3-72
Fault code
(Hex)
Meaning of the fault code
possible reason for fault detection
Reaction of the TCU
Possible steps to repair
C6
O.C. at joystick status indicator
TCU detected a wrong voltage at the
output pin, that looks like a O.C. for this
output pin
·
C a b l e i s d e f e c t i v e a n d h a s n o
connection to TCU
·
Joystick status indicator
has an internal
defect
·
Connector pin has no connection to
TCU
No reaction
OP mode : Normal
·
·
·
Check the cable from TCU to
joystick status indicator
Check the connectors from joystick
status indicator to TCU
Check the resistance* of joystick
status indicator
* See page 3-74
D1
S.C. to battery voltage at power supply
for sensors
TCU measures more than 6V at the pin
AU1 (5V sensor supply)
See fault codes No.21 to
2C
·
·
·
Check cables and connectors to
sensors, which are supplied from
AU1
Check the power supply at the pin
AU1(Should be appx. 5V)
Fault codes No.21 to No.2C may be
reaction of this fault
D2
S.C. to ground at power supply for
sensors
TCU measures less than 4V at the pin
AU1 (5V sensor supply)
See fault codes No.21 to
2C
·
·
·
Check cables and connectors to
sensors, which are supplied from
AU1
Check the power supply at the pin
AU1(Should be appx. 5V)
Fault codes No.21 to No.2C may be
reaction of this fault
D3
Low voltage at battery
Measured voltage at power supply is lower
than 18V(24V device)
Shift to neutral
OP mode : TCU shutdown
·
·
·
Check power supply battery
Check cables from batteries to TCU
Check connectors from batteries to
TCU
D4
High voltage at battery
Measured voltage at power supply is
higher than 32.5V(24V device)
Shift to neutral
OP mode : TCU shutdown
·
·
·
Check power supply battery
Check cables from batteries to TCU
Check connectors from batteries to
TCU
D5
Error at 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 shutdown
·
·
·
·
Check fuse
Check cables from gearbox to TCU
Check connectors from gearbox to
TCU
Replace TCU
D6
Error at 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 shutdown
·
·
·
·
Check fuse
Check cables from gearbox to TCU
Check connectors from gearbox to
TCU
Replace TCU
※
Some fault codes are not applied to this machine.
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...
