EA / CC / ISC control module position / task / design / function - GF30.20-P-3020D

ENGINE 104.945 up to 28.2.97 in MODEL 210.053

ENGINE 104.995 up to 28.2.97 in MODEL 210.055

ENGINE 104.942 in MODEL 124.008 / 028 / 029 / 088

ENGINE 104.992 in MODEL 124.032 / 052 / 066 / 092

ENGINE 104.943 as of 1.7.93 up to 31.5.96 in MODEL 129.058

ENGINE 104.991 as of 1.7.93 up to 31.5.96 in MODEL 129.063

ENGINE 104.944 as of 1.7.93 up to 31.5.96 in MODEL 140.028

ENGINE 104.994 as of 1.7.93 up to 31.5.96 in MODEL 140.032 /033

ENGINE 104.941 up to 31.7.96 in MODEL 202.028

Fig 1: Identifying EA/IC/ISC Control Module

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Purpose

Controlling the position of the throttle valve in line with the input signals.

Design

Voltage supply
Set value selection
Pedal maps
ASR/EBR signal processing
Position controller
Output stage
Emergency running
Cruise control / idle speed
Fault memory

Function Voltage supply

The following components are supplied with voltage by the EA control module with ignition ON:

Set value and actual value potentiometer
Actuator motor
Clutch
Cruise control switch
Idle speed contact switch
Safety contacts.

Set value selection

The following signals are input:

Idle speed input
Accelerator pedal input
ASR/EBR input
Maximum vehicle speed input
Cruise control input

The signal with the highest priority is determined.

Pedal maps

The appropriate map is actuated as a function of

Accelerator pedal position
Selector lever position (reversing)
Engine speed.

ASR/EBR signal processing

The ASR/EBR data are transmitted by the ASR control module through the CAN data bus to the EA control module. The signal with the highest priority is used for controlling the throttle valve. If no ASR/EBR signal exists, the position of the accelerator pedal determines the position of the throttle valve.

Position controller

Compares the position of the throttle valve and the position of the accelerator pedal. The position controller alters the position in line with the set and actual value.

Output stage

Operates the positioning motor in the actuator.

Emergency running

In the emergency running model, the output stage for the clutch and for the positioning motor is switched off. The throttle valve can now only be operated mechanically through the accelerator pedal.

Fault memory

All the system components are monitored by means of a watchdog facility in the EA control module. Faults are stored in the fault memory of the control module and are retained even if the battery is disconnected.

	EA/CC/ISC actuator arrangement/purpose/design/function		GF30.22-P-4010D
	Electronic accelerator function		GF30.20-P-3010D
	Electronic accelerator arrangement		GF30.20-P-3010-01K