Hyundai Yanmar TNV Series Manual page 50

A high-accuracy coolant temperature sensor will also be able to connect to terminal TFO (E16). The
measurement error of the high-temperature coolant temperature sensor will be approximately ±2°C at 0 to
110°C.
The high-accuracy coolant temperature sensor can double as a coolant temperature switch (121250-44901)
whose measurement accuracy is required to be 110±3°C. (The high-accuracy coolant temperature sensor is
now under development).
When the coolant overheat alarm is used as shown in Table 2-20, it recommended to used the high-
accuracy temperature sensor.
Accelerator sensor input
The Eco-governor uses the input voltage from the accelerator sensor or the input value through CAN
communication to calculate the target engine speed.
The input voltage from the accelerator sensor is converted into a speed value between the low idling speed
and the high idling speed. See Figure 2-16. By default, 0.7 V signal is converted into the high idling speed
and 0.3V signal into the low idling speed. Input voltages corresponding to the low and high idling speeds can
be adjusted provided that they are within the range of 0.2 to 4.6 V. If the input voltage from the accelerator
sensor is out of the above range, the E-ECU detects an accelerator sensor failure.
The input voltages can also be selected so that the gradient of the input voltage line segment between the
high and low idling speed points is reversed.
See "Application interface outline" for details on accelerator sensor setting.
E-ECU
5V
ADC
200k
ADC
100k
CANH
CANL
TNV Application Manual
Analog input
AVCC （E38）
APS （E35）
Accelerator sensor
(standard)
REAN （E37）
Backup accelerator
sensor (optional)
GND-A （E28）
CANH （E40）
V-ECU
CANL （ E39）
CAN input
Figure 2-16 Accelerator sensor input
CONTROL SYSTEM
Default analog input setting
High idling
3.0
Low idling
0.7
0.2
0 Input voltage [V]
Sensor error
Optional analog input setting
High idling
0.7
Low idling
3.0
0.2
0 Input voltage [V]
Sensor error
4.6
5.0
Sensor error
4.6
5.0
Sensor error
2-31