Specifications

Data Parameters Engine Parameters

systems, the data parameter display ranges from 0.680 to 1.320; on ME27 systems, from 0.750

to 1.280.

PEDAL VALUE SENSOR SIGNAL 1

PEDAL VALUE SNSR REF.POT.MTR R1

PEDAL VALUE SENSOR SIGNAL 2

PEDAL VALUE SNSR REF.POT.MTR R2

Range: ________________________________________________________ 0 to 5.00 V

Used on ME10, ME20, ME27, ME28, and SIM4 systems. These parameters display the ECU

input signals from the pedal position and electronic throttle actuator sensors. This is a

drive-by-wire system with no mechanical throttle linkage. An electronic actuator controls the

throttle valve to regulate the idle speed, cruise control operation, driving on the basis of

accelerator position, traction control system, Electronic Stability Program (ESP), and emergency

running. The accelerator pedal position is detected by two potentiometers that transmit input

signals to the ECU. Based on these signals, the ECU controls the electronic throttle actuator.

One pot is in the pedal value sensor and the other is in the electronic actuator. The throttle

actuator supplies a reference value for a plausibility check. If one pot fails, the system switches

to the other one. The voltages from both pots should change simultaneous with throttle change.

The display should read between 0.2 and 0.5 volts (V) at idle. Typical normal readings at idle for

Sensor 1 are 0.20 to 0.50V; Sensor 2 are 0.10 to 0.40V. At wide open throttle (WOT), typical

normal readings for Sensor 1 are 4.30 to 4.80 V; Sensor 2 are 2.10 to 2.50V.

PEDAL VALUE

Range: ________________________________________________________ 0 to 5.00 V

Used on HFM systems. This parameter displays the ECU input signal from the pedal position

sensor. Voltage varies according to operating conditions. The HFM system does not use a drive

by wire electronic throttle actuator. Instead, a mechanical throttle linkage connects to an

electronic actuator on the throttle body. The actuator has an integral clutch that overrides the

mechanical linkage under certain conditions. The System controls idle, cruise control, and

accelerator slip regulation (ASR), which is controlled by the EA/CC/ISC module.

PRESSURE CONTROL

Range: __________________________________________________________ ON/OFF

Used on ERE_EVE_ASF (IFI Diesel). This parameter should read ON whenever turbo boost is

controlled by the ECU. The boost pressure transducer is actuated by the ECU with variable

current which regulates the boost pressure vacuum unit. The pressure control valve is closed by

the boost pressure control valve vacuum transducer through the vacuum unit which directs

exhaust gas against turbine wheel.

PURGE CONTROL

Range: __________________________________________________________ ON/OFF

Used on ME27 and ME28 systems. This parameter indicates whether the purge control valve is

on or off.

PURGE FACTOR F 1

PURGE FACTOR F 2

PURGE FACTOR F 3

PURGE FACTOR F 4

Range: _________________________________________________________ 0 to 100%

Used on HFM systems. These parameters display the opening of the canister purge valve as a

percentage.