Specifications

82
Data Parameters Engine Parameters
ECU closes the purge control valves and monitors vacuum for 30 seconds to ensure there is no
decrease due to a minor leak.
TEMPOMAT SWITCH
TEMPOMAT SWITCH(ACCELERATE)
TEMPOMAT SWITCH(DECELERATE)
TEMPOMAT SWITCH(STORE)
Range: __________________________________________________________ ON/OFF
Used on ME10 and ME20 systems. These parameters indicate the state of the cruise control
switch. The display reads ON when the indicated switch is energized, and OFF if it is not.
THROTTLE VALVE ACTUATOR SIGN. 1
THROTTLE VALVE ACTUATOR SIGN. 2
Range: ________________________________________________________ 0 to 5.00 V
Used on ME27, ME28, and SIM4 systems. These parameters indicate throttle opening angle in
volts based on the input signal of the throttle valve actuator signals. Readings vary with throttle
opening. This drive-by-wire system has no mechanical throttle linkage. An electronic actuator
controls the throttle valve under different operating conditions to regulate idle speed, cruise
control operation, driving on the basis of accelerator position, traction control (Acceleration Slip
Regulation), Electronic Stability Program (ESP), and emergency running. The position of the
accelerator pedal is detected by two potentiometers that transmit input signals to the ECU.
Based on these signals, the ECU controls the electronic throttle actuator. One potentiometer is
the pedal value sensor and the other one is the electronic actuator. The electronic throttle
actuator potentiometer supplies a reference value for a plausibility check. In an emergency, if
one potentiometer fails, the system switches over to the second one. A quick plausibility check is
to add both actuator signal readings (SIGNAL 1 and SIGNAL 2) together at various throttle
positions. They should always add up the same value, usually between 4.5 to 4.9 volts.
THROTTLE VALVE ANGLE
THROTTLE VALVE POSITION
Range: __________________________________________________________ variable
Used on DM2, HFM, LH, ME10, ME20, ME27, ME28, and SIM4 systems. These parameters
indicate throttle opening angle in degrees based on the input signal of the throttle valve
potentiometer. Readings vary with throttle opening. Normal idle range is 0.3 to 2.5 degrees for all
engines except the 111. Normal idle range for the 111 engine is 1.8 to 3.5 degrees.
THROTTLE VALVE STOP LEARNED
Range: __________________________________________________________ YES/NO
Used on ME10, ME20, ME27, ME28, and SIM4 systems. This parameter indicates whether or
not the ECU has gone through the correct learn procedure for the throttle valve stop setting and
has adjusted the idle accordingly. The display reads YES if the ECU completed the throttle valve
stop learn procedure and successfully adjusted the idle speed. A reading of NO indicates the
ECU has not successfully executed the throttle stop learn procedure.
TIME SINCE START
Range: __________________________________________________________ variable
Used on ME10 systems. This is a clock that displays the elapsed time of engine running since
the last start. The timer resets with each key cycle.
TOP SPEED LIMITATION
Range: __________________________________________________________ ON/OFF
Used on ERE-EVE_ASF (IFI Diesel)). This parameter reads ON when the ECU has engaged the
Engine Maximum Speed Governing System. The control unit detects the engine speed and
adjusts the fuel rack to approximately 5400 RPM (no engine load).