DAF 95XF. Manual — part 171

©

200438

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

©

200438

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

©

200438

1-11

AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual

3

3114

Clutch closes unexpectedly during standstill and
with engaged gear. Current clutch position
changes without the solenoid valves of the clutch
unit being actuated. The clutch unit travel sensor
transmits clutch movements to the modulator.
-

Poor freedom of movement of clutch plate
on the keyways of the input shaft

-

During controlled closing of the clutch, the
clutch remains temporarily open due to
insufficient mechanical freedom of
movement of the clutch (heavy point)

-

Mechanical fault of clutch unit solenoid
valves

At standstill:
-

gearbox is automatically shifted to the
neutral position

-

once the neutral position has been reached,
it will be possible to drive on after the
selector switch has been changed from
position D-N-D

-

automatic mode not available

3117

It is not possible to teach-in the clutch during the
self-test. No change in clutch position is detected,
despite actuation of solenoid valves Y14 to Y17 in
the clutch unit. Possible cause:
-

internal modulator fault (D954)

-

internal clutch unit fault (B385)

-

electrical fault in wiring harness between
modulator and clutch unit

-

incorrect clutch travel sensor signal, engine
speed signal or input shaft speed signal

-

System is not available

3118

Clutch does not open despite the fact that
solenoid valves Y16 and Y17 are actuated:
-

internal modulator fault (D954)

-

internal clutch unit fault (B385)

-

electrical fault in wiring harness between
modulator and clutch unit

-

incorrect clutch travel sensor signal, engine
speed signal or input shaft speed signal

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, a new effort is
made to open the clutch

-

at standstill the gearbox is automatically
shifted to the neutral position

-

system is not available

3119

Clutch does not close despite the fact that
solenoid valves Y14 and Y15 are actuated. The
clutch cannot transmit any engine torque.
-

Clutch travel sensor does not recognise the
closing motion of the clutch when driving or
when the engine is idling

-

Input shaft speed is not equal to the engine
speed

-

Admissible solenoid valve switch-on time is
exceeded

When driving:
-

no more gear changes possible

-

automatic mode not available

At standstill:
-

if the vehicle comes to a halt, the clutch is
opened

-

at standstill the gearbox is automatically
shifted to the neutral position

-

system is not available

3120

Selector valve Y17 (slowly open clutch) is not
working despite actuation (3x):
-

mechanical fault of selector valve Y17

-

Function is taken over by redundant selector
valve Y16

-

Reduced shifting comfort

-

Automatic mode not available

3121

Selector valve Y16 (open clutch rapidly) is not
working despite actuation (3x):
-

mechanical fault of selector valve Y16

-

Function is taken over by redundant selector
valve Y17

-

Reduced shifting comfort

-

Automatic mode not available

3122

Selector valve Y15 (close clutch slowly) is not
working despite actuation (3x):
-

mechanical fault of selector valve Y15

-

Function is taken over by redundant selector
valve Y14

-

Reduced shifting comfort

-

Automatic mode not available

Fault code

Fault code description with possible cause

Symptom

AS TRONIC

1-12

©

200438

AS Tronic fault codes

3

DAVIE XD diagnostics manual

3123

Selector valve Y14 (close clutch rapidly) is not
working despite actuation (3x):
-

mechanical fault of selector valve Y14

-

Function is taken over by redundant selector
valve Y15

-

Reduced shifting comfort

-

Automatic mode not available

3124

Incorrect clutch travel sensor signal due to:
-

clutch travel sensor signal being outside
ranch

-

increasing input shaft speed during
standstill, with the clutch sensor detecting an
opened clutch

-

unacceptable difference between engine
speed and input shaft speed, with clutch
being open

When driving:
-

clutch is opened and closed 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 as you drive off

3126

Incorrect pressure sensor signal from integrated
pressure sensor in the modulator (D954) due to:
-

defective pressure sensor in modulator

-

pressure sensor signal outside range

-

defective modulator (D954)

-

System available, provided there is sufficient
air supply to the modulator

-

Teaching in of position sensors of selector
valves and clutch position during the self-
test takes more time than usually

-

Automatic mode not available

3127

Incorrect ECU temperature signal from integrated
temperature sensor in the modulator (D954) due
to:
-

defective temperature sensor in modulator

-

temperature sensor signal outside range

-

defective modulator (D954)

-

No noticeable system limitation

-

Automatic mode not available

3129

Position sensor signal, main range, in the
modulator (D954):
-

short circuit to earth

-

short circuit to supply

-

interruption

When driving:
-

if the fault occurs during shifting, the signal
"gear engaged" from the main range
position sensor will be generated in a time-
controlled fashion

-

no more gear changes possible, except from
neutral position

-

automatic mode not available

At standstill:
-

the possibility to shift to the neutral position
is monitored by testing the engaging cylinder
for gate selection by actuating selector
valves Y4 and Y5

-

driving off from a stationary position is
possible

-

to prevent tooth-to-tooth contact, the air
supply main valve Y10 and main range
selector valves Y6/Y7 remain engaged until
the clutch position during closing exceeds a
particular value

Fault code

Fault code description with possible cause

Symptom