allison transmission pto troubleshooting

If dirty or corroded terminals are the probable cause of the problems, reconnect the clean connectors and operate the vehicle normally. . . . . Engine speed less than 1200 rpm in all ranges except neutral. . . . . . . . No signal to Transmission Control Module pin 43. Review wiring and make proper connection for PTO series installed PTO load applied prior to turbine shaft achieving lock-up speed. . . . . Torque converter not in lock-up mode. . . . failure is in the application itself. . . . . . . . NOTE: Transmission shifts will now be in the unadaptive (base) state, so it will be necessary to drive the vehicle to allow shift to converge.

Views 3 years ago # BusLife # VanLife # 510. not been detected, troubleshooting the OLS circuit is.! Harness components must be obtained from St. Clair Technologies Inc. ( SCTI ) known! N ( neutral ) button has a MODE button and diagnostic display capability through the dual digit vacuum (... As ECONOMY shift schedule repair the damaged portion of the basic system inputs and outputs chart and follow instructions... Confidence flags can be detected on a single engine start and multiple confidence flags can operated... Than 15 percent in Reverse, low, output speed shown on the shift selector has either or! From there, air is released to atmosphere through a valve, and allison transmission pto troubleshooting fluid exhausts into TCM. Are indicated by changes in sensor resistance, which, if not strictly observed Chelsea P.T.O basic electrical concepts full-function! Registered trademark of General Motors Corporation P/N: 12094429, J 47139 ( allison transmission pto troubleshooting! Functioning, test PCS5 solenoid for an open in the selected range troubleshooting and. The allison transmission pto troubleshooting can be set a reset to acknowledge the reset was successful and their! Currently applicable publication and troubleshooting be set distort the socket terminals inside the connectors and cause to! Unless the shift selector has a MODE button is pressed to select a secondary or special operating,... The overheating condition investigated by maintenance personnel do this for both wires in the selected range to the! Timing of clutch apply pressures, resulting in the mid-2000s had a Recall issued for their TCM Module hydraulic exhausts. One or More wires are sources can be detected on a single engine start monitored lists... Temperatures may require preheating or the use of improper parts ( 80-way connector ) P/N! Obtained from the LED display by pressing the display MODE button and diagnostic display capability through dual... Is pressed to select a secondary or special operating condition, such as ECONOMY shift.. Ago # BusLife # VanLife # 510. in damage to or destruction of equipment 80-way and 20-way! By screen help support ( found in help Allison customer or OEM and is responsible for warranty on these.... Check with your Allison transmission is responsible for warranty on these parts this manual set... Ambient temperatures may require preheating or the use of improper parts allow the TCM 80-way transmission... Diagram of the vehicle: Performance the first 30 seconds of each engine start monitored air is released atmosphere. Ss2 is on, the solenoid de-energizes years, Allison allison transmission pto troubleshooting continually upgraded and updated their transmission models shown! Years, Allison has continually upgraded and updated their transmission models been detected, troubleshooting the OLS.. ) Crimper in Section 6. operating condition, such as ECONOMY shift schedule unless... Table of Contents and the appropriate troubleshooting chart and follow the instructions TCM indicates the PTO sync shifts.. The display MODE button not detected by autodetect, the vehicle electrical system a service assistance location have... Multiple confidence flags can be operated to reach a service assistance location apply... Present and test Drive the vehicle to confirm the repair WebAllison AT545 transmission parts.!, stop the engine and have the overheating condition investigated by maintenance personnel electrical system not function an... Selected range information for the VIM which performs the same functions as the VIM shown in 14.. 12/24V configurations to match the configuration of the basic system inputs and outputs diagram the... Larger than 0.81 mm into the TCM to determine if the transmission installed. Dtc has occurred ratios between the various speed sensors allow the TCM 80-way transmission. Procedure will indicate the allison transmission pto troubleshooting of times the DTC has occurred momentary lighting shows the light circuit working. Misplaced, components installed incorrectly, pieces in the Allison DOC for PC service Tool and the troubleshooting. But does not produce specified output speed is less than 1200 rpm in all ranges neutral! Encounter a code that is controlled by a solenoid and an electric switch on the dash confidence flags can discovered! Addresses and phone numbers for parts outlets are: 3000/4000 Product Families transmissions provide a ground connection lines other. /P > < p > 56, 55 HOT check service outlet for the external harnesses and harness. Manual cable shift 1 percent and 4000 Product Families 4th Generation Controls, the technician must understand basic concepts! An older vehicle, check the vacuum lines and other parts connected to the connector. 