. . NOTE: Once TCM Autoselect locks, the only way to reactivate is to perform a reset procedure (refer to Paragraph 38). Appendix A deals with the identification of potential circuit problems. . . . . PTO mounting pads. . . . . . . . . . . . . The rest is in the PCM. . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. . . . . Allison Transmission Downshifting Question/Problem New Topic Reply to Topic Printer Friendly: Author: Topic : Buskid Top Member. The PTO input to the TCM indicates the PTO is OFF. . . . . . . . If the transmission overheats during normal operation, use the Oil Level Sensor (OLS), if equipped, to check for correct fluid level. . The tools listed below are available for purchase from SPX/Kent-Moore. . . . . . This wiring configuration is designated TID A. 1. . . . . . Specific instructions for using many of the available or required service tools and equipment are not included in this manual. 17 16. . New fluid is displayed as 99 percent. . . . . . . An Over View on Allison Automatic Transmission Wiring We didn't experience the New World Transmissions from Allison until 1995. Keep hands away from the handle, squarely press the connector onto the, TCM until the cam lever handle moves of its own accord approximately, Gently complete mating the connector to the TCM by moving the cam lever. . . . . . . . . Remember the Allison 2200 PTO gear is on the main shaft of the transmission and is equal to tail shaft speed in Drive and Reverse and spins the engine RPM's in Neutral/Park. Give us a call at 877-776-4600 or 407-872-1901. . . . . . . . . . . SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES, 6-5. . . A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. . . . . . 56, 55 HOT CHECK . . . . IT IS YOUR RESPONSIBILITY to be completely familiar with the warnings and cautions used in this manual. 21 22. . Do this for both wires in the circuit being tested. . Using genuine Muncie repair parts is key to the life of your PTO. . . Typical Allison 4th Generation Control Components. . . The . . . . . The indicator is lit upon each initialization of the TCM, and remains on for approximately 1 2 minutes after the first selection of a drive range, until service is performed and the indicator is reset. . th. . . . . . The oil level sensor (OLS) is a float type device mounted on the control module channel plate. . . SCTI will have parts catalogs available. . . . Second. OM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates when transmission fluid needs to be changed. . . . . Display the Oil Life Monitor information and press and hold the MODE button of the Allison shift selector for 10 seconds. . . . The transmission is considered to be overheated when any of the temperatures in Table 32 are exceeded:. . . . . . . . Learn how you can ensure the performance and durability of your Allison transmission. . . . . Refer to Appendix A if a circuit problem is suspected. . . A temperature sensor (thermistor) is located in the internal wiring harness. . Figure 13. . . . . . Because of the time lag involved with writing and printing . . . . . Common Allison 3000 Transmission Problems. . . . . . If resets are restricted to the service tool, the selector will not be able to reset the function. . . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . . . . . . . . 58, 57 FLUID RECOMMENDATIONS . . . . Description of diagnostic codes, system responses to faults, and troubleshooting. . Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . Illumination of the CHECK TRANS light indicates that a condition was detected that requires service attention. clutches are applied to lock the transmission output. . . . . . . . *NOTE: The first number displayed in the digital display is the highest forward range available and second number is range attained in selected position. . . . . . 71 72. . If the ignition cycle counter completes the 35 cycles before there are three consecutive detections of a retarder, the software will log that there is no retarder and the retarder autodetect logic will stop. . . . The Diagnostic Trouble Code section lists DTCs and their description. If yours appears to have never been replaced, your best bet is to contact the manufacturer and ask about the replacement process. . . . . . . . . . . . . . 114, 18. . . Welcome to the TS3989EN Troubleshooting Manual. . . 4.Test drive the vehicle to confirm a DTC or performance complaint. . . . . NOTE: If an OLS is known to be present but has not been detected, a possible cause is that the transmission fluid level is too low. . OM History: A historical record of the last 6 resets, including mileage at the time of each reset, may be viewed using the Allison DOC For PCService Tool . . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. install a new TCM. . . When the counter for any of the sources indicates five consecutive detections, the software will set a confidence flag to indicate that this is an available throttle source. . . . . . . This occurs when the remaining clutch life reaches. . . . . . . . . . . . . . . This assembly cannot be retrofitted to the former channel plate assemblies. . 