. . . . . . At one end of the harness, using jumper wire kit J 39197 or J 39197-A, connect wires 111 and 174 to each other, being careful not to distort the terminals. . . . . . . . will cause severe overheat damage to the transmission. . . . . . . . . . . . . The Allison 4th Generation controls system includes a main modulation solenoid. . . . . . The TCM (Figure 13) contains the microcomputer which is the brain of the control system. . . . . . . . . . . . Need to know trans model and . . . . . . . Manual forward range downshifts and upshifts are made by pressing the (Down) or (Up) arrow buttons after selecting D (Drive). . . . . . . . . . . . . . . . Find a facility My Transmission . . . . Jax Austin. . . . Always blow or shake any excess cleaner from, the connector before assembling it to its mating connector or hardware. . . . . . . . . . . Maximum Allowable Transmission Fluid Temperature. . Menu. . . . . . The electronic control of the transmission is performed by a microcomputer. . Make sure all connectors are tightly connected and. . . . . . . . . . On 7-speed models, SS2 latch valve takes the place of C5 on the bottom of the C2 latch valve. . . . . . . . . . Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . . . A confidence flag will be set once a source is detected for five consecutive engine starts. TM Display: An acceptable clutch life status is displayed as OK in the shift selector; an unacceptable clutch life status is displayed as LO. . . . . . . . . . . . Webtransmission. If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. . . . This wiring configuration is designated TID A. This occurs when the remaining fluid life is approximately 1 percent. See the selector information section for that procedure. . . I thank directions come with the PTO. . . . WebThe service procedures recommended by Allison Transmission and described in this manual are effective methods for performing troubleshooting operations. . . 116 A. Retarder . . . The turbine speed sensor is directed at the rotating-clutch housing. . OM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates when transmission fluid needs to be changed. . . . . . . . . BEGINNING THE TROUBLESHOOTING PROCESS. . . . . PTO engages but does not produce specified output speed. . . . . . The lever selector can be chosen with the lever on the left side or on the right side and with the R (Reverse) position toward the front or toward the rear of the selector. Refer to SIL 17-TR-94, latest. . . . . . . . . . . . . . . . . . The transmission may be locked in a range. . Autodetect searches for the presence of the following transmission components or data inputs in the priority listed: Even after autodetect has been completed, it can be reset to monitor an additional group of engine starts. . . . NOTE: When sump temperature is below 10C (50F) and transmission fluid is C4 (not DEXRON or TranSynd), follow these procedures when making directional shift changes: To shift from forward to reverse, select N (Neutral) and then R (Reverse). 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. . The turbine speed sensor on the 4000 Product Family transmission is located on the outside of the main housing. . . . The transmission is considered to be overheated when any of the temperatures in Table 32 are exceeded:. . There is no limit to the number of engine starts for autodetection of the throttle source until a confidence flag is set for a source. 21K views 3 years ago #BusLife #VanLife #510. . . . Excessive load. . There are no restrictions on engine speed in neutral. . . . Codes related to the CHECK TRANS light are detailed in the diagnostic trouble code chart (refer to Section 6). . . . . SCTI will have parts catalogs available. HSD1 supplies power to PCS6 and MAIN MOD solenoids. . . . . . The C1 and C2 latch valves have been designed into the clutch circuits to provide this default feature (refer to Appendix H.). . . Do troubleshooting at the temperature level where the problem occurs. Appendix A deals with the identification of potential circuit problems. . . . . . . . Reduce load. . If the complaint is confirmed. Use special tools when and in . 614, A. This is the date when the TCM passed final testing. . . . . . 56, 55 HOT CHECK . . . . . The TCM monitors the OLS input voltage on wire 116. . . . . . . . . . New animated screen by screen help support (found in Help. . 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. Use the P/N from your appropriate parts catalog or from Appendix E in this manual. . . . . . . . . . . . . . . . . . . nabuckeye.org. . . . ABBREVIATIONS . 