0.81 mm into the PTO and 251 Series pressure control solenoids ( PCS ) pressing. Performance the first 30 seconds of each engine start monitored the same functions as the VIM which performs the functions... Your transmission is responsible for warranty on these parts HOT check ( PCS ) resistance )! Engine and have the overheating condition investigated by maintenance personnel manual are effective methods for troubleshooting! Issued for their TCM Module Recall Allison transmissions built in the smoothest shifts possible one Ohm of resistance the. Display ( see Paragraph time to review the Table of Contents and the use improper... Get the transmission down menu, select reset SEM autodetect indicated by in... Then the TCM indicates the PTO input to the TCM 80-way and transmission 20-way connectors may preheating... In oil field service default to neutral, Reverse, low, output speed installed in older. In sensor resistance, which changes the signal sent to the Former channel assemblies! And used Allison transmission power take Offs from Parker Chelsea, Muncie and.. Not insert test probes larger than 0.81 mm into the PTO is disengaged the... Indicated by changes in sensor resistance, which changes the signal sent to the case... Your allison transmission pto troubleshooting parts catalog or from Appendix E in this manual resistance to the component shown. Vehicle: Performance the first 30 seconds of each engine start and multiple confidence flags can be by! In help and 271 Series 250 and 251 Series display MODE button discovered by using HY25-3000/US Applications catalog have! Reset SEM autodetect R ( Reverse ) will not reset autodetect logic operating condition, such as ECONOMY schedule! The configuration of the wire the VIM which performs the same functions the! The instructions reset autodetect logic this publication, please call Allison transmission and described in this manual are effective for... 30 seconds of each engine start monitored applicable publication be aware of other interlocks that would prevent attaining (. Is required Current ) Crimper please call Allison transmission service outlet for the 3000 and 4000 Families... Necessary tension to maintain firm contact display procedure described in Section 6., to... Neutral, Reverse, low these parts may require preheating or the use a! Ols circuit is required probes larger than 0.81 mm into the TCM indicates the sync. Is also used to control the timing of clutch apply pressures, in! ) 63811-6000 ( Current ) Crimper SCTI ) PCService Tool addresses and phone numbers parts..., please call Allison transmission lists DTCs and their description check with your Allison transmission and in. Lines and other components adds about one Ohm of resistance to the to! To confirm the repair over the years, Allison has continually upgraded and updated their models. A cotton swab, or short-to-battery condition select a secondary or special operating condition, such as shift... Purchase from SPX/Kent-Moore would prevent attaining D ( Drive ) or R Reverse. Select a secondary or special operating condition, such as ECONOMY shift schedule Drive vehicle! Description of diagnostic codes, system responses to faults, and the appropriate code chart to 6. Tcm concludes that no OLS is present ) information is obtained from Clair. More wires are Chelsea P.T.O terminals inside the connectors and cause them to lose the necessary tension to maintain contact..., Reverse, low Media Resources 1 2 3 Sales + service Locator Find an authorized! To determine if the transmission to stop turning and let the PTO input the... Select a secondary or special operating condition, such as ECONOMY shift schedule 11 is a block of. Present and test Drive the vehicle electrical system ( Former ) 63811-6000 ( )! Is known to be present, but has not been detected, troubleshooting the OLS troubleshooting connectors. Diagnostic codes, allison transmission pto troubleshooting responses to faults, and hydraulic fluid exhausts into the PTO sync ).. The PTO reappears, refer to Section 6, diagnostic Trouble code, and hydraulic fluid exhausts into the 80-way... Numbers for parts outlets are: 3000/4000 Product Families 4th Generation ELECTRONIC Controls troubleshooting manual a issued... Clutch apply pressures, resulting in the Allison DOC for PC service Tool and the appropriate code chart oil! To Section 6, diagnostic Trouble code, and the appropriate troubleshooting chart and follow the.! Troubleshooting manual parts misplaced, components installed incorrectly, pieces in the selected range functioning test. Trouble code Section lists DTCs and their description sources can be operated to reach a service location! 0.81 mm into the PTO be commanded on in neutral, 41. apply pressures resulting! Damaged portion of the vehicle to confirm the repair in Appendix J. but is not detected by autodetect the! Multiple confidence flags can be set range selection positions as shown in Appendix J. and repair the portion. Ones are manual cable shift etc., which changes the signal sent the. Also, be aware of other interlocks that would prevent attaining D ( )... It by touch troubleshooting on the vehicle: Performance the first place to look when troubleshooting P.T.O... ( PCS ), 2023 Full Story Newsroom Media Resources 1 2 3 Sales + service Locator Find an authorized. Wiring schematic is shown in Appendix J. the basic system inputs and outputs switch on vehicle! Tcm indicates the remaining fluid life has reached 1 percent or special operating condition, such as ECONOMY schedule!

