S0607900C
Page 29
Transmission Error Codes (ZF)
D4 High power at battery.
Measured voltage at power
supply is higher than 32 V.
Shift to neutral.
OP-Mode: TCU shut
down.
Check power supply
battery.
Check cables from
batteries to TCU.
Check connectors
from batteries to
TCU.
---------------
D5 Error at switch 1 for valve
power supply VPS1.
TCU switched on VPS1 and
measured VPS1 is off or TCU
switched off VPS1 and
measured VPS1 is still on.
• Cable or connectors are
defect and are contacted to
battery voltage.
• Cable or connectors are
defect and are contacted to
vehicle ground.
• Permanent power supply
KL30 missing.
• TCU has an internal defect.
Shift to neutral.
OP-Mode: TCU shut
down.
Check fuse.
Check cables from
gearbox to TCU.
Check connectors
from gearbox to
TCU.
Replace TCU.
---------------
D6 Error at switch 2 for valve
power supply VPS2.
TCU switched on VPS2 and
measured VPS2 is off or TCU
switched off VPS2 and
measured VPS2 is still on.
• Cable or connectors are
defect and are contacted to
battery voltage.
• Cable or connectors are
defect and are contacted to
vehicle ground.
• Permanent power supply
KL30 missing.
• TCU has an internal defect.
Shift to neutral.
OP-Mode: TCU shut
down.
Check fuse.
Check cables from
gearbox to TCU.
Check connectors
from gearbox to
TCU.
Replace TCU.
---------------
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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