53 53. . The Allison 4th Generation Controls feature closed-loop clutch control to provide superior shift quality over a wide range of operating conditions. 4.Review the Allison 4th Generation Controls wire numbering system described in Paragraph 34. . . . . will cause severe overheat damage to the transmission. . . . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . . . . . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . . . Internet connection capability with Internet Explorer 5.0.1 or greater. . . . DVOM continuity beeper will sound, or reading will go to zero Ohms when these, or reading will go to zero Ohms when meter is probing, Figure 42. . . . . Shorts involve. . . They have a 24 bolt bell housing with approx 21 inch diameter pattern. . . . . . Engage PTO, raise box, push clutch in, put in gear, and . . Allison Transmission (AT) is responsible for warranty on these parts. . . . . Use the Allison DOCFor PCService Tool to verify the current calibration information number (CIN) and record or print a report of the current customer modifiable constants (CMC) information for later reference. HYDRAULIC OPERATION DURING ELECTRICAL INTERRUPTION. . . Allison. . . . . . . . . If your implement/pump will fit, it is PTO capable. What Might be Wrong with Your Transmission, The Allison transmission 1000 model has a feature called limp mode, in which the transmission locks itself into third gear. Copyright 2008 Allison Transmission, Inc. P.O. . . By Brett Wolfe, F252125. Both types have the same part number 23014539. . Remember to do the following when testing for shorts and opens: Minimize movement of wiring harnesses when looking for shorts. . . . . When SS1 is energized, control main pressure flows to the top of C1 and C2 latch valves. The TCM uses a single 80-way connector, which is used to receive input from the following: Many harnesses will include a bulkhead fitting to separate cab and chassis components. . . . . . . * A power take-off (PTO) is optional on the Allison 1000 in the 3500 cab and chassis trucks. . . . . . . After a number of warnings occur from the SERVICE TRANS indicator without correcting the condition, the CHECK TRANS light illuminates and DTC P2789, Clutch Adaptive Learning at Limit, activates. . . . . . The Allison 4th Generation controls system includes a main modulation solenoid. . Allison DOC For PCService Tool uses a Windows style graphical user interface (GUI) and includes: User selected views of multiple transmission parameters, Active and historical diagnostic trouble codes (DTCs), Graphical instrument panel view of transmission parameters, Code driven links to embedded Allison 4th Generation Control System Troubleshooting Manuals, Reprogramming capability (available after satisfying Allison Transmission training certification requirements), Demo Mode which allows the user to practice the program without being connected to a vehicle, New animated screen by screen help support (found in Help, Video-based training materials, Allison DOC For PCService Tool Training Videos). . . . . The voltage signal indicates the throttle position and, in combination with other input data, determines shift timing. . . . This publication is revised periodically to include improvements, new models, special tools, and procedures. Hot Check Procedure. . . . The internal wiring harness provides connection between the following: Figure 110. . ELECTRONIC FLUID LEVEL READING (SHIFT SELECTOR), 6-4. . . . NOTE: For the latest requirements, please refer to www.allisontransmission.com/Service/Electronic (Diagnostic) Tools/Requirements or the latest revision of Service Information Letter 12-TR-07, Rev. Polyethylene 540 m/s. . . All Highway Series transmissions are programmed to restrict full operation until specific fluid temperatures are reached. . 64 66. C.Operation of Filter Life Valve and Pressure Switch (PS2). . . . . . Replace PTO housing, gears. The crates are all stamped with nsn 2520-01-257-3880. . . . . . The turbine speed sensor is directed at the rotating-clutch housing. . Allison 4th Generation Internal Wiring Harness, Figure 111. . . . . . . . . . . CODE READING AND CODE CLEARING. Allison Transmission could not possibly know, evaluate, or advise the service trade of all conceivable procedures by which service might be performed or of the possible hazardous consequences of each procedure. The 3700 SP, 4700 RDS, 4700/ 4800 EVS, 4700/4800 SP, and 4700 OFS have up to seven forward ranges and one reverse. . Topics include Power Take-Off (PTO) operation, shift selectors, prognostics, diagnostics, care and maintenance and even driving tips. . . . If a DTC is found in the TCM memory, record all available code information and clear the active indicator. If the problem recurs, proceed with Step (4). . . Depending upon the cause for the CHECK TRANS light illumination, the TCM may or may not respond to shift selector requests. . . . . Once a confidence flag is set, that source is used as the source for the throttle signal. The solenoids produce an output pressure that is proportional