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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