C 280 (202.029) V6-2.8L (112.920) (1999)
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Wheel Speed Outputs And Speed Status Signal Outputs
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Wheel Speed Output: The ESP control module supplies the current wheel speed of each wheel for systems which need a wheel speed
signal.
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Speed Status Signal Output: The ESP control module supplies the speed status signal for systems which need information on the current
vehicle condition (vehicle stationary, vehicle moving, speed sensor defective).
Indicator Lamp Actuation
The signals from the brake pad wear contacts and the parking brake are registered by the ESP control module. They are transmitted to the
instrument cluster via a serial data bus together with the signals for the ABS and ESP MIL and warning lamps and on vehicles with CAN
connection on the instrument cluster via a CAN data-bus
GF42.35-P-4500-01A Function of ETS Control Module
GF42.35-P-4500-01A Function Of ETS Control Module
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with CODE (212a) Electronic traction system (ETS)
To adapt to the various engine variants, manual or automatic transmission and different versions of the rear axle brake calipers, control modules must be
coded with the Hand-Held Tester after installation in the vehicle variant concerned.
The ETS/SPS control module is divided up functionally as follows:
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Signal conditioning
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Logic section
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Safety circuit
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Additional functions
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Signal conditioning
The following input signals are conditioned for the logic section:
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4 speed sensors
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Stop lamp switch, 4-pin
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Terminal 61
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Logic section
The conditioned input signals are processed in the logic section and converted into output signals.
The logic section is divided up functionally as follows:
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ETS control mode
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Starting-off control logic (manual transmission)
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Temperature monitoring
ETS control mode
The control mode for brake intervention on one side is recognized from the vehicle speed and ETS slip recognition between the left and right drive
wheel.
Switching on condition: Speed difference between the left and right rear wheel > 4 km/h
