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 DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLEDESCRIPTION AND OPERATIONKICKDOWN FUNCTION
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)
Kickdown Function
2003 Saab 9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT)SECTION Kickdown Function
Component Diagram:
Circuit Diagram:
Kickdown Function
Trionic has a pedal position sensor that provides information on the position of the accelerator pedal. When the angle of the pedal exceeds a predetermined value, the Trionic sends the information "KICKDOWN ON" over the bus, value ON/OFF.
The control module uses the signal to control the shifting points so that maximum performance is obtained. The kickdown function is available in all shifting programs.
Diagnostics
A diagnostic trouble code will be generated primarily in Trionic if the function is faulty.
When bus communication with Trionic ceases, diagnostic trouble code P1921 is generated and the transmission goes into limp-home mode.
Inaccurate information on the bus causes diagnostic trouble code P1971 to be generated. Depending on the fault, the TCM may activate the emergency operation program (limp-home mode).
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.