DAF LF45, LF55 Series. Manual — part 17

©

1-7

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

3

3018

Short circuit to earth or interruption of selector
valve Y17 (slowly open clutch):
-

pin B9 of modulator (D954)

-

Modulator output is switched off

-

Selector valve Y16 (quickly open clutch)
takes over function

-

Reduced comfort during clutching

-

No automatic mode available

Short circuit to supply of selector valve Y17
(slowly open clutch):
-

pin B9 of modulator (D954)

-

No more gear changes possible, system not
available

-

At standstill the gearbox will automatically
be shifted to the neutral position if the clutch
is open

3019

Short circuit to earth or interruption of selector
valve Y15 (close clutch slowly):
-

pin B7 of modulator (D954)

-

Modulator output is switched off

-

Selector valve Y14 (close clutch rapidly)
takes over function

-

Reduced comfort during clutching

-

No automatic mode available

Short circuit to supply of selector valve Y15 (close
clutch slowly):
-

pin B7 of modulator (D954)

-

No more gear changes possible, system not
available

-

When driving, the required clutch position is
controlled by selector valves (clutch open)

-

At standstill the gearbox is automatically
shifted to the neutral position after a few
seconds

3020

Short circuit to earth or interruption of selector
valve Y16 (open clutch rapidly):
-

pin B12 of modulator (D954)

-

Modulator output is switched off

-

Selector valve Y17 (open clutch slowly)
takes over function

-

Extended shifting time

-

Reduced comfort during clutching

-

No automatic mode available

Short circuit to supply of selector valve Y16 (open
clutch rapidly):
-

pin B12 of modulator (D954)

-

Actuating unit (D955) is switched off

-

System not available

3021

Short circuit to earth or interruption of selector
valve Y14 (close clutch rapidly):
-

pin B8 of modulator (D954)

-

Modulator output is switched off

-

Selector valve Y15 (close clutch slowly)
takes over function

-

Extended shifting times

-

Reduced comfort during clutching

-

No automatic mode available

Short circuit to supply of selector valve Y14 (close
clutch rapidly):
-

pin B8 of modulator (D954)

-

No more gear changes possible, system not
available

-

When driving, the required clutch position is
controlled by selector valves (clutch open)

-

At standstill the gearbox is automatically
shifted to the neutral position after a few
seconds

3022

Short circuit to earth or interruption of power
supply to internal speed sensor (F705) or
actuating unit (D955):
-

pin B18 of modulator (D954)

-

pin A11 of modulator (D954)

-

No more gear changes possible

-

If the vehicle comes to a halt, the clutch is
automatically opened

-

Gearbox shifts automatically to the neutral
position

-

System not available

Short circuit to supply of internal speed sensor
(F705) or actuating unit (D955):
-

pin B18 of modulator (D954)

-

pin A11 of modulator (D954)

-

Fault is recognised during self-test when
switching ignition off/on

-

No noticeable system limitation

-

Automatic mode remains available

Fault code

Fault code description with possible cause

Symptom

AS TRONIC

1-8

©

AS Tronic fault codes

3

DAVIE XD diagnostics manual

3026

Engine configuration not recognised via message
on CAN network due to:
-

communication problem with UPEC ECU

-

Automatic mode remains available, but
reduced shifting characteristics are possible

-

Downshift speed may be too low, which
results in reduced shifting comfort

-

Reduced comfort during declutching

3027

Incorrect or missing engine configuration signal
via message on CAN network

-

Automatic mode remains available, but
reduced shifting characteristics are possible

-

Downshift speed may be too low, which
results in reduced shifting comfort

-

Reduced comfort during declutching

3033

Engine brake configuration signal not recognised
via message on CAN network due to:
-

communication problem with UPEC ECU

-

No noticeable system limitation

-

Automatic mode available

3059

Incorrect PTO 1 status signal via message on
CAN network, in the following situation:
-

PTO 1 status signal active

-

no request (PTO switch) for PTO 1

-

no actuation (VIC ECU) of PTO 1

-

With a PTO 1 request the PTO 1 output of
the VIC ECU is actuated normally

-

No noticeable system limitation

-

Automatic mode available

3060

Incorrect PTO 2 status signal via message on
CAN network, in the following situation:
-

PTO 2 status signal active

-

no request (PTO switch) for PTO 2

-

no actuation (VIC ECU) of PTO 2

-

With a PTO 2 request the PTO 2 output of
the VIC ECU is actuated normally

-

No noticeable system limitation

-

Automatic mode available

3061

Incorrect PTO 1 status signal via message on
CAN network, in the following situation:
-

PTO 1 status signal active

-

request (PTO switch) for disengaging PTO 1
is present

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

If the vehicle comes to a halt, the clutch is
automatically opened

-

at standstill the gearbox is automatically
shifted to the neutral position

-

no more gear changes possible

-

system not available

3062

Incorrect PTO 2 status signal via message on
CAN network, in the following situation:
-

