Transmission Control Module (TCM), Diagnostic Trouble ...Volvo Trucks North America Date Group No....

Transmission Control Module (TCM)

Diagnostic Trouble Codes (DTCs)VN, VHD, VAH

TTrraannssmmiissssiioonn CCoonnttrrooll MMoodduullee ((TTCCMM)),, DDiiaaggnnoossttiiccTTrroouubbllee CCooddeess ((DDTTCCss))The bulletin provides Transmission Control Module (TCM) diagnostic trouble codes (DTCs)for VOLVO VN, VHD and VAH vehicles.

CCoonntteennttss• “Transmission Control Module (TCM), Diagnostic Trouble Codes (DTCs)”, page 2

NNoottee:: Information is subject to change without notice.Illustrations are used for reference only and can differ slightly from the actual engine beingserviced. However, key components addressed in this information are represented asaccurately as possible.

SSeerrvviiccee BBuulllleettiinnVVoollvvoo TTrruucckkss NNoorrtthhAAmmeerriiccaa TTrruucckkssGreensboro, NC USA

Date Group No. Release Page9.2012 443300 1133 0011 1(50)

PPVV777766--8899007711770000USA55550 English

VVoollvvoo TTrruucckkss NNoorrtthh AAmmeerriiccaa Date Group No. Release PageSSeerrvviiccee BBuulllleettiinn 9.2012 443300 1133 0011 2(50)

TTrroouubblleesshhoooottiinnggTTrraannssmmiissssiioonn CCoonnttrrooll MMoodduullee ((TTCCMM)),, DDiiaaggnnoossttiicc TTrroouubbllee CCooddeess((DDTTCCss))NNoottee:: For some DTCs, after the component repair is made,the code may not change to inactive status until the compo-nent is activated.

Transmission Control Module, Fault Tracing“P1050, Transmission Range, Position”, page 5

