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3-73
Fault code
(Hex)
Meaning of the fault code
possible reason for fault detection
Reaction of the TCU
Possible steps to repair
E3
S.C. to battery voltage at display output
TCU sends data to the display and
measures always a high voltage level on
the connector
·
Cable or connectors are defective and
are contacted to battery voltage
·
Display has an internal defect
No reaction
OP mode : Normal
·
·
·
Check the cable from TCU to the
display
Check the connectors at the display
Change display
E4
S.C. to ground at display output
TCU sends data to the display and
measures always a high voltage level on
the connector
·
Cable or connectors are defective and
are contacted to battery voltage
·
Display has an internal defect
No reaction
OP mode : Normal
·
·
·
Check the cable from TCU to the
display
Check the connectors at the display
Change display
E5
Communication failure on DeviceNet
Shift to neutral
OP mode : TCU shutdown
·
·
·
Check Omron master
Check wire of DeviceNet-Bus
Check cable to Omron master
F1
General EEPROM fault
TCU can't read non volatile memory
·
TCU is defective
No reaction
OP mode : Normal
·
※
Replace TCU
Often shown together with fault
code F2
F2
Configuration lost
TCU has lost the correct configuration and
can't control the transmission
·
Interference during saving data on non
volatile memory
·
TCU is brand new or from another
vehicle
Transmission stay neutral
OP mode : TCU shutdown
·
Reprogram the correct configurat-
ion for the vehicle (e.g. with cluster
controller,...)
F3
Application error
Something of this application is wrong
Transmission stay neutral
OP mode : TCU shutdown
·
※
Replace TCU
This fault occurs only if an test
engineer did something wrong in
the application of the vehicle
F5
Clutch failure
AEB was not able to adjust clutch filling
parameters
·
One of the AEB-Values is out of limit
Transmission stay neutral
OP mode : TCU shutdown
·
※
Check clutch
TCU shows also the affected clutch
on the display
F6
Clutch adjustment data lost
TCU was not able to read correct clutch
adjustment parameters
·
Interference during saving data on non
volatile memory
·
TCU is brand new
No reaction,
Default values : 0 for AEB
Offsets used
OP mode : Normal
·
Execute AEB and brake sensor
calibration
F7
Substitute clutch control
·
Transmission input torque wrong
·
Engine retarder torque wrong
·
Speed signal (s) defective
OP mode : Substitute
clutch control
·
·
Check engine retarder torque
Check speed sensors
※
Some fault codes are not applied to this machine.
Summary of Contents for HL955
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