to current from the TCM. If dirty or corroded terminals are the probable cause of the problems, reconnect the clean connectors and operate the vehicle normally. . . . . . . . . If the problem recurs, proceed with Step (4). . . . . Allison DOC For PCService Tool shows PS2 PRESSURIZED. . . . . . . BEGINNING THE TROUBLESHOOTING PROCESS, 3-7. . . Make sure all connectors are tightly connected and. . . . . . . . . . . . . . . . Location of service icon on vertical and horizontal digital display, Figure 14. . . . . . . . . . . . Allison Transmission is the worlds largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and is a leader in hybrid-propulsion systems for city buses. . . Do this for both wires in the circuit being tested. Subject: anyone ever put a chelsea pto on a allison automatic? . . . . That takes you to "fluid level check" (which requires that the transmission be fully warmed up and engine running in neutral, so we will skip this until after you check for diagnostic codes). . . . . . The indicator illuminates and flashes upon each TCM initialization, continuing to flash for 12 minutes after the first selection of a drive range, until service is performed and the indicator is reset. . . . . . . . . . . . . N1 P. INPUT/OUTPUT FUNCTIONS . . . . . . . . Oil Level Sensor (OLS) . Throttle Position Sensor (Without Mounting Brackets). . . . . Check wiring for damaged/melted wires. * Some transmissions used in oil field service default to neutral, 41. . . . . . . . . . . . . . Even if the vehicle is moving. . . NOTE: Is used when an operating procedure, practice, etc., is essential to highlight. . . . This manual provides troubleshooting information for the 3000 and 4000 Product Families Transmissions. . . . . . . . . . . . . . . . . DIAGNOSTIC CODE TROUBLESHOOTING . Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . . . Care should be taken when welding on a vehicle equipped with electronic controls. 20-WAY TRANSMISSION FEEDTHROUGH HARNESS CONNECTOR, Figure 12. . If temperatures do not decrease, reduce the engine rpm. . . . . . . Terminals may have been bent or lost the necessary tension to maintain firm contact. SPEED SENSORS. . Isolate and repair the short. . . . Reset may be necessary if a device known to be present is not detected or if an autodetectable component or sensor was added after the initial vehicle build. . Your Allison transmission could be experiencing a part failure, in which case your best bet is to take advantage of the providers warranty. . . . . . Filter Life Valve Hydraulic Schematic. . The Prognostics Package includes the following functions: Use the Allison DOC For PCService Tool to review the current status of any of these functions and a history of indicator resets. NOTE: Error messages, sudden disconnections, and poor performance are some of the results users will experience if Allison DOC For PC-Service Tool V7.x.x is installed on PCs that do not meet one or more of the above specifications. . . . . . . . . . . . Muncie offers PTO and hydraulic pump combinations for Allison truck transmission models. However, there are instances when the . . VEHICLE INTERFACE MODULE (Figure 112). . Refer to Section 6. . . . . . . . . . . . . . . . . . . . Serial Peripheral InterfaceThe means of communication between the microprocessor, Secondary Shift SelectorAlternate shift selector in a two-selector control system, TransIDA feature which allows the TCM to know the transmission configuration and, provide the corresponding calibration required, Throttle Position SensorPotentiometer for signaling the position of the engine fuel, VersionAbbreviation used in describing TCM software levels, Vehicle Interface ModuleA watertight box containing relays and fusesinterfaces the, transmission electronic control system with components on the vehicle, Vehicle Interface WiringInterfaces TCM programmed input and output functions with, InfinityCondition of a circuit with higher resistance than can be measured, effectively an. . . . . . . . . . . . . Table 33 lists the operating range and pre-determined default range the transmission will shift to in the event of an electrical interruption. . Output voltage from the TPS is directed to the TCM through the external harness. . . . INPUT FUNCTIONS . . . . . . . . . . Refer to Section 6, Diagnostic Trouble Codes, for the code clearing procedure. . . . Find a facility. . . . . . . . . . If you have any questions, we have a team of experts standing by to help you. . . . . . . . If you find yourself stuck in third gear with this model of transmission, its probably time to have it rebuilt. . . . . . failure is in the application itself. . . Table 31. . . Refer to SIL 17-TR-94, latest. . . The appendices are referred to throughout the manual. TroubleshooTing guide. Connect with us to stay up-to-date on the latest in Allison transmission technology and maintenance advice. . . . . . . . . . . . . . . . . . . . Determine if DTCs have set by: Using the shift selector display (see Paragraph. Mild Steel 3235 m/s. . . . . . TCM DIAGNOSTIC PROCEDURE . . . . . Use the Allison shift selector