S0607900C
Page 20
Transmission Error Codes (ZF)
7D
S.C. to ground at engine
derating device.
• Cable is defective and is
contacted to vehicle ground.
• Engine derating device has
an internal defect.
• Connector pin is contacted
to vehicle ground.
Engine derating will
be on until TCU
power down even if
fault vanishes (loose
connection).
OP-Mode: normal.
Check cable from
TCU to engine
derating device.
Check connectors
from engine derating
device to TCU.
Check resistance
1)
of engine derating
device.
1)
See
“Measurement of
Resistance at
Actuator/sensors
and Cable” on page
35. (Only Mega
500-V)
7E S.C. to battery voltage at
engine derating device.
• Cable / connector is
defective and is contacted to
battery voltage.
• Engine derating device has
an internal defect.
No reaction.
OP-Mode: normal.
Check cable from
TCU to engine
derating device.
Check connectors
from backup alarm
device to TCU.
Check resistance
1)
of backup alarm
device.
Only Mega 500-V
7F O.C. at engine derating
device.
TCU detected a wrong
voltage at output pin, that
looks like a O.C. for this output
pin.
• Cable is defective and has
no connection to TCU.
• Engine derating device has
an internal defect.
• Connector has no
connection to TCU.
No reaction.
OP-Mode: normal.
Check cable from
TCU to engine
derating device.
Check connectors
from engine derating
device to TCU.
Check resistance
1)
of engine derating
device.
1)
See
“Measurement of
Resistance at
Actuator/sensors
and Cable” on page
35. (Only Mega
500-V)
81 S.C. to battery voltage at
clutch K4.
The measured resistance
value of valve is out of limit,
voltage at K4 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
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 shut
down.
Check cable from
TCU to gearbox.
Check connectors
from gearbox to
TCU.
Check regulator
resistance.
1)
Check internal wire
harness of gearbox.
1)
See
“Measurement of
Resistance at
Actuator/sensors
and Cable” on page
35.
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.