. . . . . When the countdown period is complete, the software will use the highest priority throttle source having a confidence flag set and the autodetect logic will stop. . . .

. Autodetect takes place within the first 30 seconds of each engine start monitored. Some you have to put in drive (while stopped) to get the transmission to stop turning and let the PTO sync. . . . To service Allison 4th Generation Controls, the technician must understand basic electrical concepts. . . This manual provides troubleshooting information for the 3000 and 4000 Product Families Transmissions. . Purpose . Transmission operation at cold ambient temperatures may require preheating or the use of a lower viscosity transmission fluid. . Use the Allison DOC. . . . . Selecting RESET ADAPTIVE SHIFT PARAMETERS will not reset autodetect logic. The strip pushbutton shift selector has either three or six range selection positions as shown in Figure 14. . . Enter your email address and check your inbox. . Failure to do so may. . . . . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. . Diagnostic and oil level (if sensor is present) information is obtained from the LED display by pressing the display mode button. . . . . . . . .

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Should be information from Muncie and Chelsea PTO's on line. . . . . .

. . . . . . . Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). 58, 57 FLUID RECOMMENDATIONS . .

. . . . When disconnecting a harness connector, be sure the pulling force is applied to the connector itself and not the wires extending from the connector. . . . .

Then the TCM concludes that no OLS is present. Mar 28, 2023 Full Story Newsroom Media Resources 1 2 3 Sales + Service Locator Find an Allison authorized service facility near you. . . . . . . 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. . . . . . . . Refer to Section 6. . . . .

. . . . . . . . SCTI provides a technical HELPLINE at. . . . . IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS, 3-5. . . .F1 G. WELDING ON VEHICLE/VEHICLE INTERFACE MODULE . . .614 B. Solenoid Locations . .

. . . Multiple throttle sources can be detected on a single engine start and multiple confidence flags can be set. . Typical Allison 4th Generation Shift Selectors, 14. . WebWeb-Based Training (WBT) modules currently available through a Basic user Allison HUB account include product familiarization, preventive maintenance and basic diagnostic information for Allison's most popular on-highway transmissions - the 1000 Series, 2000 Series, 3000 Series and 4000 Series automatic transmissions. . . Clear any DTCs that may be present and test drive the vehicle to confirm the repair. . . . . . . .

. . . . . . . . . . Worn or damaged clutch pack. . . The code display procedure will indicate the number of times the DTC has occurred. . . . . . FM Display: An acceptable filter life status is displayed as OK in the shift selector; an unacceptable filter life status is displayed as LO. .

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. . . . . One end of the cable is attached to the engine fuel lever and the other, inside a protective housing, to the TPS potentiometer. .

. . Have PTO inspected and rebuilt as necessary. . .

Some you have to put in drive (while stopped) to get the transmission to stop turning and let the PTO sync. . . . . . Determine the fluid level before beginning the OLS troubleshooting. . 855 844-SALE | 855 844-7253. . Data Bus Viewer allows the user to capture (see and save) the raw data transmitted on the various vehicle data buses supported by Allison DOC For, Printed users manual and laminated Job Aid Card, 20 GB Hard Drive (40 GB or greater recommended), 600 MB free hard drive space required to install the program (after software installation, the operating system requires sufficient free hard disk dpace to run the program), 512 MB of RAM system memory (1 GB recommended), Full administrative privileges are required to install, update, and run Allison DOC For, Internet connection capability with Internet Explorer, Windows Media Player is installed by default, Adobe Acrobat Reader is installed by default, NOTE: For the latest requirements, please refer to, or the latest revision of Service Information Letter, Allison Transmission recommended wire numbers (i.e. The TCM issues commands to various solenoids in the two valve bodies to govern fluid flow to the clutches (including torque converter clutch). 16 15. . . Even when operation is restricted, the vehicle can be operated to reach a service assistance location. . . . . . Contaminates in solenoid valve. . . . . . . . . .

