DAF LF45, LF55 Series. Manual - part 226

 

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DAF LF45, LF55 Series. Manual - part 226

 

 

©

 200508

4-5

Automatic gearbox

DIAGNOSTICS

ΛΦ45/55 series

3

1

EEPROM fault

34

12

13

14

15

16

1.

Re-calibrate if necessary.

2.

If re-calibration is impossible, replace the ECU.

3.

If ECU replacement is impossible, contact your Allison dealer.

EEPROM writing error as a result of loss of power supply

35

00

16

Check the following points:

1.

ECU is firmly attached, clean and undamaged.

2.

VIM (Vehicle Interface Module) is firmly attached, clean and undamaged.

3.

the vehicle manufacturer has used the specified wiring for power supply 

and earth connection.

4.

battery positive pole.

5.

battery earth connection.

6.

specified connections for vehicle ignition.

If all these points are in order, contact your Allison dealer.

Hardware/software not compatible

36

00

1.

Replace ECU if possible.

2.

Re-program ECU if possible.

3.

If replacement or re-programming is not possible, contact your Allison 

dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

Interruption or short circuit in electromagnetic valve circuit

41

12

13

14

15

16

20

22

23

24

25

26

Check the following points:

1.

gearbox main connector is connected, is firmly attached, is clean and 

undamaged.

2.

ECU connector is connected, is firmly attached, is clean and undamaged.

3.

visual inspection of the wiring harness: no damage, chafed or too taut 

wires, no screws through the wiring harness.

4.

no interruptions or short circuits between wires or earth in wiring harness.

Replace wiring harness if necessary.

If all these points are in order, contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

DIAGNOSTICS

4-6

©

 200508

Automatic gearbox

1

ΛΦ45/55 series

3

Short circuit in the electromagnetic valve circuit to the battery

42

12

13

14

15

16

21

22

23

24

25

26

Check the following points:

1.

gearbox main connector is connected, is firmly attached, is clean and 

undamaged.

2.

ECU connector is connected, is firmly attached, is clean and undamaged.

3.

visual inspection of the wiring harness: no damage, chafed or too taut 

wires, no screws through the wiring harness.

4.

no interruptions or short circuits between wires or earth in wiring harness.

5.

Replace wiring harness if necessary.

6.

incompetent repairs.

If all these points are in order, contact your Allison dealer.

ECU circuits

43

21

25

26

1.

replace the ECU.

2.

Contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

Transmission ration test on the gear to be changed from (during shifting)

51

01

10

12

21

23

45

65

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

If all these points are in order, contact your Allison dealer.

Coupling 3 pressure switch fails to register pressure drop during shifting

52

01

08

32

34

54

56

71

78

79

99

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

4.

check that there is no interruption or short circuit between wires or earth 

connection in the main wiring harness to the gearbox.

If all these points are in order, contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

©

 200508

4-7

Automatic gearbox

DIAGNOSTICS

ΛΦ45/55 series

3

1

Main code Sub-code

RECOMMENDED PROCEDURES

Engine and turbine rev test when engaging neutral

53

08

18

28

29

38

39

48

49

58

59

68

69

78

99

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

If all these points are in order, contact your Allison dealer.

Transmission ratio test immediately after changing gear

54

01,07

10,12

17,21

23,32

34,43

45,54

56,65

70,71

80,81

83,85

86,92

93,95

96,97

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

If all these points are in order, contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

Pressure in coupling 3 immediately after changing gear

55

17

87

97

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

4.

check that there is no interruption or short circuit between the wiring or 

earth connection in the coupling 3 pressure switch wiring.

5.

Check the following points:

1.

main connector is properly connected, clean and undamaged.

2.

ECU connector is properly connected, clean and undamaged.

3.

rev sensor is properly connected, clean and undamaged.

If all these points are in order, contact your Allison dealer.

DIAGNOSTICS

4-8

©

 200508

Automatic gearbox

1

ΛΦ45/55 series

3

Range test

56

00

11

22

33

44

55

66

77

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

If all these points are in order, contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

Range test when using coupling C3

57

11

22

44

66

88

99

Check the following points:

1.

engine speed sensor and output shaft speed sensor are connected. The 

connectors are undamaged and clean.

2.

no interruptions or short circuits between wires or earth in sensor wiring.

3.

let the engine idle in neutral while the vehicle is on the brake.

Check the following points:

1.

specified dip stick.

2.

oil level.

4.

check that there is no interruption or short circuit between the wiring or 

earth connection in the coupling 3 pressure switch wiring.

5.

Check the following points:

1.

main connector is properly connected, clean and undamaged.

2.

ECU connector is properly connected, clean and undamaged.

3.

rev sensor is properly connected, clean and undamaged.

If all these points are in order, contact your Allison dealer.

Fault in ECU

69

12,13

14,15

16,21

22,23

24,25

26,32

33,34

35,36

1.

Delete the fault codes and try to re-start the vehicle.

2.

If the fault re-occurs, replace the ECU.

3.

If the fault has not been cleared, contact your Allison dealer.

Main code Sub-code

RECOMMENDED PROCEDURES

 

 

 

 

 

 

 

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