©
200508 4-3
Automatic gearbox
DIAGNOSTICS
ΛΦ45/55 series
3
1
4.2 ALLISON MD 3060 TABLE OF FAULT CODES
Main code Sub-code RECOMMENDED PROCEDURES
Electronic control unit (ECU) supply
13 12 Low
23 High
Check the following points:
1. earth and positive battery cables connected, firmly attached and clean.
2. batteries are charged.
3. vehicle loading system fails to load or loads too little or too much.
4. VIM fuse (Vehicle Interface Module).
5. VIM connections are firmly attached, clean and undamaged.
6. the correct wiring is used.
7. ECU connections are firmly attached, clean and undamaged.
If all these points are in order, contact your Allison dealer.
Accelerator pedal sensor
21 12
23
Check the following points:
1. Accelerator pedal sensor connector is properly connected.
2. no interruptions or short circuits between wires or earth in wiring harness
to accelerator pedal sensor.
Replace the accelerator pedal sensor if necessary.
If all these points are in order, contact your Allison dealer.
Main code Sub-code RECOMMENDED PROCEDURES
Speed sensors
22 14
15
16
Check the following points:
1. connectors are firmly attached, clean and undamaged.
2. the speed sensor attachment bolt is tightened to the specified torque.
3. 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.
Selector keypad
23 12
13
14
15
23
24
Check the following points:
1. ECU connections - connectors are connected and clamped.
2. selector keypad is connected and the wire loop has been cut through.
3. no interruptions or short circuits between wires or earth in wiring harness
to selector.
Replace the selector if possible.
If all these points are in order, contact your Allison dealer.
Temperature in the gearbox sump too low
24 12 Check the following points:
1. temperature is lower than -6″C.
1. If this is the case, it is a normal response to the ambient temperature.
2. If not, check whether the main gearbox is firmly connected and that
the connectors are undamaged.
If all these points are in order, contact your Allison dealer.
DAF LF Gearboxes and Clutch Service Manual
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