How to Troubleshoot a Saab ECU
The electronic control unit, or ECU, in your Saab controls a variety of vehicle systems. It also generates and stores error codes that are used to determine whether regular maintenance is required or whether there is a failure or malfunction in one of the Saab's critical vehicle systems (such as the fuel system, anti-lock braking system or the emissions system). Figuring out what is wrong with your vehicle, including whether your ECU is functioning properly, requires the use of an on-board diagnostic scanning tool, called an OBD tool. These tools are available from most auto parts stores.
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Instructions
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Locate the open OBD port under the dash of your Saab, to the left of the fuse panel.
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Plug the OBD plug into the OBD port on your Saab.
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Turn the ignition key to the "II" position and wait for the ECU to provide you with a code on the scan tool's digital display.
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Read your technical service manual (for the model and year of Saab you own) to determine what the numbered code refers to. If there is a problem with your ECU, this will also be reflected on your scan tool's digital readout. If the ECU is faulty, have it replaced by a professional mechanic.
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Tips & Warnings
For specific information about your Saab's ECU, consult the particular vehicle's manual (see Resources).
