3-69
Fault code
(Hex)
Meaning of the fault code
possible reason for fault detection
Reaction of the TCU
Possible steps to repair
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
No reaction
OP mode : Normal
·
·
·
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
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 f e c t i v e a n d h a s n o
connection to TCU
·
Warning device has an internal defect
·
Connector has no connection to TCU
No reaction
OP mode : Normal
·
·
·
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
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
No reaction
OP mode : Normal
·
·
·
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
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
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
·
·
·
·
·
·
·
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
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
TCU shifts to neutral
OP mode : Limp home
If failure at another clutch
is pending
TCU shifts to neutral
OP mode : TCU shutdown
·
·
·
·
·
·
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
※
Some fault codes are not applied to this machine.
Содержание HL955
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