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 MANUALSSMART2009FORTWO BRABUS COUPE (451.333) L3-1.0L (132.930)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCRANKCASE PRESSURE SENSORDESCRIPTION AND OPERATION
2009 Smart ForTwo BRABUS Coupe (451.333) L3-1.0L (132.930)
Crankcase Pressure Sensor: Description and Operation
2009 Smart ForTwo BRABUS Coupe (451.333) L3-1.0L (132.930)SECTION Description and Operation
GF07.04-P-6010MCC Component Description For Crankshaft Position Sensor
L5 Crankshaft position sensor
Location
The crankshaft position sensor is located at the bottom right on the cylinder crankcase.
Task
The crankshaft position sensor detects the crankshaft position and motor speed.
L5 Crankshaft position sensor
a Tooth front edge
b Tooth rear edge
c Gap (2 teeth missing)
h Signal of crankshaft position sensor
l Screened signal line
s Coil (inductive)
u Signal voltage
Function
The front edge of a tooth on the clutch plate generates a positive voltage pulse and the rear edge generates a negative one. The distance from the positive to the negative voltage peak corresponds to the length of a tooth.
The gap produced by 2 missing teeth results in no voltage being generated in the crankshaft position sensor. This gap is used for detecting the TDC position of cylinder 1.
The distance between the crankshaft position sensor and the teeth of the drive plate is specified by the installation position.
RENDER: 1.0x
NO RELATED
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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.