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Fault code
Meaning of the fault code
(Hex)
possible reason for fault detection
71
S.C. to battery voltage at clutch K1
The measured resistance value of the valve
is out of limit, the voltage at K1 valve is too
high
·Cable/connector is defective and has
contact to battery voltage
·Cable/connector is defective and has
contact to another regulator output of the
TCU
·Regulator has an internal defect
72
S
S
.C. to ground at clutch K1
The measured resistance value of the valve
is out of limit, the voltage at K1 valve is too
low
·Cable/connector is defective and has
contact to vehicle ground
·Regulator has an internal defect
73
O
O
.C. at clutch K1
The measured resistance value of the
valve is out of limit
·Cable/connector is defective and has no
contact to TCU
·Regulator has an internal defect
74
S
S
.C. to battery voltage at clutch K2
The measured resistance value of the
valve is out of limit, the voltage at K2 valve
is too high
·Cable/connector is defective and has
contact to battery voltage
·Cable/connector is defective and has
contact to another regulator output of the
TCU
·Regulator has an internal defect
75
S
S
.C. to ground at clutch K2
The measured resistance value of the valve
is out of limit, the voltage at K2 valve is too
low
·Cable/connector is defective and has
contact to vehicle ground
·Regulator has an internal defect
76
O
O
.C. at clutch K2
The measured resistance value of the
valve is out of limit
·Cable/connector is defective and has no
contact to TCU
·Regulator has an internal defect
Reaction of the TCU
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch is
pending
TCU shifts to neutral
OP mode : TCU shutdown
3-21
Possible steps to repair
·
Check the cable from TCU to the
gearbox
·
Check the connectors from TCU
to the gearbox
·
Check the regulator resistance*
·
Check internal wire harness of the
gearbox
* See page 3-36
·
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 3-36
·
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 3-36
·
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 3-36
·
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 3-36
·
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 3-36
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