Fault diagnosis 179
Diagnostic trouble code P0441 (contd.)
3
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3 Final check:
- Clear the diagnostic trouble code.
- Perform a driving cycle:
• Ignition switch in the ON position, A/C
switched off and temperature sensor un-
plugged from the EDU so that the radiator fan
runs continuously.
• Start the engine and run it at idling speed until
the temperature of the coolant exceeds 60°C
(140°F) or for at least 1 minute if this tempera-
ture is reached earlier.
• Depress the accelerator a second or two and
then run the engine at idling speed for 30 se-
conds. Repeat three times.
- Evaluation of the driving cycle:
- Connect an ISAT scan tool.
- Select "READ ON/OFF".
- Select "DIAGNOSTIC STATUS".
- Select "EVAP"
Pxxxx?
0000
◊
0000
30sec 30sec 30sec 30sec
O O O O
0000
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----;
Does the ISAT scan tool show "NOT READY"?
I
YES
I
Repeat the driving cycle.
I NO
I Check whether the diagnostic . trouble code
has recurred.
Has the diagnostic trouble code recurred?
I
YES
I
Proceed to page 282.
I NO I
The remedial measure taken was correct.
- Plug the temperature sensor into the EDU.
- Clear the diagnostic trouble code for the tem-
perature sensor in the EDU.
Saab9000
I