DIAGNOSTIC - SELECTION
4 - 3
CASE TRAINING CENTER
AUGUST 2000
2c. Machine condition CHK6(was CHK2’’)
1) When the return to idle switch and the starter motor
switch are both actuated simultaneously, without
starting the engine, automatic checking for short-
circuits in output transistors is initialised.
2) If the message "ELEC. PROBLEM" is displayed on
the control screen, return to screen CHK2 and press
the travel mode switch for 10 seconds. The CHK2"
screen will be displayed and the windows TR1 and
TR2 will show any short-circuits on the corresponding
lines.
NOTE: If there is no message and the audible warning
device sounds 6 times, that means that there is no
defect.
Example: In the screen opposite, window TR1 shows
a short-circuit at the travel second speed control
transistor output.
3) When the starter motor switch is in the OFF
position, the results are erased.
No short-circuit = 0, short-circuit = 1
3. Machine condition CHK3
Pressure switch and electronic control box switch inputs: 0 = OFF, 1 = ON
CHK MODE II H TR1 0010
2
R 0080 % TR2 0000
FT 0040 C TR3 0000
TV 0100 % TR4 0000
CHK MODE II H SW4 0000
3
SW1 0000 SW5 0000
SW2 0000 SW6 0000
SW3 0100 SW7 0000
SW1 to SW3 Electronic control box pressure
switch inputs
SW4 to SW7 Electronic control box switch
inputs
SW10000 SW20000 SW30000
Pilot pressure Engine oil pressure Battery charge
Travel pilot pressure Coolant solution level X
Swing pilot pressure Safety valve pressure X
Hammer pilot pressure X X
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