DIAGNOSTICS
4-4
©
200508
Automatic gearbox
1
ΛΦ45/55 series
3
Main code Sub-code RECOMMENDED PROCEDURES
Temperature in the gearbox sump is too high
24 23 1. Run the engine at idling speed.
2. Ensure that the vehicle is entirely horizontal.
3. Check whether the correct dip stick has been installed.
4. Check the oil level.
5. If necessary, correct the oil level.
6. If the oil level is in order, check whether the engine system has
overheated, causing the gearbox to overheat.
7. Check that the ECU and gearbox connectors are correctly connected,
firmly attached and undamaged.
If all these points are in order, contact your Allison dealer.
Output shaft speed sensor
25 00
11
22
33
44
55
66
77
Check the following points:
1. connector is connected.
2. sensor bolt is firmly attached.
3. ECU is firmly attached with no damaged connectors.
4. oil level.
5. no interruptions or short circuits between wires or earth in wiring harness
to sensor.
If all these points are in order, contact your Allison dealer.
Coupling 3 pressure switch open
32 00
33
55
77
1. Let the engine idle while the vehicle's parking brake is applied.
Check the following points:
1. specified dip stick.
2. correct oil level.
2. 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. no interruptions or short circuits between wires or earth in wiring
harness.
If all these points are in order, contact your Allison dealer.
Main code Sub-code RECOMMENDED PROCEDURES
Sensor fault in gearbox oil sump
33 12
23
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. no interruptions or short circuits between wires or earth in wiring harness.
If all these points are in order, contact your Allison dealer.
DAF LF Gearboxes and Clutch Service Manual
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