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3-64
Fault code
(Hex)
Meaning of the fault code
possible reason for fault detection
Reaction of the TCU
Possible steps to repair
76
O.C. at clutch K2
The measured resistance value of the
valve is out of limit
Â
Cable/connector is defective and has no
contact to TCU
Â
Regulator has an internal defect
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
余
余
余
余
Check the cable from TCU to the
gearbox
Check the connectors from gearbox
to TCU
Check the regulator resistance*
Check internal wire harness of the
gearbox
* See page 3-74
77
S.C. to battery voltage at clutch K3
The measured resistance value of the
valve is out of limit, the voltage at K3 valve
is too high
Â
Cable/connector is defective and has
contact to battery voltage
Â
Cable/connector is defective and has
contact to another regulator output of
the TCU
Â
Regulator has an internal defect
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
余
余
余
余
Check the cable from TCU to the
gearbox
Check the connectors from gearbox
to TCU
Check the regulator resistance*
Check internal wire harness of the
gearbox
* See page 3-74
78
S.C. to ground at clutch K3
The measured resistance value of the valve
is out of limit, the voltage at K3 valve is too
low
Â
Cable/connector is defective and has
contact to vehicle ground
Â
Regulator has an internal defect
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
余
余
余
余
Check the cable from TCU to the
gearbox
Check the connectors from gearbox
to TCU
Check the regulator resistance*
Check internal wire harness of the
gearbox
* See page 3-74
79
O.C. at clutch K3
The measured resistance value of the
valve is out of limit
Â
Cable/connector is defective and has no
contact to TCU
Â
Regulator has an internal defect
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
余
余
余
余
Check the cable from TCU to the
gearbox
Check the connectors from gearbox
to TCU
Check the regulator resistance*
Check internal wire harness of the
gearbox
* See page 3-74
7D
S.C. ground at engine derating device
Â
Cable is defective and is contacted to
vehicle ground
Â
Engine derating device has an internal
defect
Â
Connector pin is contacted to vehicle
ground
Engine derating will be on
until
TCU power down even if
fault vanishes (Loose
connection)
OP mode : Normal
余
余
余
ö
Check the cable from TCU to the
engine derating device
Check the connectors from engine
derating device to TCU
Check the resistance* of engine
derating device
Not used
* See page 3-74
7E
S.C. battery voltage at engine derating
device
Â
Cable/connector is defective and is
contacted to battery voltage
Â
Engine derating device has an internal
defect
No reaction
OP mode : Normal
余
余
余
Check the cable from TCU to the
engine derating device
Check the connectors from backup
alarm device to TCU
Check the resistance* of backup
alarm device
* See page 3-74
侍#
Some fault codes are not applied to this machine.
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...