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 MANUALSSAAB20009-3 CONVERTIBLE (9400) L4-2.0L TURBO (B205)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHDESCRIPTION AND OPERATIONSELECTOR LEVER POSITION SENSOR - STARTING INTERLOCK SWITCH
2000 Saab 9-3 Convertible (9400) L4-2.0L Turbo (B205)
Selector Lever Position Sensor - Starting Interlock Switch
2000 Saab 9-3 Convertible (9400) L4-2.0L Turbo (B205)SECTION Selector Lever Position Sensor - Starting Interlock Switch
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On cars with automatic transmission, the starting interlock switch (77) is integrated with the selector lever position sensor.
The switch (77) pins 1 and 5 are used to control the starter relay.
Switch pin 1 is supplied with B+ via fuse 36.
In positions P and N. the switch 77 is closed and B+ is fed via the starter relay to TWICE, which grounds the input if the criteria have been fulfilled (correct key).
In all other gear positions the switch is open, i.e. the starter relay is not supplied with current.
RENDER: 1.0x
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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.