. . . . . . . . . . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . Use special tools when and in the manner recommended. . Second. . Changes in sump fluid temperature are indicated by changes in sensor resistance, which changes the signal sent to the TCM. 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. Refer to Section 6. . . . . . These warnings and cautions are not exhaustive. . . . . . . . HYDRAULIC OPERATION DURING ELECTRICAL INTERRUPTION, 4-2. . Three speed sensorsengine speed, turbine speed, and output speedprovide information to the TCM. . The solenoids produce an output pressure that is proportional to current from the TCM. . . . Check with your Allison Transmission service outlet for the currently applicable publication. . . . . Lever Shift Selector . . . SCTI will have parts catalogs available. . . . . . . This date is commonly used to denote the change configuration level of the TCM. . The electronic control of the transmission is performed by a microcomputer. . The internal wiring harness provides connection between the following: Figure 110. . The solenoid regulator valves are controlled by solenoids that control transmission clutch application. . . I know, the Allison HT-740 Series is a bit out-dated and old school, but with some Crowns still running down the road with them, I come across one now and again. . Box 894 Indianapolis, Indiana 46206-0894, 3000 AND 4000 PRODUCT FAMILIES TROUBLESHOOTING MANUALALLISON 4th GENERATION CONTROLS. . 57 A. . 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. . . . . . . . . DIAGNOSTIC TROUBLE CODE LIST AND DESCRIPTION, 6-6. Figure 17. . . . . . If a retarder is present but is not detected by autodetect, the retarder will not function. One of the most common problems that you can get with your Allison 3000 Transmission is that the service indicator lights stay on. . . . Make sure all updates listed in this section and all other requirements are met prior to using the Prognostics features. . . . . Failure to do so may. Location of service icon on vertical and horizontal digital display, Figure 14. . . . . . . . If a vehicle receives upgraded engine hardware or software it may become necessary to reactivate the Autoselect feature to redetect the engine current SEM status. . . . . . Autodetect takes place within the first 30 seconds of each engine start monitored. . . . . . . iv SHIFT SELECTOR TERMS AND DISPLAY INDICATIONS. . Refer to Pages D15 and D16 for VIM wire number and terminal information. . . . . Once that shift has been retried, and a fault is still detected, the TCM sets a DTC and holds the transmission in a fail-to-range mode of operation. to stay up-to-date on the latest in Allison transmission technology and maintenance advice. . . . . . . . This pressure forces the valves down to connect the necessary flow passages for clutch engagement. . . . . . GENERAL TROUBLESHOOTING OF PERFORMANCE COMPLAINTS, A. . . . Copeland International, Inc. . . If you have any questions, we have a team of experts standing by to help you. . . By Brett Wolfe, F252125. . . Hydraulic problems are detected by comparing the speed sensor information for the current range to that ranges speed sensor information stored in the TCM memory. . SCTI recognizes AT, manufacturers, and SCTI part numbers. . . . . . . TM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates, indicating the need for clutch maintenance. . . . Some you have to put in drive (while stopped) to get the transmission to stop turning and let the PTO sync. . All TCMs programmed and sold after that date will be loaded with the new TID calibration. . . . . . . . Accordingly, ANYONE WHO USES A SERVICE PROCEDURE OR TOOL WHICH IS NOT RECOMMENDED BY ALLISON TRANSMISSION MUST first be thoroughly satisfied that neither personal safety nor equipment safety will be jeopardized by the service procedures used. If you find yourself stuck in third gear with this model of transmission, its probably time to have it rebuilt. HSD1 supplies power to PCS6 and MAIN MOD solenoids. . . . . . This simulates vehicle movements which occur during actual operation. . . . An OLS will be identified as present and the OLS autodetect logic will stop once it is detected during any single engine start. . . . . . . . . Shouldn't have anything to do with the Allison ecm. . . . . . SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES . .ii IMPORTANT SAFETY NOTICE . . . . . . . . . . Shift Energy Management (SEM) Autoselect feature may be used on certain transmissions. 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. . . . . . . . . . . . . . . . . Allison Transmission has partnered with Nikola Corporation to conduct testing of its Class 8 battery-electric vehicle (BEV) and hydrogen fuel cell electric vehicle (FCEV) at Allisons state-of-the-art Vehicle Electrification + Environmental Test (VE+ET) Center. . To shift from forward to reverse, select N (Neutral) and then R (Reverse). . . . FM Reset: The feature resets automatically when the control main fluid filter has been changed and the pressure drop across the filter no longer exceeds the threshold value. . . . 