9-3 Coupe (9400) L4-2.0L Turbo (B204) (1999)
Check that the coolant does not contain impurities.
Diagnostic procedure
1. Checking vacuum hoses
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Check vacuum hoses between shut-off valve and inlet pipe.
Are the hoses free from defects?
YES
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Proceed to step 2.
NO
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Rectify vacuum hoses.
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Proceed to step 4.
2. Checking power supply.
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Turn the ignition key to the ON position.
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Unplug the connector: Solenoid, heater box: (581).
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Connect a test lamp 86 11 857 between pin 1 in the female connector and a good grounding point.