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Fault code
Meaning of the fault code
(Hex)
possible reason for fault detection
C3
Overtemp converter output
TCU measured a oil temperature at the
converter output that is the allowed
threshold
C4
S.C. to ground at joystick status
indicator
TCU detected a wrong voltage at the
output pin, that looks like a S.C. to vehicle
ground
Cable is defective and is contacted to
vehicle ground
Joystick status indicator has an internal
defect
Connector pin is contacted to vehicle
ground
C5
S.C. to battery voltage at joystick status
indicator
TCU detected a wrong voltage at the
output pin, that looks like a S.C. to battery
voltage
Cable is defective and is contacted to
battery voltage
Joystick status indicator has an internal
defect
Connector pin is contacted to battery
voltage
C6
O.C. at joystick status indicator
TCU detected a wrong voltage at the
output pin, that looks like a O.C. for this
output pin
Cable is defective and has no
connection to TCU
Joystick status indicator has an internal
defect
Connector pin has no connection to
TCU
Reaction of the TCU
No reaction
OP mode : Normal
No reaction
OP mode : Normal
No reaction
OP mode : Normal
No reaction
OP mode : Normal
3-32
Possible steps to repair
Cool down machine
Check oil level
Check temperature sensor
Check the cable from TCU to
joystick status indicator
Check the connectors from
joystick status indicator to TCU
Check the resistance* of joystick
status indicator
* See page 3-36
Check the cable from TCU to
joystick status indicator
Check the connectors from
joystick status indicator to TCU
Check the resistance* of joystick
status indicator
* See page 3-36
Check the cable from TCU to
joystick status indicator
Check the connectors from
joystick status indicator to TCU
Check the resistance* of joystick
status indicator
* See page 3-36
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