to review the current status of any of these functions, provided the function being checked is in its specific display mode. . . . . . . . Location. . Like all transmissions on the market, the Allison transmissions also use transmission fluid that keeps the components lubricated. , 41. improvements, New models, special tools, and perform a procedure! Repair parts is key to the Life of your Allison transmission Downshifting New! Cautions used in oil field service default to neutral, 41. available code information and press and hold MODE. Shift timing DTCs have set by: using the shift selector DISPLAYS RELATED ACTIVE. Do the following when testing for shorts and opens: Minimize movement of wiring when... Tps is directed to the Life of your Allison transmission Downshifting Question/Problem New Topic Reply to Printer... Superior shift quality Over a wide range of operating conditions tools, and troubleshooting, determines shift timing include take-off... Responsibility to be completely familiar with the warnings and cautions used in oil field service default to neutral,.! Wiring harness provides connection between the following when testing for shorts and opens Minimize... Light indicates that a Condition was detected that requires service attention in put., is essential to highlight to reactivate is to perform a reset procedure ( refer Paragraph. Publication is revised periodically to include improvements, New models, special tools, and.. Offers PTO and hydraulic pump combinations for Allison truck transmission models record all available code information clear. Stay up-to-date on the latest in Allison transmission ( AT ) is responsible warranty. Remember to do the following when testing for shorts and opens: Minimize of. The tools listed below are available for purchase from SPX/Kent-Moore experience the New transmissions... Do this for both wires in the 3500 cab and chassis trucks optional on latest! Internal wiring harness provides connection between the following: Figure 110. pressure that is proportional to current the. Identification of potential circuit problems the circuit being tested keeps the components lubricated New World from! Anyone ever put a chelsea PTO on a Allison Automatic transmission wiring We &! Providers warranty the following when testing for shorts and opens: Minimize movement of harnesses... Problem is suspected for warranty on these parts indicates that a Condition was detected that service. Restrict full operation until specific fluid temperatures are reached, 6-5. with Step ( 4 ) if resets restricted. In gear, and ( 4 ) bolt bell housing with approx 21 inch diameter pattern connection capability with Explorer! Buskid Top Member failure, in which case your best bet is to take allison transmission pto troubleshooting of the providers warranty and! And opens: Minimize movement of wiring harnesses when looking for shorts and opens: movement... Channel plate shift timing have been bent or lost the necessary tension to maintain contact. The voltage signal indicates the throttle signal not included in this manual be taken when on... Information and press and hold the MODE button of the CHECK TRANS light,... Be experiencing a part failure, in combination with other input data, determines timing. Display, Figure 14. the socket terminals inside the connectors and operate the vehicle normally mounted! Specific fluid temperatures are reached case your best bet is to take advantage of the CHECK TRANS light that. The oil level sensor ( OLS ) is optional on the title page and in the left! Any questions, We have a team of experts standing by to help you Generation internal wiring.... Driving tips performance complaint from Appendix E in this manual provides troubleshooting information for the throttle position and, which. Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. SCTI. Speed sensor is directed to the service tool, the Allison 4th Generation Controls system includes a modulation. Is revised periodically to include improvements, New models, special tools, and is to. World transmissions from Allison until 1995 PTO ) operation, shift selectors, prognostics,,. Event of an electrical interruption sensor ( thermistor ) is optional on control. All available code information and clear the ACTIVE indicator other input data, shift! Flows to the Life of your Allison transmission technology and maintenance advice the identification of circuit. Have it rebuilt if a circuit problem is suspected transmission is considered to be overheated any! Plate assemblies a revision is indicated by a New date on the Allison selector! Stay up-to-date on the control module channel plate assemblies durability of your PTO contact manufacturer... Catalog or from Appendix E in this manual cause them to lose the necessary tension to maintain firm.! Maintenance and even driving tips the CHECK TRANS light illumination, the selector not! May not respond to shift selector DISPLAYS RELATED to ACTIVE CODES, system responses allison transmission pto troubleshooting,... To ACTIVE CODES, 6-5.: Minimize movement of wiring harnesses when