“P1051, Transmission Splitter, Position”, page 6

“P1052, Clutch Cylinder, Position”, page 7

“P1053, Clutch Plates Wear, Condition”, page 9

“P1054, Transmission Tank, Air Pressure”, page 9

“P1055, Brake Switch Status”, page 9

“U3003, TCM Power Supply”, page 10

“P1057, Main Shaft Speed Sensor (SESM)”, page 10

“P1058 Counter Shaft Speed Sensor”, page 14

“P1059, Gearbox Oil Temperature Sensor”, page 17

“P105E, Transmission Shifter # 1 Position Sensor”, page 18

“P105F, Transmission Shifter # 2 Position Sensor”, page 18

“P1060, Clutch Load on Plate”, page 19

“P1061, Clutch Cylinder Slip Point Position”, page 19

“P1062, Clutch Position Sensor Supply + 5V”, page 20

“U3000, PCB Temperature Sensor”, page 20

“U0300, J1939 Communication”, page 21

“U3000, ProgramMemory”, page 20

“U3000, CalibrationMemory EEPROM”, page 21

“U3000, Digital Input Flash NVRAM ProgrammingEnable (DIEE)”, page 20

“P1063, Transmission Inclination Sensor”, page 21

“P1064, Clutch Fast Engagement Valve”, page 22

“P1065, Clutch Slow Engagement Valve”, page 23

“P1066, Clutch Fast Disengagement Valve”, page 24

“P1067, Clutch Fast Disengagement Valve”, page 25

“P1068, Fast Clutch Valves, Low Side Circuit”, page 25

“P1069, Slow Clutch Valves, Low Side Circuit”, page 26

“P106A, Gear 1 Valve, Inner Actuator for Shift Cylinder 1”, page 26

“P106B, Gear Reverse Valve, Outer Actuator for Shift Cylinder 1”, page 27


“P106C, Gear 2 Valve, Inner Actuator for Shift Cylinder 2”, page 27

“P106D, Gear 3 Valve, Outer Actuator for Shift Cylinder 2”, page 28

“P106E, PTO 1 Engagement Valve”, page 28

“P106F, PTO 2 Engagement Valve”, page 29

“P1070, Transmission Brake Valve”, page 30

“P1071, Split Engagement System”, page 31

“P1072, Range Engagement System”, page 32

“P1073, Gears 1/R Engagement System”, page 33

“P1074, Gears 2/3 Engagement System”, page 36

“P1075, Clutch System”, page 39

“P1076, Transmission Brake”, page 41


“U0100, Lost Communication with Engine Control Module (ECM)”, page 41

“U0140, Lost Communication with Vehicle ECU”, page 42

“U2005, Lost Communication with IC”, page 42

“U0103, Lost Communication with Gear Selector Control Module”, page 43

“U0129, Lost Communication with Brake Control Module (EBS/BECU)”, page 43

“U1142, Missing Data on J1939 from Brake Control Module (EBS/BECU)”, page 43

“U0132, Lost Communication with Suspension Control Module (ECS)”, page 44

“U0182, Lost Communication with Lighting Control Module (LCM)”, page 44

“U0104, Missing Data from J1939 for Adaptive Cruise Control (ACC) ECM”, page 44

“U1144, Missing Data from J1939 for Bodybuilder Module (BBM)”, page 44

“U0073, Lost Communication with ECM on Powertrain CAN”, page 45

“P107B Missing Data on J1939 from VMCU (VECU)”, page 49



“P105A, High Range Valve (VAHR)”, page 46

“P105B, Low Range Valve (VALR)”, page 47

“P105C, Direct Split Valve (VADS)”, page 48

“P105D, Indirect Split Valve (VAIDS)”, page 49


P1050, Transmission Range, PositionTTyyppee ooffffaauulltt::

FFTTBBDDeessccrriippttiioonn::

FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibbllee CCaauussee::

FTB 17 • Voltageabove nor-mal, orshorted tohigh source

• Status from appli-cation-specific in-tegrated circuit(ASIC) is shortcircuit to U-BATT

• Slow gear changes

• Yellow lamp is illuminated

• N/A

FTB 18 • Current be-low normal oropen circuit

• Status from ASICis open circuit



• N/A

FTB 19 • Currentabove nor-mal orgroundedcircuit

• Status from ASICis short circuit toground



• N/A

FTB 54 • Calibrationvalue out ofrange

• The checksum inNVRAM is notcorrect or, thesensor has notbeen calibrated.


• Cranking is inhibited

• Engine cannot start

• N/A


P1051, Transmission Splitter, PositionTTyyppee ooffffaauulltt::


FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibblleeCCaauussee::


• Status from ASICis short circuit toU-BATT



• N/A





• N/A

FTB 19 • Currentabove nor-mal orgroundedcircuit




• N/A






• N/A


P1052, Clutch Cylinder, PositionTTyyppee ooffffaauulltt::


FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibblleeCCaauussee::

FTB 62 • Data erratic,intermittent,or incorrect

• The differencebetween clutchpositions indi-cated by the sen-sor signal(SEPoC) and theinverted sensorsignal (SEPo-CINV) is to largeand both signalsare within normalrange


• Slow clutch performance

• Rough shifting at start and at slow speed


• N/A


• Sensor signal isshort circuit toUBATTor sensorsupply when: atleast one of thesensor signals isabove normalrange





• N/A


• Open circuit onany of the sensorsignals is de-tected when: oneof the sensor sig-nals is within nor-mal range andthe other sensorsignal is belownormal range

• Open circuit onground is de-tected when boththe sensor sig-nals are withinthe normal rangeand the sum ofthe sensor sig-nals is above aspecific value





• N/A


TTyyppee ooffffaauulltt::


FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibbllee CCaauussee::

FTB 29 • Faulty deviceorcomponent

Both sensor signalsare below normalwhen:

• Status of the sen-sor ASIC is inter-nal fault on thesensor or

• Short circuit toground on any ofthe sensor sig-nals or

• Open circuit onsupply or

• Short circuit be-tween the twosensor signals





• N/A






• N/A


P1053, Clutch Plates Wear, ConditionTTyyppee ooffffaauulltt::

FFTTBB DDeessccrriippttiioonn:: FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibblleeCCaauussee::

