DAF 95XF. Manual - part 171

 

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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

 

 

 

 

 

 

 

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