Saab 9000 - Page 248

Main relay {contd.)
Diagnostic procedure
1 Check the operation of the main relay
- Connect an ISAT scan tool.
- Ignition switch in ON position.
- Select "ACTIVATE".
- Select
"MAIN
RELAY".
The main relay is activated for 1
O
seconds at a fre-
quency of 1 Hz. If a longer activation time is required,
the command will have to be repeated.
- Listen for the sound of the main relay and idle
air control valve working.
They should both click at a frequency of 1 Hz ( once
a second).
Does only the main relay click?
I
YES
I
Continue with point 2.
I
NO
I
Neither the main relay nor the idle air control
valve clicks.
Continue with point 4.
Saab 9000
Fault diagnosis 245
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