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 DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - BRAKES AND TRACTION CONTROLTRACTION CONTROL MODULELOCATIONSGF42.45-P-5118MCU ESP CONTROL UNIT, COMPONENT DESCRIPTION
2009 Smart ForTwo BRABUS Coupe (451.333) L3-1.0L (132.930)
GF42.45-P-5118MCU Esp Control Unit, Component Description
2009 Smart ForTwo BRABUS Coupe (451.333) L3-1.0L (132.930)SECTION GF42.45-P-5118MCU Esp Control Unit, Component Description
GF42.45-P-5118MCU ESP Control Unit, Component Description
1 Hydraulic unit
N47-5 ESP control unit
Location
The ESP control unit is located on the hydraulic unit on the vehicle underfloor.
Task
The ESP control unit controls the following systems:
^ Electronic Stability Program (ESP)
^ Acceleration Slip Regulation (ASR)
^ Engine braking regulation (EBR)
^ Antilock brake system (ABS)
^ Electronic brake force distribution (EBV)
Communication and influence of ESP control unit on other systems in the vehicle:
^ The ESP control unit influences the engine management and power transmission in the case of an ESP control.
^ For driver information the control unit actuates the instrument cluster via the Controller Area Network (data bus/CAN bus) (CAN)A1), the instrument cluster actuates the ABS indicator lamp (A1e17) and ESP warning lamp (A1e41).
Direct entries
^ Tml. 15
^ Circuit 30
^ Circuit 31
^ Left front rpm sensor (L6/1)
^ Right front rpm sensor (L6/2)
^ Left rear rpm sensor (L6/3)
^ Right rear rpm sensor (L6/4)
^ Stop light switch (S9/1)
^ Brake fluid indicator switch (S11)
^ Parking brake switch (S12)
Voltage supply
^ Yaw rate, lateral and longitudinal acceleration sensor (B24/15)
^ Steering angle sensor (N49)
CAN signals
The ESP control unit is a CAN subscriber and receives signals from the following sensors:
^ Yaw rate, lateral and longitudinal acceleration sensor
^ Steering angle sensor
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.