S0607900C
Page 27
Transmission Error Codes (ZF)
B4 Slippage at clutch K4.
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.
• Sensor gap is incorrect.
• 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 shut
down.
Check pressure at
clutch K4.
Check main
pressure in 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.
---------------
B5 Slippage at clutch KV.
TCU calculates a differential
speed at closed clutch KV. If
this calculated value is out of
range, TCU interprets this as
slipping clutch.
• Low pressure at clutch KV.
• Low main pressure.
• Wrong signal at internal
speed sensor.
• Wrong signal at turbine
speed sensor.
• Sensor gap is incorrect.
• 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 shut
down.
Check pressure at
clutch KV.
Check main
pressure in 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
* Only Mega 400-III PLUS
** Only Series "V"
Gray shaded boxes are error codes for other applications. They are only given for general reference purposes.
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