Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSAAB20039-3 CONVERTIBLE (9400) L4-2.0L TURBO (2.0 HOT)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWINITIAL INSPECTIONCHECKING FOR OPEN CIRCUITS/SHORT CIRCUITSGENERAL
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)
General
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)SECTION General
Checking For Open Circuits/Short Circuits General
Use a suitable instrument such as a multimeter.
An ohmmeter must not be used for testing components containing semiconductors, e.g. control modules and time delay relays, etc.
The power supply to the system being resistance tested must be disconnected because the instrument will apply a low measuring current to the circuit.
This will ensure that there is no current already present in the circuit so that a reliable reading can be obtained.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.