Allison Transmission 3000 Series User Manual

Table6–2.DTCListandDescriptions(cont'd)
DTC
Description
CHECK
TRANSLight
InhibitedOperation
Description
P0720
OutputShaftSpeed
SensorCircuit
Yes
Shiftnotinprocess,
LIRShiftinprocess,
completeshiftthenLIR.
TCMforcesVMMS
off.TCMinhibitsTCC
engagement.TCM
freezesshiftadapts.
P0721
OutputShaftSpeed
SensorCircuit
Performance
Yes
TCMfreezesshift
adapts.TCMinhibits
TCCengagement.
P0722
OutputShaftSpeed
SensorCircuitNoSignal
Yes
TCMfreezesshift
adapts.TCMinhibits
TCCengagement.DNS,
Lockincurrentrange
P0725
EngineSpeedSensor
Circuit
No
Defaulttoturbinespeed
P0726
EngineSpeedSensor
CircuitPerformance
No
Defaulttoturbinespeed
P0727
EngineSpeedSensor
CircuitNoSignal
No
Defaulttoturbinespeed
P0729
Incorrect6
th
GearRatio
Yes
DNS,Attempt5
th
,then
3
rd
P0731
Incorrect1
st
GearRatio
Yes
DNS,Attempt2
nd
,then
5
th
P0732
Incorrect2
nd
GearRatio
Yes
DNS,Attempt3
rd
,then
5
th
P0733
Incorrect3
rd
GearRatio
Yes
DNS,Attempt4
th
,then
6
th
P0734
Incorrect4
th
GearRatio
Yes
DNS,Attempt5
th
,then
3
rd
P0735
Incorrect5
th
GearRatio
Yes
DNS,Attempt6th,then
3
rd
,then2
nd
P0736IncorrectReverseRatioYes
DNS,LockinNeutral
P0741
TorqueConverterClutch
(TCC)SystemStuckOff
YesNone
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Allison Transmission 3000 Series Specifications

General

Type	Automatic Transmission Controller
Control Module	Integrated
Shift Energy Management	Yes
Number of Gears	6
Torque Converter	Yes, with lock-up clutch
Retarder	Optional
PTO Provision	Yes
Input Voltage	12V or 24V
Communication Protocol	SAE J1939
Operating Temperature Range	-40°C to +85°C