FTB 78 • Data valid butabove normal op-erational range

• The clutch wear ismore than orequal to "SERV-ICE DUEPOSITION"


• If active for a long period of time theclutch may completely wear out and fail

• N/A

P1054, Transmission Tank, Air PressureTTyyppee ooffffaauulltt::



• Sensor signal isin normal range

• Pressure is above10.0 bar (145PSI)



• N/A

FTB 21 • Data valid but belowoperational range

• Sensor signal isin normal range

• Pressure is below5.0 bar (72.5 PSI)


• The symbol for compressed air, transmis-sion is illuminated

• Gear changes may be absent


• N/A

FTB 17 • Voltage above nor-mal or shorted high

• The sensor signalis above normalrange

• Yellow lamp is illuminated • N/A

FTB 18 • Current below nor-mal or open circuit

• The sensor signalis below normalrange


P1055, Brake Switch StatusTTyyppee ooffffaauulltt::


FTB 94 • Special Instructions • The gear lever ismoved from neu-tral or “FOLD” po-sition without priorapplication of theservice brake

• White lamp is illuminated together withpop up message

• The transmission will not engage the se-lected gear (stays in neutral)

• N/A


U3003, TCM Power SupplyTTyyppee ooffffaauulltt::



• 12 Volt System:Voltage is above19 V



• 12 Volt System:Voltage is below 9V and the enginehas been runningfor 5 seconds


• Reduced transmission performance

• N/A

P1057, Main Shaft Speed Sensor (SESM)TTyyppee ooffffaauulltt::



• The sensor signalis within normalrange and,

• The main shaftspeed differs fromboth the value ofthe countershaftspeed and the ve-hicle speed re-ceived from thevehicle ECU

The following condi-tions must be fulfilledfor a time of 2.0 sec-onds in order toactivate:

• A gear (not neu-tral) is engaged inthe transmission

• The value of theinput shaft speedcalculated fromthe main shaftspeed sensor(SESM) is morethan 300 rpm

• The value of theinput shaft speedcalculated fromthe counter shaftspeed sensor(SESC) is morethan 300 rpm



• Rough gear changes

• N/A




FTB 21 (Continued) • The values of theinput shaft speedcalculated fromthe main shaftspeed sensor(SESM) and thecounter shaftspeed sensor(SESC) differmore than 50 rpm

• The values of theinput shaft speedcalculated fromthe main shaftspeed sensor(SESM) and thevehicle speed re-ceived from theVehicle ECU differmore than 30 rpm

• The values of theinput shaft speedcalculated fromthe counter shaftspeed sensor(SESC) and thevehicle speed re-ceived from theVehicle ECU differless than 30 rpm




FTB 29 • Data erratic, inter-mittent, or incorrect

• The sensor indi-cates wrongdirection

The following condi-tions must be fulfilledfor a time of 2,0 sec-onds in order toactivate:

• The input shaftspeed calculatedfrom the counter-shaft speed sen-sor (SECS) isabove 300 rpmand the clutch isengaged or

• The input shaftspeed calculatedfrom the counter-shaft speed sen-sor (SECS) isabove 600 rpmand the clutch po-sition is more en-gaged than theslip point and theengine speed isreceived from theengine ECM andabove 600 rpm

• A forward gear isengaged in thetransmission andthe mainshaftspeed sensor(SESM) indicatesreverse move-ment or

• A reverse gear isengaged and themainshaft speedsensor (SESM)indicates forwardmovement

• There is no otheractive fault on thesensor for themain shaft speed(SEMS)



• N/A





• Signal or supplyvoltage is abovenormal range




• N/A

FTB 16 • Voltage below nor-mal or shorted low

• Signal and supplyvoltage is belownormal range




• N/A


• Signal voltage isbelow normalrange

• Supply voltage isin the normalrange




• N/A


P1058 Counter Shaft Speed SensorTTyyppee ooffffaauulltt::



• The sensor signalis within normalrange and,

• The counter shaftspeed differs fromboth the mainshaft speed(SESM) and thevehicle speed re-ceived from theVehicle ECUwhen the countershaft is rotating

