ELECTRIC CIRCUIT
5 - 42
CASE TRAINING CENTER
AUGUST 2000
Water temperature gauge
1) Circuit configuration
CM00F007
1. Instrument panel
2. Main electronic control box
3. Engine electronic control box
4. Moteur
5. Water temperature sender
6. Water temperature gauge
7. Series connection
8. CAN connection
2) Operation
A. The engine water temperature sender (5) sends a
signal to the engine electronic control box (3).
B. The engine electronic control box (3) send the
converted signal to the main electronic control box (2)
via the CAN connection (8).
C. The main electronic control box (2) calculates the
number of bars to display and transmits the
information to the water temperature gauge (6) via
the series connection (7).
D. When the 8th bar on the water temperature gauge is
displayed, the message “OVER HEAT” appears on
the instrument panel control screen (1) and the
audible warning device sounds.
1
6
7
2
8
3 4
5
8
7
6
5
4
3
2
1
40 50 60 70 80 90 100 110
105
ON
OFF
103
ON
OFF
100
ON
OFF
97
ON
OFF
82
ON
OFF
77
ON
OFF
50
ON
OFF
Water temperature (°C)
Water temperature
gauge bar
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