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Fault code
Meaning of the fault code
(Hex)
possible reason for fault detection
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
B2
S
S
lippage 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
B3
S
S
lippage 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
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
3-29
Possible steps to repair
·
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
·
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
·
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
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