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3-59
Fault code
(Hex)
Meaning of the fault code
possible reason for fault detection
Reaction of the TCU
Possible steps to repair
26
S. C. t o b a t t e r y vo l t a g e o r O. C. a t
transmission sump temperature sensor
input
The measured voltage is too low:
·
Cable is defective and is contacted to
vehicle ground
·
Temperature sensor has an internal
defect
·
Connector pin is contacted to vehicle
ground
No reaction, TCU uses
default temperature
OP mode : Normal
·
·
·
Check the cable from TCU to the
sensor
Check the connectors
Check the temperature sensor
27
S. C. t o b a t t e r y vo l t a g e o r O. C. a t
retarder temperature sensor input
The measured voltage is too high:
·
Cable is defective and is contacted to
battery voltage
·
Cable has no connection to TCU
·
Temperature sensor has an internal
defect
·
Connector pin is contacted to battery
voltage or is broken
No reaction, TCU uses
default temperature
OP mode : Normal
·
·
·
Check the cable from TCU to the
sensor
Check the connectors
Check the temperature sensor
28
S.C. to ground at retarder temperature
sensor input
The measured voltage is too low:
·
Cable is defective and is contacted to
vehicle ground
·
Temperature sensor has an internal
defect
·
Connector pin is contacted to vehicle
ground
No reaction, TCU uses
default temperature
OP mode : Normal
·
·
·
Check the cable from TCU to the
sensor
Check the connectors
Check the temperature sensor
31
S.C. to battery voltage or O.C. at engine
speed input
TCU measures a voltage higher than
7.00V at speed input pin
·
Cable is defective and is contacted to
battery voltage
·
Cable has no connection to TCU
·
Speed sensor has an internal defect
·
Connector pin is contacted to battery
voltage or has no contact
OP mode : Substitute clutch
control
·
·
·
Check the cable from TCU to the
sensor
Check the connectors
Check the speed sensor
32
S.C. to ground at engine speed input
TCU measures a voltage less than 0.45V
at speed input pin
·
Cable/connector is defective and is
contacted to vehicle ground
·
Speed sensor has an internal defect
OP mode : Substitute clutch
control
·
·
·
Check the cable from TCU to the
sensor
Check the connectors
Check the speed sensor
33
Logical error at engine speed input
TCU measures a engine speed over a
threshold and the next moment the
measured speed is zero
·
Cable/connector is defective and has
bad contact
·
Speed sensor has an internal defect
·
Sensor gap has the wrong size
OP mode : Substitute clutch
control
·
·
·
·
※
Check the cable from TCU to the
sensor
Check the connectors
Check the speed sensor
Check the sensor gap
This fault is reset after power up of
TCU
※
Some fault codes are not applied to this machine.
Summary of Contents for HL955
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