6F
ACCELERATOR LOW IDLE
SWITCH SIGNAL
CAN signal for manual
downshift is defective
EEC controller is
defective
interference on CAN-Bus
no reaction,
TCU uses default signal
accelerator pedal in idle
position
OP-Mode: normal
check EEC controller
check wire of CAN-
Bus
check cable to EEC
controller
if this signal is not
transmitted via CAN,
TCU uses default signal
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
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check the cable from
TCU to the gearbox
check the connectors
from TCU to the
gearbox
check the regulator
resistance
1)
check internal wire
harness of the
gearbox
1)
see chapter 4
72
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
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check the cable from
TCU to the gearbox
check the connectors
from gearbox to TCU
check the regulator
resistance
1)
check internal wire
harness of the
gearbox
1)
see chapter 4
73
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
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check the cable from
TCU to the gearbox
check the connectors
from gearbox to TCU
check the regulator
resistance
1)
check internal wire
harness of the
gearbox
1)
see chapter 4
74
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
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check the cable from
TCU to the gearbox
check the connectors
from gearbox to TCU
check the regulator
resistance
1)
check internal wire
harness of the
gearbox
1)
see chapter 4
Fault
Code
(hex)
MEANING OF THE FAULT
CODE
Possible reason for fault
detection
Reaction of the
TCU
Possible steps
to repair
Remarks
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