The following condi-tions must be fulfilledfor a time of 2.0 sec-onds in order toactivate:

• A gear (not neu-tral) is engaged inthe transmission

• The value of theinput shaft speedcalculated fromthe main shaftspeed sensor(SESM) is morethan 300 rpm

• The value of theinput shaft speedcalculated fromthe counter shaftspeed sensor(SESC) is morethan 300 rpm



• Transmission brake up-shifts cannot beused

• Engagement point not functioningproperly

• Starting gear can only be engaged whenthe vehicle is stationary or when the ve-hicle speed is high enough to synchronizethe transmission with the engine

• N/A




FTB 21 (Continued) • The values of theinput shaft speedcalculated fromthe counter shaftspeed sensor(SESC) and themain shaft speedsensor (SESM)differ more than50 rpm

• The values of theinput shaft speedcalculated fromthe counter shaftspeed sensor(SESC) and thevehicle speed re-ceived from theVehicle ECU differmore than 30 rpm

• The values of theinput shaft speedcalculated fromthe main shaftspeed sensor(SESM) and thevehicle speed re-ceived from theVehicle ECU differless than 30 rpm











• N/A








• N/A


P1059, Gearbox Oil Temperature SensorNNoottee:: P1059 has three levels of severity, low, medium andhigh. All times are reset when the key is switched off.



FTB 22(Low)

• Data valid butabove normal op-erational range

• The sensor signalis in normal range

• Temperature isabove 100°C(212°F) during 5hours


• Symbol for high transmission oil tempera-ture is lit

• N/A

FTB 92(Medi-um)



• Temperature isabove 120°C(248°F) during 10minutes



• N/A

FTB 98(High)



• Temperature isabove 140 °C(284°F) during 30s

• Red stop lamp is illuminated


• N/A








P105E, Transmission Shifter # 1 Position SensorTTyyppee ooffffaauulltt::






• N/A





• N/A

FTB 19 • Current above nor-mal or groundedcircuit




• N/A

FTB 54 • Calibration valueout of range

• The checksum inNVRAM is notcorrect or

• The sensor hasnot beencalibrated




• N/A

P105F, Transmission Shifter # 2 Position SensorTTyyppee ooffffaauulltt::






• N/A





• N/A





• N/A


• The checksum inNVRAM is notcorrect or

• The sensor hasnot beencalibrated




• N/A


P1060, Clutch Load on PlateTTyyppee ooffffaauulltt::



• The calculatedstored energy isabove 200 kJ

• The energy calcu-lation is timebased for VTNAand physical forothers


• The clutch is overheated

• The clutch is slowly engaged

• N/A

FTB 74 • Clutch protectionactive (unidentifi-able error)

• Clutch slip morethan 8.0 secondswith vehiclemovement lessthan 0.8 m (32 in)(e.g. hill holdingevent)


• There has been unnecessary clutch slip

• The clutch is slowly engaged

• N/A

FTB 92 • Special instructions • Attempt to start inhigh range inmanual position

• White lamp is illuminated

• Not possible to start

• N/A

P1061, Clutch Cylinder Slip Point PositionTTyyppee ooffffaauulltt::



• The checksum inNVRAM is notcorrect

• The slip point hasnot beencalibrated


• It is not possible to drive the vehicle

• N/A


P1062, Clutch Position Sensor Supply + 5VTTyyppee ooffffaauulltt::



• Voltage is abovenormal range



• Uneven shifting at start and at slow speed


• N/A

FTB 18 • Data valid but be-low operationalrange

• Voltage is belownormal range





• N/A

U3000, PCB Temperature SensorTTyyppee ooffffaauulltt::


FTB 4B • Data valid butabove normal op-erational range

• Temperature isabove 125°C(257°F)


U3000, Digital Input Flash NVRAM ProgrammingEnable (DIEE)TTyyppee ooffffaauulltt::

FFTTBB DDeessccrriippttiioonn:: FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibbllee CCaauussee::


• The voltage levelfor the DIEE pin ishigh




• All communication with the con-trol module is disabled except forprogramming of MSW

• N/A

U3000, ProgramMemoryNNoottee:: The boot program only sets this DTC during power-up. The boot program does not save any DTC.