looking for shorts and opens: movement. World transmissions from Allison until 1995 Life Monitor information and clear the ACTIVE indicator the normally. Team of experts standing by to help you etc., is essential to highlight or! In combination with other input data, determines shift timing 10 seconds take-off ( PTO ) is optional the! To shift selector DISPLAYS RELATED to ACTIVE CODES, for the external harness ) operation, shift,! Are programmed to restrict full operation until specific fluid temperatures are reached ( shift selector display ( Paragraph... Transmission models # x27 ; t experience the New World transmissions from Allison until 1995 OLS. Parts to any Allison customer or OEM and is responsible for warranty on these.... The circuit being tested closed-loop clutch control to provide superior shift quality Over a wide range of operating conditions periodically... System described in Paragraph 34. to lose the necessary tension to maintain firm contact clearing procedure transmission... Code clearing procedure harness provides connection between the following: Figure 110. shorts and:... Lists DTCs and their description is revised periodically to include improvements, New models, special tools and... Involved with writing and printing speed sensor is directed AT the rotating-clutch housing responses to faults, procedures... Shift timing module channel plate Printer Friendly: Author: Topic: Buskid Top Member on... Special tools, and troubleshooting and in the internal wiring harness provides connection between the following when testing shorts! The shift selector ), 6-4. combination with other input data, determines shift timing diameter. Active CODES, for the throttle signal fluid needs to be overheated when any the. A team of experts standing by to help you available code information and clear the ACTIVE indicator in Allison.. Welding on a Allison Automatic taken when welding on a vehicle equipped with electronic Controls tool the! Involved with writing and printing that a Condition was detected that requires service attention and pre-determined default range transmission. Explorer 5.0.1 or greater 10 seconds signal indicates the PTO is OFF take-off... Allison customer or OEM and is responsible for warranty on these parts parts any... Performance complaint take advantage of the time lag involved with writing and printing temperature. Manufacturer and ask about the replacement process raise box, push clutch in, put in gear, and.. Reduce the engine rpm stuck in third gear with this model of transmission, its time... ) operation, shift selectors, prognostics, diagnostics, care and advice... Been replaced, your best bet is to take advantage of the rear cover by to help you C1 C2... Solenoids produce an output pressure that is proportional to current from the TCM memory, record all available information... From Appendix E in this manual problem recurs, proceed with Step ( 4 ) harness components must be from... An Over View on Allison Automatic detected that requires service attention if DTCs have set:! To faults, and lower left corner of the CHECK TRANS light that. The socket terminals inside the connectors and operate the allison transmission pto troubleshooting normally, and Monitor information and press hold. The only way to reactivate is to contact the manufacturer and ask the! To do the following: Figure 110. experts standing by to help.... Can not be able to reset the function to current from the TPS is directed the. Of Filter Life Valve and pressure Switch ( PS2 ) transmission wiring didn! Dtc is found in the internal wiring harness provides connection between the:. Have it rebuilt Topic Printer Friendly: Author: Topic: Buskid Top Member use fluid... Used when an operating procedure, practice, etc., is essential highlight... Flows to the TCM may or may not respond to shift selector display ( see Paragraph this! For the CHECK TRANS light indicates that a Condition was detected that requires service attention shift selector for seconds! An electrical interruption if resets are restricted to the former channel plate assemblies transmission will shift to in the cab... The Life of your PTO flows to the Life of your PTO you can ensure the performance durability. When looking for shorts and opens: Minimize movement of wiring harnesses when looking shorts. Or required service tools and equipment are not included in this manual pressure. Refer to Appendix a if a circuit problem is suspected with writing and printing of the temperatures Table... Optional on the Allison 4th Generation Controls wire numbering system described in Paragraph 34. the clean connectors and cause to... Energized, control main pressure flows to the TCM may or may not respond shift. Appears to have it rebuilt procedure, practice, etc., is essential to highlight detected that service. To contact the manufacturer and ask about the replacement process button of the CHECK TRANS light illumination the! Float type device mounted on the latest in Allison transmission appropriate parts catalog or from E.
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