DAF LF45, LF55 Series. Manual — part 59

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1-5

ZF intarder EST42 fault codes

ZF INTARDER EST42

DAVIE XD diagnostics manual

15

46-15

No CAN communication possible between any

vehicle systems due to problems with the V-CAN:

-

interruption on pin 49 or 22 or

-

defective CAN terminating resistance

-

Normal braking effect of the intarder if the

steering column switch is in position 1.

-

Reduced braking effect of the intarder if the

steering column switch is in position 2 or 3.

(Current through proportional valve is

restricted to 250 mA max.)

-

No speed indication on DIP if V-constant

function is activated

-

No V-constant function possible

47-19

Incorrect or missing engine speed signal via

message on CAN network due to:

-

interruption on pin 22

-

short circuit to earth on pin 49

-

short circuit to supply on pin 22 and/or 49

-

defective CAN terminating resistance

-

incorrect message from UPEC unit

-

Maximum braking effect of intarder

restricted to 350 kW

-

AS Tronic gearbox does not shift down

automatically when the intarder is activated.

48-19

Incorrect or missing vehicle speed signal via

message on CAN network due to:

-

interruption on pin 22

-

short circuit to earth on pin 49

-

short circuit to supply on pin 22 and/or 49

-

defective CAN terminating resistance

-

incorrect message from MTCO unit

-

Normal braking effect of the intarder if the

steering column switch is in position 1.

-

Reduced braking effect of the intarder if the

steering column switch is in position 2 or 3.

(Current through proportional valve is

restricted to 250 mA max.)

-

No speed indication on DIP if V-constant

function is activated

-

No V-constant function possible

-

Intarder does not function during third brake

integration braking

49-19

Incorrect or missing cruise control speed signal

via message on CAN network due to:

-

interruption on pin 22

-

short circuit to earth on pin 49

-

short circuit to supply on pin 22 and/or 49

-

defective CAN terminating resistance

-

incorrect message from UPEC unit

-

V-constant function not available

51-19

Incorrect or missing current intarder braking

torque signal via message on CAN network due

to:

-

interruption on pin 22

-

short circuit to earth on pin 49

-

short circuit to supply on pin 22 and/or 49

-

defective CAN terminating resistance

-

incorrect message from UPEC unit

-

If the engine brake is switched on by foot

while the V-constant function is activated,

the intarder will not be automatically set to

the last selected current braking torque once

the engine brake is switched off.

64-19

Incorrect or missing CAN extension box signal via

message on CAN network due to:

-

interruption on pin 22

-

short circuit to earth on pin 49

-

short circuit to supply on pin 22 and/or 49

-

defective CAN terminating resistance

-

incorrect message from CAN extension box

-

No intarder braking effect possible via CAN

extension box

71-13

No supply voltage before ignition for intarder unit

(D902) due to:

-

short circuit to earth, interruption on pin 54 or

55

-

defective fuse E199

-

No noticeable system limitation

Fault code

Fault code description with possible cause

Symptom

ZF INTARDER EST42

1-6

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ZF intarder EST42 fault codes

15

DAVIE XD diagnostics manual

72-16

Incorrect supply voltage after ignition on pin 31 or

53 of intarder unit (D902) due to:

-

overvoltage > 36 V

-

No braking effect of intarder possible in any

position of steering column switch

-

No "intarder active" function indication on

DIP when intarder is activated

-

No speed indication on DIP if V-constant

function is activated

-

No V-constant function possible

72-17

Incorrect supply voltage after ignition on pin 31 or

53 of intarder unit (D902) due to:

-

undervoltage < 16 V

-

No braking effect of intarder possible in any

position of steering column switch

-

No "intarder active" function indication on

DIP when intarder is activated

-

No speed indication on DIP if V-constant

function is activated

-

No V-constant function possible

84-15

Internal fault in intarder unit (D902)

-

No braking effect of intarder possible in any

position of steering column switch

-

No speed indication on DIP if V-constant

function is activated

-

No V-constant function possible

Fault code

Fault code description with possible cause

Symptom

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2-1

System inspection with DAVIE XD

ZF INTARDER EST42

DAVIE XD diagnostics manual

15

2. SYSTEM INSPECTION WITH DAVIE XD

2.1 GENERAL

If the tyre size is changed or if the vehicle is

adjusted in such a way that the configuration is

changed, the electronic unit may have to be re-

programmed.

ZF INTARDER EST42

2-2

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System inspection with DAVIE XD

15

DAVIE XD diagnostics manual