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 DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSALARM MODULEDESCRIPTION AND OPERATIONDETAILED DESCRIPTIONCONTROL MODULE
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)
Control Module
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)SECTION Control Module
Control Module
General
The control module for the TWICE system is placed under the left-hand front seat. It is connected to the components used in the system via a 70 pin connector.
The task of the control module, as a central unit, is to monitor and control the components and functions in the system as follows:
- TWICE - controls the power supply to the various functions in the system. The power is supplied direct via the control module and via external relays, which are grounded through the control module.
- TWICE - is connected to the instrument bus (I-bus) and thus receives, processes and sends out information (communicates) via the bus with other car systems (control modules) connected to the bus.
- TWICE - in the event of a fault stores the diagnostic trouble codes, which can be read using the diagnostic instrument (Tech 2).
- TWICE - is programmable. Certain functions can be programmed to comply with legislation, market, customer demands and the car's equipment.
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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.