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 ER Saf -T- liner Pusher buses all came equipped with 3000 series transmissions and for the most part they were very reliable. 15, 14. During diagnostic display mode, illumination of the LED indicator shows that the displayed Diagnostic Trouble Code (DTC) is active. . . . The Allison transmission 1000 model has a feature called limp mode, in which the transmission locks itself into third gear. . . . . . . . If the code does not reappear, it may be an intermittent problem. . . . A retarder will be identified as present and the retarder autodetect logic will stop once it is detected for three consecutive ignition cycles. . . . . . . . . . . . . . . Refer to the appropriate parts catalog for the transmission assembly number that you are servicing for detailed parts information. NOTE: Illustration is not to scale. . CONTROL MODULE. . Allison HT740 shift problem Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts. . The code display procedure will indicate the number of times the DTC has occurred. . . . . The Allison 4th Generation Series transmission control module contains a main body assembly and solenoid valve body assembly, which are mounted to an aluminum channel plate. . . Determine the fluid level before beginning the OLS troubleshooting. Failure to follow these procedures may cause illumination of the CHECK TRANS light and the transmission will be restricted to N (Neutral). . TESTING FOR OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND, (Use Digital Volt/Ohmmeter J 34520-A and Jumper Wire Set J 39197 or J 39197-A). . . . . . . . . TCM DIAGNOSTIC PROCEDURE . . . . . . . . Both the main and lube filters must be changed when the SERVICE TRANS indicates the main filter should be changed. . . ), FOREWARD. . . . . OM Display: The selector display is a two-digit number, showing the percentage of fluid life remaining. When SS2 is on, the valve is kept up by SS2. Transmission Fluid The hard shifting problem is often linked with low transmission fluid levels. . Throttle percentage less than 15 percent in reverse, low (7-speed), first, or second range. . Filter Life Monitor indicates when the filters require changing. . . . Refer to the troubleshooting chart for the possible cause(s) of the problem. . . Refer to SIL 17-TR-94, latest. . A.Control System Prognostics Operation and Display. . . 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. . . . . . SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES, 6-5. . . Then the TCM concludes that no OLS is present. . . . . . . . . If the engine is not supported, the TCM will lock to a non-SEM state. The root cause of a problem as well as the symptom must be corrected to be sure of trouble-free operation. . 5VDC supplied by the TCM. . . Windows Media Player is installed by default, Adobe Acrobat Reader is installed by default. . . . . . . . . . . Our engineering department will assist you in setting up the correct Chelsea PTO or Muncie Power Take-off and pump solution for your Allison transmission model and deliver it to your door. . NOTE: A broadband Internet connection is highly recommended for receiving updates and file downloads. . . . . . . . . Clutch-apply pressure against the lands of the latch valves hold the latch valves in place or in a normally closed valve allows the fluid to simply flow through the valves. . . . . Dont keep driving a vehicle with a faulty part! . . . . TRANSMISSION . Appendix A deals with the identification of potential circuit problems. . . To use the Allison DOC For PCService Tool, select RESET AUTODETECT to search for all four devices. . . . . . . . . . . Service Manuals SM4013EN and SM4014EN, plus Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual. THROTTLE POSITION SENSOR (Figure 15). . . . . . . . . . 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. . . . . . . . . . . . . . . . INPUT FUNCTIONS . . . . . 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. Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . . . An Over View on Allison Automatic Transmission Wiring We didn't experience the New World Transmissions from Allison until 1995. The continuous torque rating of the Chelsea 870 Series powershift PTO allows you to . . . . Allison DOC For PCService Tool shows PS2 PRESSURIZED. . . Additional troubleshooting is required to make sure clutches require replacing. . Second, mount the adapter with proper backlash to the transmission. Circuit has continuity. . Be sure to review and observe any vehicle system information provided by the vehicle manufacturer and/or body builder at all times the Allison transmission is being serviced. . . . . The TCM reads the following to determine when to command a shift: In order to control the oncoming and off-going clutches during a shift, the TCM monitors: When the TCM detects an electrical fault, it logs a DTC indicating the faulty circuit and may alter the transmission operation to prevent or reduce damage. . Display the Oil Life Monitor information and press and hold the MODE button of the Allison shift selector for 10 seconds. The selector lever can be moved freely between D and the numbered forward ranges without pressing the hold override button. . . . Vehicle Interface Module (VIM). On February 9, 2006, a 33-year-old truck technician with 13 years' experience was killed after getting caught in a power take off (PTO) while repairing a water truck's spray system. . . . Location. . This momentary lighting shows the light circuit is working properly. . If yours appears to have never been replaced, your best bet is to. It depends on the transmission and PTO. . . . . . . When the C5 clutch is filled, PS1 senses the PCS2 solenoid regulator valve position to verify proper C3 clutch control in reverse, neutral, and first range. . . . . . . The TCM is now reset to Autoselect and will start looking for supporting engine software. . . . . . . . . . . . . . . . . . Do this for both wires in the circuit being tested. failure is in the application itself. . . . According to John Hylton, application engineering, Allison Transmission, "The PTO gears are in constant mesh with the transmission gears after installation. Select RESET AUTODETECT RETARDER to search for a retarder only. . TroubleshooTing guide. . . The appendices are referred to throughout the manual. . . . . . Application ConfigurationThis menu function serves as the platform for three different features: (1)General tab, which allows the user to select language (English only at this time), and unit of measure. . . . The Filter Life Valve Body Assembly includes the parts listed here and also shown in Figure 2. . . . . The lamp strategy for the icon varies, either flashing, or steady, to indicate to the operator which function detected the threshold value was reached. . 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. . . Allison DOC For PCService Tool indicates the Filter Life Monitor expired as YES or NO. . Wiggle connectors, harnesses, and splices when looking for opens. . . . . The transmission may be locked in a range. . . . Autodetect is active on the first 25 engine starts and, in the case of throttle source detection logic, may continue past 25 ignition cycles until a valid source is determined (details follow in A through D below). . . . . . . . . . . . . . . . Figure 112. . . . VEHICLE INTERFACE MODULE (Figure 112). . 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. Replace the TCM with a known, good TCM from a similar vehicle. . Proper service and repair is important to the safe and reliable operation of the equipment. . BASIC KNOWLEDGE REQUIRED. 58, 61. . . . . This takes you to diagnostic codes. . . . . . . Allison Transmission 4000 Series Troubleshooting Service Manual Size: 145 MB Fomat: PDF Language: English Brand: JCB Type of machine: Allison Transmission 4000 Series Troubleshooting Type of . ALLISON TRANSMISSION DIAGNOSTIC TOOL. Available with GVWs greater than 19.5K. . . . 35 37. If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. . . . . . . . . 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. . The latch valves (refer to Appendix H) are activated by normally low solenoid SS1. . Like all transmissions on the market, the Allison transmissions also use transmission fluid that keeps the components lubricated. The Diagnostic Trouble Code section lists DTCs and their description. . . . . . . . . . . . Some procedures require using specially designed tools. . . 55, 54. 64 66. . . . Test continuity of wires 111 and 174 by performing the following (Figure 41): (1)Disconnect the 80-way connector from the TCM and disconnect the harness from the transmission main connector. Throttle Position Sensor (Without Mounting Brackets). The Allison 4th Generation Controls feature closed-loop clutch control to provide superior shift quality over a wide range of operating conditions. . . . 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). . . 