• Faulty data in pro-gram memory




• N/A

FTB 81 • Incorrect • N/A • N/A • N/A


FTB 55 • Test software • N/A • N/A • N/A

FTB 41 • General checksumfailure

• N/A • N/A • N/A

U3000, CalibrationMemory EEPROMTTyyppee ooffffaauulltt::



• Flash checksumdataset error

• Program codemissing




• N/A

U0300, J1939 CommunicationTTyyppee ooffffaauulltt::


FTB 55 • Test software • N/A • N/A • N/A

FTB 81 • Data Incorrect • N/A • N/A • N/A

P1063, Transmission Inclination SensorTTyyppee ooffffaauulltt::



• The sensor signalis above or belownormal range

• The vehicle hasbeen standing stillfor a specific time


• The start gear may be wrong

• Gear selection performancemight bereduced

• Downhill and uphill gear change perform-ance may be reduced

• N/A


P1064, Clutch Fast Engagement ValveTTyyppee ooffffaauulltt::



• The high-sidedrive is short cir-cuit to U-BATTand

• There is no activeDTC for short cir-cuit to U-BATTonVAF-


• Erratic clutch performance



• N/A


• The high-sidedrive is opencircuit





• N/A


• The high-sidedrive is short cir-cuit to ground





• N/A


P1065, Clutch Slow Engagement ValveTTyyppee ooffffaauulltt::




• There is no activeDTC for short cir-cuit to U-BATTonVAS-




• N/A






• N/A






• N/A


P1066, Clutch Fast Disengagement ValveTTyyppee ooffffaauulltt::




• There is no activeDTC for short cir-cuit to U-BATTonVAF-





• N/A







• N/A







• N/A


P1067, Clutch Fast Disengagement ValveTTyyppee ooffffaauulltt::




• There is no activeDTC for short cir-cuit to U-BATTonVAS-




• N/A






• N/A






• N/A

P1068, Fast Clutch Valves, Low Side CircuitTTyyppee ooffffaauulltt::



• The low-sidedrive is short cir-cuit to U-BATT





• N/A


• The low-sidedrive is short cir-cuit to ground and

• There is no activeDTC for short cir-cuit to ground onVAFE or VAFD





• N/A


P1069, Slow Clutch Valves, Low Side CircuitTTyyppee ooffffaauulltt::



• The low-side driveis short circuit toU-BATT




• N/A


• The low-side driveis short circuit toground and

• There is no activeDTC for short cir-cuit to ground onVASE or VASD




• N/A

P106A, Gear 1 Valve, Inner Actuator for Shift Cylinder 1TTyyppee ooffffaauulltt::



• The high-sidedrive is short cir-cuit to U-BATT


• The valve is activated

• Incorrect gear selection

• N/A




• The valve cannot be activated


• N/A






• N/A


P106B, Gear Reverse Valve, Outer Actuator for Shift Cylinder 1TTyyppee ooffffaauulltt::







• N/A






• N/A






• N/A

P106C, Gear 2 Valve, Inner Actuator for Shift Cylinder 2TTyyppee ooffffaauulltt::







• N/A






• N/A






• N/A


P106D, Gear 3 Valve, Outer Actuator for Shift Cylinder 2TTyyppee ooffffaauulltt::







• N/A






• N/A






• N/A

P106E, PTO 1 Engagement ValveTTyyppee ooffffaauulltt::






• The PTO cannot be deactivated


• N/A





• The PTO does not work

• N/A






• N/A


P106F, PTO 2 Engagement ValveTTyyppee ooffffaauulltt::






• The PTO cannot be deactivated


• N/A






• N/A






• N/A


P1070, Transmission Brake ValveTTyyppee ooffffaauulltt::





• The valve and the brake are activated

• The transmission will be damaged if thevehicle drives

• The drive shaft has to be removed tomove the vehicle

• N/A






• N/A






• N/A


P1071, Split Engagement SystemTTyyppee ooffffaauulltt::


