DAF LF45, LF55 Series. Manual — part 225
©
200508
4-1
Automatic gearbox
DIAGNOSTICS
ΛΦ45/55 series
3
1
4. AUTOMATIC GEARBOX
4.1 READING/DELETING ALLISON MD 3060 FAULT CODES
Fault code read function
To enter the fault code reading mode, briefly
press the two arrow keys twice simultaneously.
"D-1" appears on the display, followed by "-".
This means that at that point there are no faults
(active faults) in the system. It also means that no
faults have been registered that were earlier
temporarily present and have now been cleared
(inactive faults). The fault code reading function
can be left by pressing "D", "N", or "R" or the
arrow keys.
If the red lamp lights up while reading a fault
code, this means that there is an active fault in the
gearbox.
No message during reading means that the fault
is inactive.
The ECU can save five active/inactive fault codes
in its memory and show them on the display.
Fault codes consist of two sets of two digits (main
codes and sub-codes). To read the codes
consecutively, the "MODE" button must be
pressed each time.
The letters and digits appear one at a time on the
display.
The hyphen after D4 means that there are no
further faults and that it is therefore not necessary
to look at level D5.
As the ECU can only contain the five most
important codes, the five most important codes
will be seen on D1 to D5. Only when one of the
faults has been remedied will the ECU be in a
position to show a less important fault.
R
D
MODE
N
V300392
Example:
D1
25 - 22
D2
21 - 12
D3
24 - 12
D4
-
DIAGNOSTICS
4-2
©
200508
Automatic gearbox
1
ΛΦ45/55 series
3
Deleting fault codes
After faults have been remedied, the ECU
memory must be deleted. This is done as follows.
Press the arrow keys twice simultaneously. This
is the fault code reading mode. Press the
"MODE" key and hold it down until the red lamp
flashes three times (the first flash will be after
approx. three seconds, the second after approx.
10 seconds). All codes, active or inactive, have
now been deleted. Codes which return following
deleting and can therefore no longer be deleted
are active. Both types of fault need their causes
tracing and remedying as quickly as possible.
After the fault codes have been deleted the
ignition must be switched off and re-started;
otherwise it will not be possible to drive. This can
be seen from the flashing of the gear lever
position.
Inactive faults are automatically deleted by the
ECU if the fault no longer occurs after the vehicle
ignition has been switched off and on 25 times.
It is not possible to remedy all fault codes. Fault
codes that cannot be found in the "Table of Fault
Codes" can best be remedied by an Allison
dealer.
He has test and diagnostic apparatus at his
disposal that can be connected to a special
diagnostic socket in the central box (next to the
DAVIE connector).
R
D
MODE
N
V300392
©
200508
4-3
Automatic gearbox
DIAGNOSTICS
ΛΦ45/55 series
3
1
4.2 ALLISON MD 3060 TABLE OF FAULT CODES
Main code Sub-code
RECOMMENDED PROCEDURES
Electronic control unit (ECU) supply
13
12 Low
23 High
Check the following points:
1.
earth and positive battery cables connected, firmly attached and clean.
2.
batteries are charged.
3.
vehicle loading system fails to load or loads too little or too much.
4.
VIM fuse (Vehicle Interface Module).
5.
VIM connections are firmly attached, clean and undamaged.
6.
the correct wiring is used.
7.
ECU connections are firmly attached, clean and undamaged.
If all these points are in order, contact your Allison dealer.
Accelerator pedal sensor
21
12
23
Check the following points:
1.
Accelerator pedal sensor connector is properly connected.
2.
no interruptions or short circuits between wires or earth in wiring harness
to accelerator pedal sensor.
Replace the accelerator pedal sensor if necessary.
If all these points are in order, contact your Allison dealer.
Main code Sub-code
RECOMMENDED PROCEDURES
Speed sensors
22
14
15
16
Check the following points:
1.
connectors are firmly attached, clean and undamaged.
2.
the speed sensor attachment bolt is tightened to the specified torque.
3.
no interruptions or short circuits between wires or earth in wiring harness
to sensor.
If all these points are in order, contact your Allison dealer.
Selector keypad
23
12
13
14
15
23
24
Check the following points:
1.
ECU connections - connectors are connected and clamped.
2.
selector keypad is connected and the wire loop has been cut through.
3.
no interruptions or short circuits between wires or earth in wiring harness
to selector.
Replace the selector if possible.
If all these points are in order, contact your Allison dealer.
Temperature in the gearbox sump too low
24
12
Check the following points:
1.
temperature is lower than -6
″C.
1.
If this is the case, it is a normal response to the ambient temperature.
2.
If not, check whether the main gearbox is firmly connected and that
the connectors are undamaged.
If all these points are in order, contact your Allison dealer.
DIAGNOSTICS
4-4
©
200508
Automatic gearbox
1
ΛΦ45/55 series
3
Main code Sub-code
RECOMMENDED PROCEDURES
Temperature in the gearbox sump is too high
24
23
1.
Run the engine at idling speed.
2.
Ensure that the vehicle is entirely horizontal.
3.
Check whether the correct dip stick has been installed.
4.
Check the oil level.
5.
If necessary, correct the oil level.
6.
If the oil level is in order, check whether the engine system has
overheated, causing the gearbox to overheat.
7.
Check that the ECU and gearbox connectors are correctly connected,
firmly attached and undamaged.
If all these points are in order, contact your Allison dealer.
Output shaft speed sensor
25
00
11
22
33
44
55
66
77
Check the following points:
1.
connector is connected.
2.
sensor bolt is firmly attached.
3.
ECU is firmly attached with no damaged connectors.
4.
oil level.
5.
no interruptions or short circuits between wires or earth in wiring harness
to sensor.
If all these points are in order, contact your Allison dealer.
Coupling 3 pressure switch open
32
00
33
55
77
1.
Let the engine idle while the vehicle's parking brake is applied.
Check the following points:
1.
specified dip stick.
2.
correct oil level.
2.
Check the following points:
1.
gearbox main connector is connected, is firmly attached, is clean
and undamaged.
2.
ECU connector is connected, is firmly attached, is clean and
undamaged.
3.
no interruptions or short circuits between wires or earth in wiring
harness.
If all these points are in order, contact your Allison dealer.
Main code Sub-code
RECOMMENDED PROCEDURES
Sensor fault in gearbox oil sump
33
12
23
Check the following points:
1.
gearbox main connector is connected, is firmly attached, is clean and
undamaged.
2.
ECU connector is connected, is firmly attached, is clean and undamaged.
3.
no interruptions or short circuits between wires or earth in wiring harness.
If all these points are in order, contact your Allison dealer.
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