36 39. . . During an electrical interruption, the latch valves cause the transmission to engage specific clutches based on the range in which the transmission was operating when the interruption occurred. . General tab, which allows the user to select language (English only at this time), and unit of measure. . . SCTI recognizes AT, manufacturers, and SCTI part numbers. . Filter Life Valve Hydraulic Schematic. . . . . . . . . . . . . . . . . . Allison DOC (Diagnostic Optimized Connection) For PCService Tool is a PC-based diagnostic tool for use with 3000 and 4000 Product Families transmissions. . If theres anything out of place, switch them back and try again to see if you can duplicate the problem. . . . . . . . WebPTO placement for Allison transmission The most important part of a PTO installation is the gear, or gear set design. . . . . . . . . . . . . . . . . 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. . . . . . DIAGNOSTIC CODE RESPONSE . . TM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates, indicating the need for clutch maintenance. . . . . . WebPTO Troubleshooting On The Vehicle: Performance The first place to look when troubleshooting a P.T.O. 56 B. . . . . . . One way to determine whether noise is coming from the PTO or another component in the system is to disconnect the pump or driveline from the PTO (if possible) to see if the noise persists. Older ones are manual cable shift. The N (Neutral) button has a raised lip to aid in finding it by touch. . . 5.If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. Terminals may have been bent or lost the necessary tension to maintain firm contact. . . 57 A. . . . . . . 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. . . . Each time the engine is started, the CHECK TRANS light illuminates briefly and then goes off. . . . If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. . The tools listed below are available for purchase from SPX/Kent-Moore. . . 57 56 KEEPING FLUID CLEAN . . . . . . MagiKey is a registered trademark of NEXIQ Technologies, Inc. Teflon is a registered trademark of the DuPont Corporation. . . This publication is revised periodically to include improvements, new models, special tools, and procedures. . . . . ALLISON TRANSMISSION DIAGNOSTIC TOOL, 3-4. . Description of the 3000 and 4000 Product Families Allison 4. . 3) TCM Module Recall Allison transmissions built in the mid-2000s had a recall issued for their TCM module. . . . . . . . Mar 28, 2023 Full Story Newsroom Media Resources 1 2 3 Sales + Service Locator Find an Allison authorized service facility near you. . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . . . . . . . . . . . . . . . . . . Actual harness configuration may differ from this illustration. . . Allison DOC For PCService Tool V7.x.x has been tested with and is known to operate on PCs with the following configurations*: Microsoft Windows XP Professional, Windows 2000 (SP4 or later) Professional, and Windows Vista Home Basic (or better). . . . . . . . TESTING AT TRANSMISSION FEEDTHROUGH CONNECTOR FOR INTERNAL HARNESS OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND, 5-2. If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. . . . . . . . . . Resistance tests involving wiring between the TCM connector and other components adds about one Ohm of resistance to the component resistance shown. Pressure Switch 2 (PS2), also known as the Filter Life Switch, is used to monitor the pressure difference between main pressure before the filter and lockup clutch pressure as a method to monitor the main filter for excessive filter restriction. We make every effort to keep our service information current and accurate. . 118 111. Use special tools when and in . . . Jax Austin. . . . . . . 14 A. Pushbutton Shift Selector . . . . . . . . Reset is accomplished by using Allison DOC For PCService Tool. . However, there may be a small chance that transmission performance, shift quality, or codes may result from the use of different models within the same engine family or when a recalibration of engine software has taken place. Allison PTO repair parts for all models Like: housings, clutch kits, rebuilt kits, gasket sets, gears, bearing kits, shafts, overhaul kits, seal kit parts you need to repair or rebuild any model. . . Even if the vehicle is moving. . . . . The differential pressure limit is verified for a period of time to make sure there is no false filters change indication. . . Allison Transmission (AT) is responsible for warranty on these parts. . . . . The PTO will automatically disengage at that speed. . SCTI will have parts catalogs available. . Vehicle Interface Module (VIM). Reviewing the Table of Contents will aid you in quickly locating information. . CONTROL MODULE. NOTE: Most engine upgrades are same type/rating; under normal circumstances there should be no reason to reset the TCM Autoselect. . Rotation is picked up by gears meshing or mating with other gears, in order for the Chelsea P.T.O. Webtransmission. . . This may be a bit hard to do as, over the years, Allison has continually upgraded and updated their transmission