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.
2003 Saab 9-3 Vector, AutomaticFACTORY OEM SERVICE PROCEDURE
Main relay: Diagnostics
- If there is an open circuit or short circuit to ground, diagnostic trouble code P1652 will be generated.
- If there is a short circuit to B+, diagnostic trouble code P1653 will be generated.
- If the current to control module pin 1 is missing, diagnostic trouble code P1640 will be generated, the throttle will close and the engine will stop.NOTE: In Trionic T7, the main relay is always active when the ignition on. The current from the main relay can be read with the diagnostic tool.
Factory Service Tools
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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.
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