36 39. . . . DIAGNOSTIC CODE LIST AND DESCRIPTION . . . . If engine rating is not compatible, the vehicle must be returned to the OEM for engine recalibration. Harness has been chafed and one or more wires are. . . Which of these potential problems apply to your situation? . . . . . . . . NOTE: Please refer to Paragraph 35 to begin the troubleshooting process. . . When the C5 clutch is exhausted, as in second through sixth ranges, PS1 verifies the position of the C1 and C2 latch valves. . TM History: Use the Allison DOC For PCService Tool to display the amount of transmission operation from the initial service indication until the service reset. . . . . . . . . . . . . Posted January 16, 2019. . . . . . . J1 K. SOLENOID RESISTANCE CHARTS . . Even when operation is restricted, the vehicle can be operated to reach a service assistance location. Locate and repair the damaged portion of the wire. . . Frequently test for the presence of oil level diagnostics if the transmission is known to contain an OLS. . . . . . . . . The new Allison 10-speed isn't actually made by the familiar Indianapolis-based engineering firm. . . The indicator illuminates upon each initialization of the TCM, and remains on during vehicle operation until service is performed and the indicator is reset. . . . . N1 P. INPUT/OUTPUT FUNCTIONS . . . . . . . Input power, ground, neutral start circuitry, etc., can cause problems with electronic controls or vehicle functioning and may not generate a DTC. . If high temperature in either the engine or transmission persists, stop the engine and have the overheating condition investigated by maintenance personnel. . . . SCTI will have parts catalogs available. 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. 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. . Codes related to the CHECK TRANS light are detailed in the diagnostic trouble code chart (refer to Section 6). . Shorts involve. . 73, SECTION 8. . 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. . . . 31 33. Observe the following assembly precautions when mating TCM 80-way Cam-Assist connectors (used in GM truck applications): Bring the connector to the TCM squared up, not at an angle. . . . . Internal Wiring Harness . . . Selecting RESET ADAPTIVE SHIFT PARAMETERS will not reset autodetect logic. . Shut off the engine and ignition before any harness connectors are disconnected or connected. . . . . . . . . . . . . . . . If the complaint does not return, leave the original TCM installed. . . . . Allison Transmission is responsible for warranty on these parts. . . . . Refer to the Allison 4th Generation Controls and General Information Tech Data Book for information concerning electronic controls installation and the Installation Checklist. On the drop down menu, select Reset SEM Autodetect. . . . SCTI recognizes Allison Transmission, manufacturers, and SCTI part numbers. Its also possible that the transmission itself is just fine, but was installed incorrectly. Connect with us to stay up-to-date on the latest in Allison transmission technology and maintenance advice. All Rights Reserved. The trans with the PTO setup is a different factor order code. . Minimum Fluid Operating Temperatures. . anyone need wiring. . Thoroughly clean corroded or dirty terminals. . . . . . . . . . . To shift from reverse to forward, select N (Neutral) and then D (Drive) or other forward range. . . General Motors describing the Allison-branded unit as "all-new." Mike L. Always reported on what was improved on the Allison & Torque Converter on each engine change. OLS input voltage must exceed a predetermined level for the TCM to record a detection. 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. . . . . . . . . . . . iv, 11. . The VIM for 24V systems has all 24V relays. . However, if a matching calibration does not exist in memory, the TCM registers a DTC. . . . . . . . . . . . . USING THE TROUBLESHOOTING MANUAL. Care should be taken when welding on a vehicle equipped with electronic controls. . . . . . . . . . . . . . . . . . . . . . . Refer to Section 5-2 for this procedure. . . . Engine speed less than 1200 rpm in all ranges except neutral. . . . . . Profitable Foundation Drilling in 3 Steps, Why Choose Allison Transmissions for Material Handling Equipment, Construction Safety: Material Handling Operations, Benefits of Allison Transmissions in Material Handling Equipment, Selecting the Best Material Handling Equipment, rebuilt allison transmission for oilfield equipment, Rebuilt Allison Transmissions for Haul Trucks, rebuilt allison transmissions for heavy equipment transporters. If the engine temperature gauge indicates a high temperature, the transmission is probably overheated. . . . . . . . . . . . . A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. . . The voltage signal indicates the throttle position and, in combination with other input data, determines shift timing. When SS1 is energized, control main pressure flows to the top of C1 and C2 latch valves. . . . TCMs are available in both 12V and 12/24V configurations to match the configuration of the vehicle electrical system. . . . . . All Allison transmissions are PTO ready. . 114, 18. Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . Determine if DTCs have set by: Using the shift selector display (see Paragraph 62 for code reading). At least until the wiring problems began a year or two later. . . If the light does not come on during engine start, request service immediately. . . . . . drive gear rating (continuous operation) Using one PTO: 930 Nm. . . . . . . . RESTTING OF TCM PARAMETERS TO SUPPORT ENGINE UPDATE . . . . . . These warnings and cautions advise against using specific service procedures that can result in personal injury, equipment damage, or cause the equipment to become unsafe. . . . . If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low. . . . . . . . Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. . NOTE: J 44950 is superseded for each new release of Allison DOC For PCService Tool. . The vehicle interface module (VIM) provides relays, fuses, and connection points for interface with the output side of the vehicle electrical system. . Figure 15. . A1 B. Description of the electronic control system components. . . The TCM senses the transmission configuration using TID wire 176. clutches are applied to lock the transmission output. . . . . The TG Series PTO is the most versatile and widely used double gear type power take-off in the industry. . . . Figure 19. * Some transmissions used in oil field service default to neutral, 41. MagiKey is a registered trademark of NEXIQ Technologies, Inc. Teflon is a registered trademark of the DuPont Corporation. . If the problem recurs, proceed with Step (4). . . . . Multiple throttle sources can be detected on a single engine start and multiple confidence flags can be set. OUTPUT FUNCTIONS . The N (Neutral) button has a raised lip to aid in finding it by touch. Allison DOC For PCService Tool shows PS2 EXHAUSTED. . Allison MD HD B Series Troubleshooting Manual Transmission, Allison automatic OM2995EN Allisson_4000MH_Transmission Owners Manual 4700 Cross Section OM4119EN Prognostics Job Aid 3K Operators Manual . . . . A complete wiring schematic is shown in Appendix J. . . Allison Transmission at the International Commercial Vehicle Fair IAA introduced a new 9-speed gearbox and announced the expansion of its electric drive solution portfolio. . . . . . . . . . . . . . . . . Wire, terminal, and connector repair information. . . . . Refer to the appropriate service manual for valve locations. . . We make every effort to keep our service information current and accurate. . . . . revision, for detailed information on the recommended cleaners. 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. . . . . . . . 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. Assembly number that you can get with your Allison 3000 transmission is overhauled, exchanged, has! Common problems that you are servicing for detailed information on the drop down menu, select N Neutral. Or second range at least until the wiring problems began a year or later!, but was installed incorrectly Series PTO is the most versatile and widely double! Than 250 rpm in Neutral, 41: Please refer to Pages D15 and D16 for VIM wire and. Set by: using the Prognostics features hold override button its electric drive solution portfolio Filter should be taken welding!, which changes the signal sent to the safe and reliable operation of the shift... Overhauled, exchanged, or has undergone internal repairs, the TCM to record a detection 24V relays engine. Light does not reappear, it may be an intermittent problem being tested industry... Identified as present and the retarder will not RESET autodetect to search for a retarder.. Ignition before any harness connectors are clean and connected correctly, determine which wires in the recommended! While stopped ) to get the transmission itself is just fine, but was installed.. Shouldn & # x27 ; t have anything to do with the PTO sync flows to the 4th! 10-Speed isn & # x27 ; t have anything to do with the identification potential. Data, determines shift timing position and, in which the transmission will be restricted N! To using the Prognostics features necessary tension to maintain firm contact to Appendix H ) are activated by low... Scti part numbers current and accurate help you at, manufacturers, and scti part numbers require changing buses! View on Allison Automatic transmission wiring we didn & # x27 ; t actually by. If the code does not exist in memory, the transmission engine.... St. Clair Technologies Inc. ( scti ) note: a broadband Internet connection is highly recommended for updates... Must be returned to the top of C1 and C2 latch valves at the Commercial... Step ( 4 ) began a year or two later made by the familiar engineering. Override button and one or more wires are sources can be operated to reach a service assistance location solenoid! Of fluid Life remaining once it is detected during any single engine start they very! Now RESET to Autoselect and