JAC HFC4DA1-2C - Page 234

IP Instrument
Instrument
Instrument
Instrument and
and
and
and Warning
Warning
Warning
Warning System
System
System
System
- 26 -
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Test
Test
Test
Test
Function
Function
Function
Function description
description
description
description of
of
of
of the
the
the
the combination
combination
combination
combination instrument
instrument
instrument
instrument
1. Water temperature gauge
It processes water temperature signals received by
the instrument, converts these signals to voltage
signals firstly then to digital signals via AD and
controls the water temperature stepping motor for
the indication of corresponding values.
2. Tachometer
It carries out the algorithmic-processing for signals
sent by the generator, controls the speed stepping
motor for the indication of corresponding values.
Corresponding speed signal frequency for every
1000R/MIN is 260HZ.
3. Speedometer
It carries out the algorithmic-processing for signals
sent by the vehicle speed sensor and controls the
vehicle speed stepping motor for the indication of
corresponding values.
4. Fuel gauge
It processes resistance signals sent by the fuel
sensor, converts these signals to voltage signals
firstly then to digital signals via AD and controls
the fuel stepping motor for the indication of
corresponding values.