
-
Select
"IAC
VALVE"
-
To
activate the valve:
-
Select
"ACTIVATE".
-
Select
"IAC
VALVE"
The valve will be activated for
1
O
sec.
Saab 9000
-·
'---._,,