DAF LF45 Series Service Manual

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
DAF LF Gearboxes and Clutch Service Manual

DAF LF45 Series Specifications

General

Brand	DAF
Model	LF45 Series
Category	Trucks
Language	English