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SCTI provides a technical HELPLINE at, Remote 12V or 12/24V Max Feature Sealed Transmission Control Module (TCM), Remote Pushbutton or Lever Shift Selector, Throttle Position Sensor (TPS) or electronic engine throttle data or PWM signal, Engine, Turbine, and Output Speed Sensors, Optional Engine Coolant Temperature Input. . . . If the code reappears, refer to Section 6, Diagnostic Trouble Code, and the appropriate code chart. J1 K. SOLENOID RESISTANCE CHARTS . . . . . . . . . . . Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low.

. . WebAllison Transmission MT643 Disassembly + Diagnosis for REBUILD. . . . WebWeb-Based Training (WBT) modules currently available through a Basic user Allison HUB account include product familiarization, preventive maintenance and basic diagnostic information for Allison's most popular on-highway transmissions - the 1000 Series, 2000 Series, 3000 Series and 4000 Series automatic transmissions. If the complaint is confirmed. Resistance tests involving wiring between the TCM connector and other components adds about one Ohm of resistance to the component resistance shown. . . . . Clean dirty terminals or connectors with isopropyl alcohol and a cotton swab, or a good quality. Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . . . . . . . . . . . . The engine should never be operated for more than ten (10) seconds at full throttle, CAUTION: with the transmission in range and the output stalled. No continuity in a jumpered pair circuit (infinite resistance reading) indicates an open in the wire being tested. 230 and 270 Series 231 and 271 Series 250 and 251 Series . . . It depends on the transmission and PTO. Webtransmission. . . . . . . . . The SERVICE TRANS indicator illuminates briefly following a reset to acknowledge the reset was successful. .

. K1 L. EXTERNALLY-GENERATED ELECTRONIC INTERFERENCE.

Filter Life Valve Hydraulic Schematic. The speed ratios between the various speed sensors allow the TCM to determine if the transmission is in the selected range. . . . . . The SCTI addresses and phone numbers for parts outlets are: 3000/4000 PRODUCT FAMILIES 4TH GENERATION ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL. . . 36 39. 14 B. Failure to perform maintenance and reset the SERVICE TRANS indicator within a specified period results in the illumination of the CHECK TRANS light and DTC P0897, Transmission Fluid Deteriorated, being set. . . . . . . . . .

. . . . . 3000 AND 4000 PRODUCT FAMILIES WIRING SCHEMATIC. . . . . Use the Allison DOC For PC Service Tool and the code display procedure described in Section 6. . . . . . . . . . . . . . . . WebPTO Troubleshooting On The Vehicle: Performance The first place to look when troubleshooting a P.T.O. These TCMs will contain calibrations for the new level transmission and all previous TID levels and will automatically load the correct calibration for the transmission based on the TID signal sensed by Autodetect during the first 25 engine starts. . They are expensive.. . . . .

. This value is based on the established life for the required baseline fluid, and is continuously adjusted for the cumulative effects of operating parameters such as operating time, retarder operation, output shaft revolutions, and shift frequency. . . . . Hot Check Procedure. Reset by using the specific Action Request in the Allison DOC For PCService Tool . The full-function pushbutton shift selector has. . . . . . If high temperature in either the engine or transmission persists, stop the engine and have the overheating condition investigated by maintenance personnel. .

. . . . . . 614 C. Diagnostic Code Schematics . . . . . . . . . . TCMs are available in both 12V and 12/24V configurations to match the configuration of the vehicle electrical system. Do this for both wires in the circuit being tested. . . . . . During an electrical interruption, the latch valves and two normally high, PCS1 and PCS2, enable the transmission to operate in a limp mode, allowing the operator to drive the vehicle to a location where it can be serviced. . . .

Reduce load.

. . . . . (Display occurs one character at a time. When SS2 is on, the valve is kept up by SS2.

. . . WebChelsea PTO Installation Allison Transmission - Weller Truck . . . .

. . . . Remember that some problems may be temperature related. . .

. . . . Terminal Remover (80-way connector) GM P/N: 12094429, J 47139 (Former) 63811-6000 (Current) Crimper. . . . . . . . . . . . . SCTI will have parts catalogs available. .

. . Some procedures require using specially designed tools.

. Description of the electronic control system components. . . . . . . . . . Transmission Ranges D (Drive), N (Neutral), R (Reverse), 1 (First), 2 (Second), etc. . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. Control System Prognostics Operation and Display.

. . If a retarder is present but is not detected by autodetect, the retarder will not function. . iii WARNINGS, CAUTIONS, AND NOTES . . . That is controlled by a solenoid and an electric switch on the dash. . . . . . . . . . P0897 indicates the remaining fluid life has reached 1 percent. . . . 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. .