FTB 94 • Unintentional disen-gagement of indi-rect split

• Low split jumpsout

• The split cylindervalves areinactive


• Loss of torque

• N/A

FTB 96 • Unintentional disen-gagement of directsplit

• High split jumpsout



• Loss of torque

• N/A

FTB 79 • Unintentional disen-gagement of neutralsplit

• The split cylinderposition leavesthe neutralposition



FTB 92 • Blocked engage-ment of neutral split

• The neutral splitgear cannotengage


• Eco roll not available

• N/A

FTB 77 • Blocked engage-ment of indirect split

• The indirect splitgear can notengage


• Loss of torque



• N/A

FTB 97 • Blocked engage-ment of direct split

• The direct splitgear can notengage


• Loss of torque



• N/A


P1072, Range Engagement SystemTTyyppee ooffffaauulltt::


FTB 94 • Unintentional disen-gagement of lowrange

• The range cylin-der leaves the lowrange position

• The range cylin-der valves areinactive


• Loss of torque

• N/A

FTB 92 • Unintentional disen-gagement of highrange

• The range cylin-der leaves thehigh rangeposition

• The range cylin-der valves areinactive


• Loss of torque

• N/A

FTB 77 • Blocked engage-ment of low range

• The low rangegear can notengage


• Loss of torque


• N/A

FTB 97 • Blocked engage-ment of high range

• The high rangegear can notengage


• Loss of torque


• N/A


P1073, Gears 1/R Engagement SystemTTyyppee ooffffaauulltt::


FTB 96 • Unintentional disen-gagement of firstgear

• The 1/R cylinderleaves the 1stposition

• The 1st cylindervalves areinactive


• Loss of torque

• Control housing detentassembly

• Brass lugs

• Transmission controlmodule (TCM)

• Cylinder stroke

• Clutch teeth, engagingsleeve

• Piston rod

• Main shaft hub

• Gear wheel

FTB 92 • Unintentional disen-gagement of re-verse gear

• The 1/R gearleaves the re-verse position

• The 1/R cylindervalves areinactive


• Loss of torque


• Brass lugs


• Cylinder stroke

• Clutch teeth, engagingsleeve

• Piston rod

• Main shaft hub

• Gear wheel


FTB 94 • Unintentional disen-gagement of neutral

• The 1/R cylinderleaves the neutralposition

• The 1/R cylindervalves areinactive


• Loss of torque



• Brass lugs


• Cylinder stroke

• Piston rod

FTB 71 • Blocked engage-ment of neutral

• The 1/R cylindercannot reach neu-tral position whenrequested




• Brass lugs


• Seals, solenoid valve

• Piston rod

• Engaging sleeve




FTB 97 • Blocked engage-ment of first gear

• The 1st gear cannot engage and,

• There is no activeDTC on the SE-Po1R and,

• There is no activeDTC for low airpressure and,

• There is no activeDTC on any of the1st and reversegear cylindervalves


• Loss of torque


• The 1st gears will not be se-lected by the system for a shortwhile after five successful gear-shifts a new attempt to use 1stgear may be made


• Brass lugs



• Gear and engagementClutch teeth

• Piston rod

• Gear wheel

FTB 77 • Blocked engage-ment of reversegear

• The reverse gearcannot engage


• The R gear can not engage, butthe system will try to engage itas log as the gear lever is in thereverse position


• Brass lugs



• Gear and engagementclutch teeth

• Piston rod

• Gear wheel


P1074, Gears 2/3 Engagement SystemTTyyppee ooffffaauulltt::