PTO 2 status signal active

-

request (PTO switch) for disengaging PTO 2
is present

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

If the vehicle comes to a halt, the clutch is
automatically opened

-

at standstill the gearbox is automatically
shifted to the neutral position

-

no more gear changes possible

-

system not available

3063

Missing PTO 1 status signal via message on CAN
network, in the following situation:
-

request (PTO switch) for PTO 1 is present

-

actuation of PTO 1 solenoid valve via VIC
ECU

-

Actuation of PTO 1 is discontinued

-

PTO 1 is not available

-

No noticeable system limitation

-

Automatic mode available

3064

Missing PTO 2 status signal via message on CAN
network, in the following situation:
-

request (PTO switch) for PTO 2 is present

-

actuation of PTO 2 solenoid valve via VIC
ECU

-

Actuation of PTO 2 is discontinued

-

PTO 2 not available

-

No noticeable system limitation

-

Automatic mode available

Fault code

Fault code description with possible cause

Symptom

©

1-9

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

3

3090

Internal modulator fault (D954) due to:
-

communication problem between internal
processors of modulator (D954)

-

basic software 1 and 2 of modulator (D954)
has been corrupted

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

If the vehicle comes to a halt, the clutch is
automatically opened

-

at standstill the gearbox is automatically
shifted to the neutral position

-

no more gear changes possible

-

system not available

3091

Incorrect or missing ABS/EBS signal via
message on CAN network due to:
-

communication problem with ABS/EBS

-

Automatic mode not available

-

No noticeable system limitation

3098

Incorrect or missing speed signal from the
gearbox input shaft (measured by the integrated
speed sensor in the modulator (D954)) due to:
-

defective integrated speed sensor in the
modulator

-

incorrect mechanical operation of the
transmission brake clutch

When driving:
-

extended shifting times

-

reduced shifting comfort when changing
gears; when shifting up and down, the clutch
in neutral position will be partially closed to
adjust the speed of the input shaft to that of
the engine

-

with engaged gear the input shaft speed
signal is replaced with the output shaft
speed signal

-

automatic mode not available

At standstill:
-

extended shifting time when engaging a
gear

-

reduced clutch comfort when closing the
clutch

3099

Incorrect or missing output shaft speed signal
(measured by the internal speed sensor (F705))
due to:
-

defective internal speed sensor (F705)

-

Internal speed signal is replaced with the
vehicle speed signal from the MTCO sensor
(F533)

-

No noticeable system limitation

-

Automatic mode available

3101

Incorrect or missing input shaft speed signal and
incorrect or missing output shaft speed signal due
to:
-

defective integrated speed sensor in the
modulator

-

incorrect mechanical operation of the
transmission brake clutch

-

defective internal speed sensor (F705)

-

defective modulator (D954)

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

If the vehicle comes to a halt, the clutch is
automatically opened

-

at standstill the gearbox is automatically
shifted to the neutral position

-

no more gear changes possible

-

system not available

3102

The ratio between the speed signal of the input
shaft and that of the output shaft is not acceptable
in relation to the engaged gear ratio.

When driving:
-

no more gear changes possible; the gearbox
tries to automatically shift to the neutral
position

-

automatic mode not available

At standstill:
-

driving off from a stationary position in
automatically selected drive-off gears is
possible

Fault code

Fault code description with possible cause

Symptom

AS TRONIC

1-10

©

AS Tronic fault codes

3

DAVIE XD diagnostics manual

3107

Incorrect or missing supply voltage of the clutch
travel sensor in the clutch unit:
-

pin B15 of the clutch unit (B385)

When driving:
-

reduced clutch comfort when opening and
closing the clutch; this is done in a time-
controlled fashion

-

automatic mode not available

At standstill:
-

shunting is not possible

-

if driving off from a stationary position does
not take place within a certain period of time,
the gearbox will be automatically shifted to
the neutral position. The drive-off gear must
then be selected manually.

-

reduced clutch comfort when closing the
clutch

3108

Internal fault in actuating unit (D955) due to:
-

unacceptable gear lever position sensor
signals in relation to each other

-

defective selector switch (E590)

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

when driving off, the drive-off gear will be
selected in accordance with the position of
the selector switch, both forward and
reverse

-

after the ignition has been switched off, the
gearbox will be shifted to the neutral position

-

the system will not be available when the
ignition is switched on

3110

Incorrect or missing internal CAN signal due to:
-

communication problem with internal CAN
system

-

internal short circuit on pin C1 or C3 of
actuating unit (D955)

-

internal short circuit on pin A3 or A6 of
modulator (D954)

When switching on the ignition:
-

fault is recognised during self-test

-

system is not available

When driving:
-

no gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the last
selected drive-off gear is engaged; it is only
possible to drive in this gear. If reverse was
the last selected drive-off gear, the gearbox
is automatically shifted to the neutral
position.

3111

No recognition of "realtime" signal (time/date) via
message on CAN network due to:
-

communication problem with UPEC ECU

-

No noticeable system limitation

-

Automatic mode available

-

3112

Incorrect or missing "realtime" signal (time/date)
via message on CAN network (this signal is used
to calculate the clutch load):
-

clutch load can no longer be checked

-

No noticeable system limitation

-

Automatic mode available

-

3113

Intarder configuration signal not recognised via
message on CAN network due to:
-

communication problem with EST 42 ECU

-

incorrect programming of AS Tronic basic
software

-

No noticeable system limitation

-

Automatic mode not available

Fault code

Fault code description with possible cause

Symptom