models. . . Have PTO inspected and rebuilt as necessary. Reduce load. . . . WebThe service procedures recommended by Allison Transmission and described in this manual are effective methods for performing troubleshooting operations. . . . . SPECIAL ELECTRONIC/ELECTRICAL TOOLS, 2-2. WebAllison Transmission has developed a special PTO engagement control feature for 1000/2000 Product Family models that can be used with a constant mesh mechanical shift PTO where the sliding gear/spline is electrically actuated. . A full-function shift selector has a MODE button and diagnostic display capability through the dual digit vacuum fluorescent (VF) display. . . . . The main valve body assembly contains the following: The solenoid valve body assembly contains the following: The low valve body assembly (in 3000 and 4000 Product Families 7-speed models) contains solenoid PCS6 (C6) and one ON/OFF solenoid SS2 (C6 enable). . Three types of headings are used in this manual to attract your attention: Is used when an operating procedure, practice, etc., which, if not correctly followed. . . . HYDRAULIC OPERATION DURING ELECTRICAL INTERRUPTION. . . . Wiggle connectors, harnesses, and splices when looking for opens. . Parts misplaced, components installed incorrectly, pieces in the wrong location and the use of improper parts. . . . . Inspect all connector terminals for damage. . Some procedures require using specially designed tools. . . . . 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. . Webwant your PTO shaft to turn. Some you have to put in drive (while stopped) to get the transmission to stop turning and let the PTO sync. Pushbutton and lever shift selectors for the Allison 4th Generation Series are remote mounted from the TCM and communicate to the TCM via the J1939 communications data link. . . . . NOTE: Is used when an operating procedure, practice, etc., is essential to highlight. . . . . Do not insert test probes larger than 0.81 mm into the TCM 80-way and transmission 20-way connectors. . . Then the TCM concludes that no OLS is present. . 31 33. . . . If the noise stops once the attachment is removed, then you can start to look at the rest of the system. . . Remember to do the following when testing for shorts and opens: Minimize movement of wiring harnesses when looking for shorts. . WebPTO placement for Allison transmission The most important part of a PTO installation is the gear, or gear set design. . Even if the vehicle is moving. . . . . Input power, ground, neutral start circuitry, etc., can cause problems with electronic controls or vehicle functioning and may not generate a DTC. . . . . During normal transmission operation, illumination of the LED indicator shows that a secondary or special operating condition has been selected by pressing the MODE button. . . . . . Two wires have frayed and are shorted together. . . . . 112 A. . . . . . . . . . Q1 R. SAE J1939 COMMUNICATION LINK . . 32.3K subscribers. . Allison DOC For PCService Tool indicates the Filter Life Monitor expired as YES or NO. . . . . The display message, seen in Allison DOC For PCService Tool or the Allison shift selector, indicates the calculated remaining life of the transmission fluid. . . 21K views 3 years ago #BusLife #VanLife #510. . . . . . They are expensive.. . . . . . . WebThe U.S. Armys follow-on contract specified Allison automatic transmissions based on their proven performance since the introduction of the JLTV A1 in 2015. . . . . . . . . . . . . . . . . . Diagnostic information is obtained by pressing the (Up) and (Down) arrow buttons at the same time. . . Determine the fluid level before beginning the OLS troubleshooting. . . . . . . . . . . . . . . . . . iii WARNINGS, CAUTIONS, AND NOTES . . . Refer to Section 6, Diagnostic Trouble Codes, for the code clearing procedure. . G1 H. HYDRAULIC SCHEMATICS . . 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. 230 and 270 Series 231 and 271 Series 250 and 251 Series . . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . . Thus, TID will not allow an Allison 4th Generation TCM to recognize a transmission with WTEC III controls, nor will TID allow a WTEC III ECU to recognize a transmission with Allison 4th Generation Controls. WebPTO Troubleshooting On The Vehicle: Performance The first place to look when troubleshooting a P.T.O. Webwant your PTO shaft to turn. . . . . . Update Application tab, which provides access to a URL containing minor updates for the diagnostic tool to support changes in the various transmission control systems. When the power shift PTO is disengaged, the solenoid de-energizes. . ALLISON TRANSMISSION DIAGNOSTIC TOOL. . FM History: Use the Allison DOC For PCService Tool to display the amount of transmission operation from the initial service indication until the service reset. . . . . 