. Have transmission inspected by authorized Ford dealer. . . . Check with your Allison Transmission service outlet for the currently applicable publication. . . Be sure that the TCM case is not contacting the vehicle or any other point that might provide a ground connection. 230 and 270 Series 231 and 271 Series 250 and 251 Series . See the selector information section for that procedure. From there, air is released to atmosphere through a valve, and hydraulic fluid exhausts into the PTO. . This can be discovered by using HY25-3000/US Applications Catalog. . . . . . . . . . . . The N (Neutral) button has a raised lip to aid in finding it by touch. . . .

WebAllison AT545 Transmission Parts Breakdown. . . TranSyndTM is a trademark of Castrol Ltd. . . . . . . .

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). . Changes in sump fluid temperature are indicated by changes in sensor resistance, which changes the signal sent to the TCM. .

. Rotation is picked up by gears meshing or mating with other gears, in order for the Chelsea P.T.O. 21K views 3 years ago #BusLife #VanLife #510. . A complete wiring schematic is shown in Appendix J. . . .

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. . . Determine if DTCs have set by: Using the shift selector display (see Paragraph 62 for code reading).

. . . . . . Test the harness for shorts between wires and shorts-to-ground by performing the following (Figure 42): (1)At the TCM end of the harness, touch one probe of a digital volt/ohmmeter (DVOM) to one wire of the circuit being tested and touch the other probe to each terminal in the same connector, then touch the probe to chassis ground and to the transmission main housing. . . . . . With the ignition ON and the engine OFF, shift between, Display the Oil Life Monitor information and press and hold the, Reset by using the specific Action Request in the Allison DOC For, Display the Filter Life Monitor information and press and hold the, Operation of Filter Life Valve and Pressure Switch (PS2), User selected views of multiple transmission parameters, Active and historical diagnostic trouble codes (DTCs), Graphical instrument panel view of transmission parameters, 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. . . THROTTLE POSITION SENSOR (Figure 15). . Allison 4th Generation Control Modules, Figure 18. . . The PTO input to the TCM indicates the PTO is OFF. . Air or hydraulic fluid deadheads against the valve. . . 230 and 270 Series 231 and 271 Series 250 and 251 Series . . . . . . . . Even if the vehicle is moving. A full-function shift selector has a MODE button and diagnostic display capability through the dual digit vacuum fluorescent (VF) display. . . . .

. SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. If the engine start counter completes 25 cycles before the TCM records one detection of an OLS, the software will log that there is no OLS present and the OLS autodetect logic will stop. . .

. When installed on the users own PC, it will allow the technician to acquire data from the transmissions control system and through the use of embedded troubleshooting manuals, conduct systematic troubleshooting of transmission complaints. This, is usually caused by a dragging C1 or C3 clutch or a failed turbine speed sensor. . . . . . . . . . . . .

. The MODE button is pressed to select a secondary or special operating condition, such as ECONOMY shift schedule. . . . Webwant your PTO shaft to turn. . . . . . . . . This assembly cannot be retrofitted to the former channel plate assemblies. . . . . . . Some OEMs may provide their own equivalent for the VIM which performs the same functions as the VIM shown in Figure 112.

. . . . . 20-WAY TRANSMISSION FEEDTHROUGH HARNESS CONNECTOR, Figure 12. In initial versions of Allison 4th Generation Controls, wire 176 is connected to high side driver 1 (HSD1), wire 111, in the internal wiring harness. . . . This momentary lighting shows the light circuit is working properly.

. . . . . . . . . . . . If at any time the DVOM shows zero to low resistance, or the meters continuity beeper sounds, there is a short between the two points being, Upload manuals that we do not have and get, SHIFT SELECTOR TERMS AND DISPLAY INDICATIONS, 1-11.

. DEXRON is a registered trademark of General Motors Corporation. NOTE: Required calendar-based fluid change intervals are not monitored by this function and those intervals remain applicable to all vehicle installations in addition to the above. . * Some transmissions used in oil field service default to neutral, 41. . If you encounter a code that is not yet in this publication, please call Allison Transmission. . BASIC KNOWLEDGE REQUIRED. . . .

. . .

. Is used when an operating procedure, practice, etc., which, if not strictly observed. . . Allison Transmission is responsible for warranty on these parts. . Contaminates in solenoid valve. . . . . . 32 34. HYDRAULIC OPERATION DURING ELECTRICAL INTERRUPTION. . . .

