Hyundai HL955 Manual page 128

Fault code Meaning of the fault code
(Hex) possible reason for fault detection
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 fe c t i ve 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
D1
S.C. to battery voltage at power supply
for sensors
TCU measures more than 6V at the pin
AU1 (5V sensor supply)
D2
S.C. to ground at power supply for
sensors
TCU measures less than 4V at the pin
AU1 (5V sensor supply)
D3
Low voltage at battery
Measured voltage at power supply is lower
than 18V(24V device)
D4
High voltage at battery
Measured voltage at power supply is
higher than 32.5V(24V device)
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
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
※ Some fault codes are not applied to this machine.
Reaction of the TCU
No reaction
OP mode : Normal
See fault codes No.21 to
2C
See fault codes No.21 to
2C
Shift to neutral
OP mode : TCU shutdown
Shift to neutral
OP mode : TCU shutdown
Shift to neutral
OP mode : TCU shutdown
Shift to neutral
OP mode : TCU shutdown
3-72
Possible steps to repair
·
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
·
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
·
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
·
Check power supply battery
·
Check cables from batteries to TCU
·
Check connectors from batteries to
TCU
·
Check power supply battery
·
Check cables from batteries to TCU
·
Check connectors from batteries to
TCU
·
Check fuse
·
Check cables from gearbox to TCU
·
Check connectors from gearbox to
TCU
·
Replace TCU
·
Check fuse
·
Check cables from gearbox to TCU
·
Check connectors from gearbox to
TCU
·
Replace TCU