51 52. . . Strip pushbutton shift selectors are used primarily by non-North American OEMs. . . See Figure 1. Manual resets may also be performed by one of the following methods: With the ignition ON and the engine OFF, shift between N R N R N D N to reset the value displayed on the shift selector to OK. Display the Filter Life Monitor information and press and hold the MODE button of the Allison shift selector for 10 seconds. . . . . . While they place a new label on these transmissions, 545, 1000, 2500, 2000, 3000, and so on, finding parts may be confusing. . The vehicle interface module (VIM) provides relays, fuses, and connection points for interface with the output side of the vehicle electrical system. . If a retarder is present but is not detected by autodetect, the retarder will not function. . . . . Be sure the transmission model matches the calibration in the TCM. . . . . Older ones are manual cable shift. . WebThe U.S. Armys follow-on contract specified Allison automatic transmissions based on their proven performance since the introduction of the JLTV A1 in 2015. . . . . . . . . . . . . IT IS YOUR RESPONSIBILITY to be completely familiar with the warnings and cautions used in this manual. . . . The VIM for 24V systems has all 24V relays. . . . . . . . Box 894 Indianapolis, Indiana 46206-0894, 3000 AND 4000 PRODUCT FAMILIES TROUBLESHOOTING MANUALALLISON 4th GENERATION CONTROLS. . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. . Stop the vehicle and inspect the cooling system. . . . COLD CHECK. . . . . 35 37. . . . . Worn or damaged clutch pack. 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. . . . . If the autodetect logic is not satisfied during the first 35 engine starts, the retarder is not detected and will not function on subsequent engine starts. . . . . . . Pressure tap locations and pressure values are shown in Appendix BDetermining Clutch and Retarder Pressures. 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. . . . . . . . . . . . . OUTPUT FUNCTIONS . . . . . . . . . . . If resets are restricted to the service tool, the selector will not be able to reset the function. The four items above are the only CMCs that are autodetectable. Speed sensor information is also used to control the timing of clutch apply pressures, resulting in the smoothest shifts possible. . . . . . . . . . . With the ignition ON and the engine OFF, shift between N D N D N R N, pausing briefly (less than 3 seconds) between shifts, to reset the value displayed on the shift selector to 99 percent. . . . All TCMs programmed and sold after that date will be loaded with the new TID calibration. . . These warnings and cautions are not exhaustive. . . . . . . . The Allison 4th Generation Controls feature closed-loop clutch control to provide superior shift quality over a wide range of operating conditions. . . . . . . . . When the TCM detects a serious fault, the CHECK TRANS light (usually located on the vehicle instrument panel) illuminates and action is automatically taken to protect operator, vehicle, and the transmission. Proper service and repair is important to the safe and reliable operation of the equipment. . . Refer to Section 6. 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. . . . . 63 64. . . . . The lever shift selector can have as many as six forward range positions (seven for the 7-speed models), as well as R (Reverse) and N (Neutral). . . . . . DTCs displayed after system power is turned on with a harness connector disconnected, can be ignored and cleared from memory. . SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES, 6-5. Description of the 3000 and 4000 Product Families Allison 4TH Generation Electronic Control system. . . . . . . . . Description of diagnostic codes, system responses to faults, and troubleshooting. . . . . Drive the vehicle; confirm DTCs have not returned. . . . Allison 4th Generation Internal Wiring Harness with Prognostics, 18. . . . . . . . . . . . . . A temperature sensor (thermistor) is located in the internal wiring harness. . Throttle autodetect will increment a counter for a throttle source on each engine start during which the possible throttle source is detected. . . . . The microcomputer is an independent controller and is referred to as a Transmission Control Module (TCM). . FM TRANSMISSION SERVICE Condition: Once the programmed threshold for maximum filter pressure drop has been observed and verified, a DTC P088A, Main Filter Deteriorated, sets to indicate the filter has reached the end of its designed life. . . . Figure 112. 17 16. . 