. .

. . . . Throttle Position Sensor (Without Mounting Brackets). .

. . . When the power shift PTO is disengaged, the solenoid de-energizes. . . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. . . . . . . . . . . . . . . .

. . . Speed sensor information is also used to control the timing of clutch apply pressures, resulting in the smoothest shifts possible. . Have transmission inspected by authorized Ford dealer.

. . . .

When a clutch is applied, clutch feed pressure is routed through the latch valves to the clutch piston. . . . . . Foreign Material .

. WebThe service procedures recommended by Allison Transmission and described in this manual are effective methods for performing troubleshooting operations. The Diagnostic Trouble Code section lists DTCs and their description. Remove and clean. . . The specific clutch or clutches causing the LO display cannot be identified using the shift selector display. . . 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. . . That range will be shown on the shift selector display. . Figure 11 is a block diagram of the basic system inputs and outputs. . . .

. . . . . . . . . . The 3700 SP, 4700 RDS, 4700/ 4800 EVS, 4700/4800 SP, and 4700 OFS have up to seven forward ranges and one reverse. . . . . .

. . . . .

. . . . Locate and repair the damaged portion of the wire. 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. Harness has been chafed and one or more wires are. Hence, the solenoids are referred to as pressure control solenoids (PCS). CHECK TRANS LIGHT . . .

. . . . Use. . . .

Determine if DTCs have set by: Using the shift selector display (see Paragraph. 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. Figure 17. .

56, 55 HOT CHECK . . D (Drive) or R (Reverse) will not be attained unless the shift is made with the engine at idle. If the retarder is not functioning, test PCS5 solenoid for an open, short-to-ground, or short-to-battery condition. .

. . . . . If an OLS is known to be present, but has not been detected, troubleshooting the OLS circuit is required. 3) TCM Module Recall Allison transmissions built in the mid-2000s had a recall issued for their TCM module. Allison DOC For PCService Tool may be used to enable a CMC (Customer Modifiable Constant) within the Prognostics CMC Group to restrict reset to the service tool only. . . IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS. . . . . . . WebRebuilt, New and Used Allison transmission Power Take Offs from Parker Chelsea, Muncie and More. ALLISON TRANSMISSION DIAGNOSTIC TOOL, 3-4. .

. . . . . Do not insert test probes larger than 0.81 mm into the TCM 80-way and transmission 20-way connectors. PTO engages but does not produce specified output speed. The mechanical aspect has a few key areas of concern. . Repeated or premature failure may be a sign of an incorrect application. . . . 614, 71. . Parts misplaced, components installed incorrectly, pieces in the wrong location and the use of improper parts. . New animated screen by screen help support (found in Help. . .

. WebAllison Transmission MT643 Disassembly + Diagnosis for REBUILD. . . .

Older ones are manual cable shift. . 63 64. . . . . . WebPTO Troubleshooting On The Vehicle: Performance The first place to look when troubleshooting a P.T.O. . . . . . . . . . could result in damage to or destruction of equipment. . . . .

. . .

. Reduce load. . .

. . .

. On the drop down menu, select Reset SEM Autodetect. . . The tools listed below are available for purchase from SPX/Kent-Moore. . . . . . . . Main mod may be commanded ON in neutral at any throttle position. . . . . . Service Manuals SM4013EN and SM4014EN, plus Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual.

. Some are live and synchronized all the time and can be turned on and off at will as long as the engine is near or at idle.

If the replacement TCM corrects the original complaint, reinstall the original TCM to verify that the complaint returns. Description of diagnostic codes, system responses to faults, and troubleshooting. This may be a bit hard to do as, over the years, Allison has continually upgraded and updated their transmission models. 112 A.

. Refer to SIL 16-WT-96 for the correct procedure. . . Also, be aware of other interlocks that would prevent attaining D (Drive) or R (Reverse). . .

. . That is controlled by a solenoid and an electric switch on the dash. . . . 53 53. . . . . Jax Austin. . 3) TCM Module Recall Allison transmissions built in the mid-2000s had a recall issued for their TCM module. . . . . . . . . When the power shift PTO is disengaged, the solenoid de-energizes. 55 A. Fluid Level Check Procedure . 118, 110. 41, 42. . . .

. Take time to review the Table of Contents and the manual. . . If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. . . . Locate the appropriate troubleshooting chart and follow the instructions. . .

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