DAF 95XF. Manual - part 169

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AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual 

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1. AS TRONIC FAULT CODES

1.1 INTRODUCTION

If the electronic unit detects a system fault, this 

fault is usually stored in the memory of the 

electronic unit as a fault code.

Most system faults will also generate a warning.

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AS Tronic fault codes

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DAVIE XD diagnostics manual

1.2 EXPLANATORY NOTES TO AS TRONIC FAULT CODES

Fault code

Fault code description with possible cause

Symptom

84

Incorrect or missing vehicle speed signal via 
message on CAN network

-

In automatic mode the gearbox may shift 
down early or late

-

No further system limitation

-

Automatic mode available

86

Incorrect or missing cruise control signal via 
message on CAN network, with the cruise control 
function being active

-

In automatic mode the gearbox may change 
gears accidentally during the cruise control 
function

-

No noticeable system limitation

91

Incorrect or missing accelerator pedal position 
signal via message on CAN network

When driving:
-

shifting quality may be affected

-

automatic mode not available

At standstill:
-

driving off from a stationary position is 
possible

-

drive off and manoeuvring quality may be 
affected

92

Incorrect or missing percentual engine torque 
signal at current speed via message on CAN 
network

-

No noticeable system limitation

-

Automatic mode available

158

Excessive modulator supply voltage: 
-

pin A4 / A5

When driving:
-

no noticeable system limitation

-

automatic mode available

At standstill:
-

if this fault is present before switching on the 
ignition, the gearbox will not leave the self-
test cycle. It is not possible to drive off.

Insufficient modulator supply voltage: 
-

pin A4 / A5

When driving:
-

no gear changes possible

At standstill:
-

automatic mode not available

-

no gear changes possible

-

if a gear has been engaged, the modulator 
will shift the gearbox to neutral when the 
ignition is switched off

190

Incorrect or missing engine speed signal via 
message on CAN network

When driving:
-

clutch is closed in a time-controlled fashion, 
which results in abrupt clutching

-

automatic mode not available

At standstill:
-

when driving off in the manoeuvring position, 
the clutch is operated in a time-controlled 
fashion, which results in abrupt clutching

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AS Tronic fault codes

AS TRONIC

DAVIE XD diagnostics manual 

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512

Incorrect or missing desired engine torque signal 
via message on CAN network (derived from 
engine management accelerator pedal position 
signal)

When driving:
-

clutch may close abruptly after changing 
gears, which affects the shifting quality

-

automatic mode not available

At standstill:
-

driving off from a stationary position is 
possible

513

Incorrect or missing current engine torque signal 
via message on CAN network

When driving:
-

shifting quality when shifting up and down 
may have been affected

-

automatic mode not available

At standstill:
-

driving off from a stationary position is 
possible

520

Incorrect or missing current intarder brake torque 
via message on CAN network

-

Automatic mode not available

-

No further system limitation

Incorrect or missing current engine braking 
torque signal via message on CAN network

-

If the engine brake is active, this may affect 
the shifting quality when shifting is started

-

Automatic mode not available

556

Incorrect or missing intarder configuration signal 
via message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

Incorrect or missing engine brake configuration 
signal via message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

558

Incorrect or missing signal from the accelerator 
pedal idling switch via message on CAN network

When driving:
-

automatic mode not available

-

no noticeable system limitation when driving

At standstill:
-

no response to the accelerator pedal as a 
result of which it is not possible to drive off 
from a stationary position

559

Incorrect or missing kickdown signal via message 
on CAN network

-

Kickdown function not available

-

No noticeable system limitation

-

Automatic mode available

561

Incorrect or missing ASR engine control "active" 
signal via message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

562

Incorrect or missing ASR differential brake control 
"active" signal via message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

563

Incorrect or missing ABS "active" signal via 
message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

595

Incorrect or missing cruise control "active" signal 
via message on CAN network

-

Automatic mode not available

-

No noticeable system limitation

597

Incorrect or missing service brake switch signal 
via message on CAN network

-

Automatic mode not available

-

When the vehicle is coasting, the clutch will 
be opened at a vehicle speed exceeding 
1.5 km/h.

904

Incorrect or missing front axle speed signal via 
message on CAN network

-

Automatic mode available

-

No noticeable system limitation

Fault code

Fault code description with possible cause

Symptom

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1623

Incorrect or missing tachograph speed signal via 
message on CAN network

-

Automatic mode available

-

If there is an internal speed signal, no 
noticeable system limitation

3002

Modulator, selector valve Y2 for splitter range:
-

short circuit to earth

-

interruption

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

short circuit to supply

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

PTO 1/2 cannot be selected

-

Manoeuvring position not available in D 
and R

3003

Modulator, selector valve Y3 for splitter range:
-

short circuit to supply

-

interruption

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

short circuit to earth

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

PTO 1/2 cannot be selected

-Manoeuvring position not available in D and R

3004

Modulator, selector valve Y4 for gate selection:
-

short circuit to earth

-

interruption

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

short circuit to supply

-

Automatic mode not available

-

If the fault occurs during shifting, the 
engaged gear will remain engaged. The 
modulator will try to shift the vehicle to a 
suitable gear, both at standstill and when 
driving. If this is not possible, the gearbox 
will be shifted to the neutral position.

-

Manoeuvring position not available in D

Fault code

Fault code description with possible cause

Symptom