B1
SLIPPAGE AT CLUTCH K1
TCU calculates a differential
speed at closed clutch K1. If
this calculated value is out of
range, TCU interprets this as
slipping clutch.
low pressure at clutch K1
low main pressure
wrong signal at internal
speed sensor
wrong signal at output
speed sensor
wrong size of the sensor
gap
clutch is defective
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check pressure at
clutch K1
check main pressure
in the system
check sensor gap at
internal speed sensor
check sensor gap at
output speed sensor
check signal at
internal speed sensor
check signal at output
speed sensor
replace clutch
B2
SLIPPAGE AT CLUTCH
K2
TCU calculates a differential
speed at closed clutch K2. If
this calculated value is out of
range, TCU interprets this as
slipping clutch.
low pressure at clutch K2
low main pressure
wrong signal at internal
speed sensor
wrong signal at output
speed sensor
wrong size of the sensor
gap
clutch is defective
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check pressure at
clutch K2
check main pressure
in the system
check sensor gap at
internal speed sensor
check sensor gap at
output speed sensor
check signal at
internal speed sensor
check signal at output
speed sensor
replace clutch
B3
SLIPPAGE AT CLUTCH K3
TCU calculates a differential
speed at closed clutch K3. If
this calculated value is out of
range, TCU interprets this as
slipping clutch.
low pressure at clutch K3
low main pressure
wrong signal at internal
speed sensor
wrong signal at output
speed sensor
wrong size of the sensor
gap
clutch is defective
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check pressure at
clutch K3
check main pressure
in the system
check sensor gap at
internal speed sensor
check sensor gap at
output speed sensor
check signal at
internal speed sensor
check signal at output
speed sensor
replace clutch
B4
SLIPPAGE AT CLUTCH K4
TCU calculated a difference
speed at TCU calculates a
differential speed at closed
clutch K4. If this calculated
value is out of range, TCU
interprets this as slipping
clutch.
low pressure at clutch K4
low main pressure
wrong signal at internal
speed sensor
wrong signal at turbine
speed sensor
wrong size of the sensor
gap
clutch is defective
TCU shifts to neutral
OP-Mode: limp home
if failure at another
clutch is pending
TCU shifts to neutral
OP-Mode: TCU
shutdown
check pressure at
clutch K4
check main pressure
in the system
check sensor gap at
internal speed sensor
check sensor gap at
turbine speed sensor
check signal at
internal speed sensor
check signal at turbine
speed sensor
replace clutch
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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