Hyundai HL955 Manual page 125

Fault code Meaning of the fault code
(Hex) possible reason for fault detection
A4
S.C. to ground at warning signal output
TCU detected a wrong voltage at the
output pin, that looks like a S.C. to vehicle
ground
· Cable is defective and is contacted to
vehicle ground
· Warning device has an internal defect
· Connector pin is contacted to vehicle
ground
A5
O.C. voltage at warning signal output
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
·Warning device has an internal defect
· Connector has no connection to TCU
A6
S.C. to battery voltage at warning signal
output
TCU detected a wrong voltage at the
output pin, that looks like a S.C. to battery
voltage
· Cable is defective and has is contacted
to battery voltage
· Warning device has an internal defect
· Connector pin is contacted to battery
voltage
B1
Slippage at clutch K1
TCU calculates a differential speed at
closed clutch K1. If this calculated value
is out of range, TCU interprets this as
slipping clutch
·Low pressure at clutch K1
· Low main pressure
· Wrong signal at internal speed sensor
· Wrong signal at output speed sensor
· Wrong size of the sensor gap
· Clutch is defective
B2
Slippage at clutch K2
TCU calculates a differential speed at
closed clutch K2. If this calculated value
is out of range, TCU interprets this as
slipping clutch
·Low pressure at clutch K2
·Low main pressure
·Wrong signal at internal speed sensor
· Wrong signal at output speed sensor
· Wrong size of the sensor gap
· Clutch is defective
※ Some fault codes are not applied to this machine.
Reaction of the TCU
No reaction
OP mode : Normal
No reaction
OP mode : Normal
No reaction
OP mode : Normal
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
3-69
Possible steps to repair
·
Check the cable from TCU to the
warning device
·
Check the connectors from warning
device to TCU
·
Check the resistance* of warning
device
* See page 3-74
·
Check the cable from TCU to the
warning device
·
Check the connectors from warning
device to TCU
·
Check the resistance* of warning
device
* See page 3-74
·
Check the cable from TCU to the
warning device
·
Check the connectors from warning
device to TCU
·
Check the resistance* of warning
device
* See page 3-74
·
Check pressure at clutch K1
·
Check main pressure in the system
·
Check sensor gap at internal speed
sensor
·
Check sensor gap at output speed
sensor
·
Check signal at internal speed
sensor
·
Check signal at output speed
sensor
·
Replace clutch
·
Check pressure at clutch K2
Check main pressure in the system
·
Check sensor gap at internal speed
sensor
·
Check sensor gap at output speed
sensor
·
Check signal at internal speed
sensor
·
Check signal at output speed
sensor
·
Replace clutch