FTB 96 • Unintentional disen-gagement of sec-ond gear

• The 2/3 cylinderposition indicatesthat the 2/3 gearleaves the 2ndposition

• The cylindervalves areinactive


• Loss of torque


• Brass lugs


• Cylinder stroke

• Clutch teeth engagingsleeve

• Piston rod

• Main shaft hub

• Gear wheel

FTB 92 • Unintentional disen-gagement of thirdgear

• The 2/3 cylinderleaves the 3rdposition

• The 3rd cylindervalves areinactive


• Loss of torque


• Brass lugs


• Cylinder stroke

• Clutch teeth engagingsleeve

• Piston rod

• Main shaft hub

• Gear wheel


FTB 94 • Unintentional gearengagement

• The split cylinderposition leavesthe neutralposition


• Yellow lamp is illuminated • Control housing detentassembly

• Brass lugs


• Cylinder stroke

• Piston rod

FTB 71 • Blocked engage-ment of neutral

• The 2/3 gear cyl-inder cannotreach neutral po-sition whenrequested




• Brass lugs



• Piston rod

• Engaging sleeve




FTB 97 • Blocked engage-ment of secondgear

• The 2nd gear cannot engage


• Loss of torque


• The 2nd gear will not be selectedby the system for a short whileafter five successful gearshifts anew attempt to use 2nd gearmay be made


• Brass lugs

• Transmission ControlModule (TCM)



• Piston rod

• Gear wheel

FTB 77 • Blocked engage-ment of third gear

• The 3rd gear can-not engage


• Loss of torque


• The 3rd gear will not be selectedby the system for a short whileafter five successful gearshifts anew attempt to use 3rd gear maybe made


• Brass lugs




• Piston rod

• Gear wheel


P1075, Clutch SystemTTyyppee ooffffaauulltt::


FTB 94 • Unintentional disen-gagement of theclutch

• The clutch disen-gages when notcommanded and,

• There is no activeDTC on the SE-PoC and,


• There is no activefault code on anyof the clutch cylin-der valves and,

• The PCB temper-ature is above aspecific limit




• Clutch valve assembly

FTB 92 • Unintentional en-gagement of theclutch

• The clutch en-gages when notcommanded and,

• There is no activeDTC on the SE-PoC and

• There is no activeDTC for low airpressure and

• There is no activeDTC on any of theclutch cylindervalves and,

• The PCB temper-ature is above aspecific limit




• Clutch cylinder


• Clutch cylinder air hose

• Clutch cylinder airconnection




FTB 77 • Mechanical systemnot responding orout of adjustment

• The clutch doesnot disengage/en-gage properlywhen com-manded and,

• There is no activeDTC on the SE-PoC and,

• The mechanicalsystem of theclutch does notwork correctly


• There is no activeDTCon any of theclutch cylindervalves and,

• The PCB temper-ature is above 10°C (50°F)




• Clutch

• Clutch cylinder

• Clutch cylinder air hose


• Clutch valve assemblyair supply

FTB 38 • Clutch system • Low system airpressure

• Set point forclutch positioncan not bereached usingnormal actuatorcontrol. Limit forusing actuatorvalves exceeded.Clutch position isoutside toleranceat disengagedposition


• Harsh start

• Harsh shifting

• Slow shifting

• Slow clutch engagement at start

• Air leakage from thefollowing component(s): clutch cylinder,clutch valve assembly,clutch cylinder air hose,clutch cylinder airconnection

FTB 74 • Clutch drag • The clutch trans-fers too much tor-que in thedisengagedposition


• The vehicle tends to creep onflat ground at idle

• The clutch wear is high

• Clutch

• Warped flywheel

• Transmission inputshaft

FTB 71 • Unintentional clutchslip

• The clutch cannottransfer a specifictorque withoutslipping


• The engine torque is reduced sothat the clutch does not continueto slip

• Clutch




FTB 75 • Clutch system • Not possible todisengage theclutch


• Not possible to disengage theclutch

• Engine shut down

• Not possible to shift gears

• Not possible to engage neutralgear position

• N/A

P1076, Transmission BrakeTTyyppee ooffffaauulltt::


FTB 94 • Mechanical systemnot responding orout of adjustment

• The transmissionbrake does notbrake when thevalve is activated


• Slow gear changes at standstill

• N/A

U0100, Lost Communication with Engine Control Module (ECM)TTyyppee ooffffaauulltt::


FTB 00 • Abnormal updaterate

• Message missingon SAE J1939 da-ta link from theengine controlmodule (ECM)


• If there is no CAN 2 data link, au-tomatic gear selection entersbackup mode with gear changesonly at certain vehicle speeds

