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ELECTRIC CIRCUIT
CASE TRAINING CENTER
AUGUST 2000
Automatic engine warm-up
1) Circuit configuration
CS00F515
1. Instrument panel
2. Return to idle control
3. Main electronic control box
4. Pilot pressure switch
5. Travel pilot pressure switch
6. Engine throttle control
7. Engine electronic control box
8. Engine
9. Engine coolant temperature sender
10. Electronic acceleration
2) Operation
1. When the engine is started, if the coolant solution temperature is equal to or lower than 50°C, the main
electronic control box (3) transmits an automatic engine warm-up signal to the engine electronic control box
(7).
2. The engine electronic control box (7) manages the automatic engine warm-up.
3. Automatic engine warm-up conditions:
- Coolant solution temperature (9) equal to or lower than 50°C.
- Pilot pressure switch (4) and travel pilot pressure switch (5) not on.
- Return to idle control (2), not on.
- Position of engine throttle control (6), unchanged.
- Engine speed not higher than 1800 rpm for 3 minutes.
4. If one of the above conditions is not present, the automatic engine warm-up does not operate. To perform the
engine warm-up again, the engine has to be shut down and re-started.
5. When automatic engine warm-up is operating, "AUTO WARM UP" is displayed on the control screen (LCD).
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