DAF CF65, CF75, CF85 Series . Manual - part 290

CF65/75/85 series

Automatic gearbox

DIAGNOSTICS

5-1

5. AUTOMATIC GEARBOX

5.1 READING/DELETING FAULT CODES

Fault code reading mode
To enter the fault code reading mode, briefly
press the two arrow keystwice 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 mode
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
figures (main codes and sub-codes). To read the
codes consecutively, the “MODE” button must
be pressed each time.

The letters and figures appear one at a time
after one other on the display.

Example:

25 - 22

21 - 12

24 - 12

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 shown 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.

MODE

V300392

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DIAGNOSTICS

Automatic gearbox

CF65/75/85 series

5-2

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
contact 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 plug in the central box (next to the
DAVIE connector).

MODE

V300392

ᓻ 200337

CF65/75/85 series

Automatic gearbox

DIAGNOSTICS

5-3

5.2 TABLE OF FAULT CODES

Main code

Sub-code

RECOMMENDED PROCEDURES

Electronic control unit (ECU) supply

12 Low

23 High

Check the following points:
a. Earth and positive battery cables connected, firmly attached and

clean.

b. Batteries are charged.
c. Vehicle loading system fails to load or loads too little or too much.
d. VIM fuse (Vehicle Interface Module).
e. VIM connections are firmly attached, clean and undamaged.
f.

The correct wiring is used.

g. ECU connections are firmly attached, clean and undamaged.
If all points are in order, contact your Allison dealer.

Accelerator pedal sensor

12
23

Check the following points:
a. Accelerator pedal sensor connector is connected.
b. 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 points are in order, contact your Allison dealer.

Speed sensors

14
15
16

Check the following points:
a. Connectors are firmly attached, clean and undamaged.
b. The speed sensor attachment bolt is tightened to the specified

torque.

c. No interruptions or short circuits between wires or earth in wiring

harness to sensor.

If all points are in order, contact your Allison dealer.

Selector keypad

12
13
14
15
23
24

Check the following points:
a. ECU connections - connectors are connected and clamped.
b. Selector keypad is connected and the wire loop has been cut

through.

c. No interruptions or short circuits between wires or earth in wiring

harness to selector.

Replace the selector if necessary.
If all points are in order, contact your Allison dealer.

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DIAGNOSTICS

Automatic gearbox

CF65/75/85 series

5-4

Main code

Sub-code

RECOMMENDED PROCEDURES

Temperature in the gearbox sump too low

Check the following points:
a. 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 points are in order, contact your Allison dealer.

Temperature in the gearbox sump too high

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 points are in order, contact your Allison dealer.

Output shaft speed sensor

22
33
44
55
66
77

Check the following points:
a. Connector is connected.
b. Sensor bolt is firmly attached.
c. ECU is firmly attached with no damaged connectors.
d. Oil level.
e. No interruptions or short circuits between wires or earth in wiring

harness to sensor.

If all points are in order, contact your Allison dealer.

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