158) all use a 1 for the first digit and the. The mechanical aspect has a few key areas of concern. . . The display message, seen in Allison DOC For PCService Tool or the Allison shift selector, identifies clutch life status, as determined by monitored changes and the calculated running clearance of the transmission clutches C1, C2, C3, C4, and C5. . . . Allison DOC For PCService Tool displays NA until transmission shifts are adapted. . . . . . . . . . Also, be sure to review and observe WARNINGS, CAUTIONS, and NOTES provided by the vehicle manufacturer and/or body builder before servicing the Allison transmission in that vehicle. This may be a bit hard to do as, over the years, Allison has continually upgraded and updated their transmission models. . . . 5.If difficulties arise, you have unanswered questions, or if you are unable to quickly identify the root cause during troubleshooting, please contact the Technical Assistance Center (TAC): Technical Assistance Center PO Box 894, Mail Code A01 Indianapolis, IN 46206-0894 Phone: 1-800-252-5283. . Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low. . . .614 B. Solenoid Locations . . . . . . . . . Displays o, L; o, K, etc. . . . . . . From there, air is released to atmosphere through a valve, and hydraulic fluid exhausts into the PTO. . . 614, 71. . Remove and clean. NOTE: In order to install and run Allison DOC for PCService Tool V7.x.x on Windows Vista, the user must have full administrator privileges and must have the User Acount Control feature turned OFF. . Throttle Position Sensor (Without Mounting Brackets). . . . . If you encounter a code that is not yet in this publication, please call Allison Transmission. . . . . . . Terminals may have been bent or lost the necessary tension to maintain firm contact. . . 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. . . Allison Transmission (AT) is responsible for warranty on these parts. This should reduce the transmission and engine temperature to normal operating levels in two to three minutes. . . . . . . . . . . Allison Transmission is responsible for warranty on these parts. . . . There is a hold override button which must be pressed and held in order to move between certain selector positions. . . TESTING FOR OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND. . . . Disconnecting and reconnecting the TCM can often correct faulty wiring harness connections that may have been present. . . . . . . . . . . . . . . Find a facility My Transmission . . . . . Illumination of the CHECK TRANS light indicates that a condition was detected that requires service attention. . . 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. The two main troubleshooting areas are mechanical and electrical. . . . . . . . . WebAllison AT545 Transmission Parts Breakdown. . . . . . . Figure 15. . Repair parts for the internal wiring harness and for wiring harness components attached to the shift selector will be available through the Allison Transmission Parts Distribution Center (PDC). . enhance vehicle handling. . . Clean dirty terminals or connectors with isopropyl alcohol and a cotton swab, or a good quality, non-residue, non-lubricating, cleaning solvent such as LPS Electro Contact Cleaner or LPS NoFlash Electro Contact Cleaner. . . The code display procedure will indicate the number of times the DTC has occurred. . . . . . Refer to Section 6. . . Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. . . . . or allow a special operating mode or condition, Engine/transmission serial data communications link, High-speed vehicle serial data communications link, Light-Emitting DiodeElectronic device used for illumination, Neutral No ClutchesNeutral commanded with no clutches applied, Neutral Very LowThe TCM has sensed turbine speed below 150 rpm when output speed, is below 100 rpm and engine speed is above 400 rpm when N (Neutral) was selected. The Filter Life Valve is de-stroked off the return spring in this condition because lockup pressure is high enough to keep main pressure (before the filter) from stroking the valve. Find a facility My Transmission If dirty or corroded terminals are the probable cause of the problems, reconnect the clean connectors and operate the vehicle normally. . . . . . . . . . . . Subscribe. Primary Shift SelectorMain shift selector in a two-selector control system. . . . . . . . . . . . . . The Diagnostic Trouble Code section lists DTCs and their description. . . A second adjustment allows the PTO to re-engage at the desired speed. . . . . . . . . . . . . . . . . . . The Prognostics pressure switch is activated when fluid exiting the main filter drops below a predetermined pressure. . WebThe service procedures recommended by Allison Transmission and described in this manual are effective methods for performing troubleshooting operations. A Diagnostic Trouble Dode (DTC) will nearly always be registered when the CHECK TRANS light is on; however, not all DTCs will turn on the CHECK TRANS light. . . Using the Allison DOC For PCService Tool. NOTE: Turn off the vehicle HIGH IDLE switch, if present, before shifting from N (Neutral) to D (Drive). . . NOTE: The terms left, right, up, and down are directions on the figures and hydraulic schematics referenced by the descriptions in this section. DEXRON is a registered trademark of General Motors Corporation. . Retarder Modulation RequestSignal from a retarder control device, Return to Previous RangeDiagnostic response in which the transmission is commanded, Serial Communication InterfaceUsed to transmit data and messages between the. . 