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 DIAGNOSISINSTRUMENT PANEL, GAUGES AND WARNING INDICATORSDESCRIPTION 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
The main instrument unit is an integral unit and only the front glass can be replaced separately.
The main instrument unit has a 22-pin connector.
The control module receives information from its own sensors and connectors as well as from other systems. It processes and uses this information to control instruments and LEDs. Certain information is forwarded to the buses.
The control module stores DTCs in case of faults. After changing a control module, the new one must be programmed for spare parts and immobilizer. The mileage of the car that is stored in the old control module and shown on the display must be programmed into the new control module.
The instrument unit contains gauges that are controlled by their own control module using information from other systems as well as their own sensors. Warning and indicator lamps are controlled by their own sensors/connectors as well as control modules from other systems. All the warning, indicator and illumination lamps are light emitting diodes and cannot be replaced.
The odometer and trip meter display is a unit with two digital counters, a six-digit counter for the odometer and a four-digit counter for the trip meter.
The control module stores the mileage and shows it on the display.
Diagnostics
If an internal fault occurs in the main instrument unit's control module, diagnostic trouble code B1605 is set.
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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.