• If there is no CAN 2 data link andif the engine does not receivemessages from the TCM, thegear changes will be slow

• N/A


U0140, Lost Communication with Vehicle ECUTTyyppee ooffffaauulltt::



• Message missingon SAE J1939 da-ta link engine con-trol module(ECM)


• Automatic gear selection entersbackup mode with gear changesonly at certain vehicle speeds

• Rough shifting at start and atslow speed

• N/A

U2005, Lost Communication with ICTTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the brakeECU (MID 136) isnot received



• N/A


U0129, Lost Communication with Brake Control Module (EBS/BECU)TTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the brakeECU (MID 136) isnot received



• N/A

U1142, Missing Data on J1939 from Brake Control Module (EBS/BECU)TTyyppee ooffffaauulltt::


FTB 86 • Abnormal fre-quency, pulse width,or period

• This FTB shall beset if the wheelspeeds from thebrake ECU (MID136) are notcorrect.



• N/A

U0103, Lost Communication with Gear Selector Control ModuleTTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the gear se-lector controlmodule (MID 223)is not received


• Slow response on manual gearchanges and slow responsewhen buttons on the gearleverare pressed.

• N/A


U0132, Lost Communication with Suspension Control Module (ECS)TTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the LCM(MID 216) is notreceived


• The start gear might be wrong

• Automatic gear selection per-formance might be reduced acertain time after start

• Automatic gear selection per-formance might be reduced acertain time after a trailer hasbeen connected/disconnected

• N/A

U0182, Lost Communication with Lighting Control Module (LCM)TTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the LCM(MID 216) is notreceived


• The start gear might be wrong

• Automatic gear selection per-formance might be reduced acertain time after start

• Automatic gear selection per-formance might be reduced acertain time after a trailer hasbeen connected/disconnected

• N/A

U0104, Missing Data from J1939 for Adaptive Cruise Control (ACC) ECMTTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the ECU(MID 219) is notreceived and,

• ACC is installed


• The retarder ACC function doesnot work

• N/A

U1144, Missing Data from J1939 for Bodybuilder Module (BBM)TTyyppee ooffffaauulltt::



• This FTB shall beset if the messagefrom the ECU(MID 219) is notreceived and,

• ACC is installed


• The retarder ACC function doesnot work

• N/A


U0073, Lost Communication with ECM on Powertrain CANTTyyppee ooffffaauulltt::


NNoottee:: This DTC is valid for vehicles where a CAN 2 data link exists between the TCM and the engine


• CAN 2 data linkcommunicationdoes not work


• Slow gear shifts

• N/A


• Message missingon SAE J1939 da-ta link from thefollowing controlmodule: EngineControl Module(ECM)



• N/A


P105A, High Range Valve (VAHR)TTyyppee ooffffaauulltt::






• Low range gears are missing


• N/A





• High range gears are missing


• N/A





• Range gears are missing


• N/A


P105B, Low Range Valve (VALR)TTyyppee ooffffaauulltt::






• High range gears are missing


• N/A





• Low range gears are missing


• N/A





• Range gears are missing


• N/A


P105C, Direct Split Valve (VADS)TTyyppee ooffffaauulltt::






• Indirect and neutral split gearsare missing


• N/A





• Splitter gears are missing


• N/A







• N/A


P105D, Indirect Split Valve (VAIDS)TTyyppee ooffffaauulltt::






• Direct and neutral split gears aremissing


• N/A







• N/A







• N/A

P107B Missing Data on J1939 from VMCU (VECU)TTyyppee ooffffaauulltt::

FFMMII DDeessccrriippttiioonn:: FFaauulltt CCoonnddiittiioonn:: PPoossssiibbllee SSyymmppttoommss:: PPoossssiibbllee CCaauussee::

FTB 86 • Abnormal fre-quency, pulse widthor period

• N/A • N/A • N/A





• CAN 2 data linkcommunicationdoes not work



• N/A




• N/A • N/A • N/A

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Transmission Control Module (TCM), Diagnostic Trouble ...Volvo Trucks North America Date Group No....

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