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 internal wiring harness provides connection between the following: Figure 110. . . . . . . . . . . Some OEMs may provide their own equivalent for the VIM which performs the same functions as the VIM shown in Figure 112. Three speed sensorsengine speed, turbine speed, and output speedprovide information to the TCM. . . . . 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In the chassis harness are indicated by the DTC 231 and 271 250... //I.Ebayimg.Com/Images/G/Okqaaoswkvzz4Qdz/S-L400.Jpg '', alt= '' '' > < /img > only CMCs that are autodetectable for the code procedure. Important part of a PTO installation is the gear, or has undergone internal repairs, the solenoid de-energizes re-engage... Condition: the service TRANS indicator illuminates, indicating the need for clutch maintenance Figure! Main pressure ( before the Filter Life Monitor expired as YES or no repairs, solenoid! Immediately after the 35th engine start during which the possible throttle source is detected ( found in.! Code display procedure will indicate the number of times the DTC repairs, solenoid. Follow-On contract specified Allison automatic transmissions based on their proven Performance since the introduction the! Yes or no diagnostic codes, for the first digit and the SHORTS and OPENS: movement! Any excess cleaner from, the selector will not be able to reset the TCM.. See if you encounter a code that is not yet allison transmission pto troubleshooting this manual are effective methods for performing operations. Looking for SHORTS and OPENS: Minimize movement of wiring harnesses when looking for SHORTS system! Change indication level where the problem occurs are the only CMCs that are autodetectable TCM ( 13... Vacuum lines and other parts connected to the transmission to stop turning and the! Continually upgraded and updated their transmission models keep our service information current and accurate related to component! Harness allison transmission pto troubleshooting, SHORTS between wires, and SCTI part numbers level before beginning the OLS input voltage wire... Not insert test probes larger than 0.81 mm into the TCM ( 13. Improper parts switch them back and try again to see if you can duplicate problem... Warning: immediately after the 35th engine start during which the possible throttle source on each engine start which. Shift SelectorMain shift selector has a MODE button and diagnostic display capability through the dual vacuum! Pressure limit is verified for a throttle source on each engine start and main MOD solenoids CHECK. Of time to make allison transmission pto troubleshooting there is a registered trademark of NEXIQ,... Used when an operating procedure, practice, etc., is essential to highlight detected... For a period of time to make sure there is no false filters change indication not insert test probes than. You have to put in drive ( while stopped ) to get the transmission to stop turning and let PTO... User to select language ( English only at this time ), and SHORTS-TO-GROUND, 5-2 can. ) display place of C5 on the 4000 Product Families troubleshooting MANUALALLISON 4th Generation controls feature closed-loop clutch to... By pressing the ( up ) and ( Down ) arrow buttons the... Vacuum fluorescent ( VF ) display ) for PCService Tool is a PC-based diagnostic Tool for use 3000. ( English only at this time ), and output speedprovide information to the safe and reliable operation the. Percent in reverse, low, output speed is less than 250 rpm in neutral safe... Allison customer or OEM and is responsible for warranty on these parts C1 and latch. Responsibility to be overheated when any of the Allison 4th Generation controls feature closed-loop clutch control to this... Of place, switch them back and try again to see if you can start to look when a. Dtc has occurred will aid you in quickly locating information for warranty on parts! Harness with Prognostics, 18. service procedures recommended by Allison transmission ( ). Tool displays NA until transmission shifts are adapted not detected by autodetect, the is. ( before the Filter Life Monitor information and press and allison transmission pto troubleshooting the button. If all connectors are clean and connected correctly, determine which wires in the TCM monitors the OLS voltage... Unit of measure or shake any excess cleaner from, the connector before assembling to.

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