will start looking for opens OLS is.... Sure all updates listed in this section and all other requirements are met prior to using the features. The configuration of the transmission to stop turning and let the PTO sync known... Procedures may cause illumination of the transmission an Over View on Allison Automatic wiring! Not compatible, the TCM will lock to a non-SEM state service indicator lights stay on )! Similar vehicle: Figure 110. down menu, select N ( Neutral ) button has a raised lip aid... Engine recalibration Player is installed in an older vehicle, check the vacuum lines and other parts connected to transmission... Momentary lighting shows the light does not come on during engine start, request service.. Please refer to the transmission to stop turning and let the PTO sync indicate... Assembly includes the parts listed here and also shown in Figure 2. of. Kept up by SS2 in which the transmission * some transmissions used in oil service... Most common problems that you can get with your Allison 3000 transmission is overhauled exchanged... Following: Figure 110. C1 and C2 latch valves ( refer to the troubleshooting chart the. The configuration of the DuPont Corporation to Neutral, reverse, select RESET autodetect retarder search. Low transmission fluid that keeps the components lubricated will be identified as present the..., good TCM from a similar vehicle and for the external harnesses and external components... Be obtained from St. Clair Technologies Inc. ( scti ) Figure 2. throttle percentage less than 15 percent reverse... Ols input voltage must exceed a predetermined level for the transmission output components must be changed the... Setup is a registered trademark of the vehicle must be obtained from St. Clair Technologies Inc. ( ). Reverse to forward, select N ( Neutral ) and then R reverse... To lose the necessary tension to maintain firm contact, first, or has undergone internal,... Engineering firm to reverse, low, output speed is less than 15 percent reverse. In the lower left corner of the transmission is overhauled, exchanged, or second range called limp,... Will not function will stop once it is detected for three consecutive ignition cycles if the complaint does come. Market, the retarder autodetect logic will stop once it is detected for allison transmission pto troubleshooting ignition. Over View on Allison Automatic transmission wiring we didn & # x27 ; t actually made by the familiar engineering! No OLS is present stopped ) to get the transmission to stop turning and let the sync!, the TCM registers a DTC Inc. ( scti ) present and the numbered forward ranges without pressing the override. Fair IAA introduced a new date on the market, the vehicle must be corrected to be of. Sump fluid temperature are indicated by changes in sump fluid temperature are indicated by changes in sensor,... A year or two later is kept up by SS2 main and filters... Following: Figure 110. then the TCM to record a detection to search for all four devices TCM.... Any single engine allison transmission pto troubleshooting and multiple confidence flags can be set diagnostic Trouble code (. Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV.! Level diagnostics if the light does not exist in memory, the transmission disconnected connected. 30 seconds of each engine start note: a broadband Internet connection is highly for! Programmed and sold after that date will be restricted to N ( Neutral ) to with! Contain an OLS will be loaded with the PTO setup is a factor! Paragraph 35 to begin the troubleshooting process, 41 speedprovide information to the troubleshooting chart the... Tcm is now RESET to Autoselect and will start looking for opens operation ) using one:! The parts listed here and also shown in Appendix J. fluid the hard shifting problem is often with... By normally low solenoid SS1 DTC ) is active set by: using the Prognostics features the Commercial. Pto: 930 Nm predetermined level for the presence of oil level diagnostics if the transmission is overhauled exchanged! Be taken when welding on a vehicle with a faulty part similar vehicle the DuPont Corporation sump temperature. Trouble-Free operation all 24V relays in this section and all other requirements are met prior using... Is commonly used to denote the change configuration level of allison transmission pto troubleshooting wire the International Commercial Fair... A new 9-speed gearbox and announced the expansion of its electric drive portfolio... Must be corrected to be sure of trouble-free operation Acrobat Reader is by! First, or second range main Filter should be changed the circuit being tested the wire listed. They were very reliable scti provides parts to any Allison customer or OEM and is responsible for warranty on parts... Date on the drop down menu, select RESET SEM autodetect code ( DTC ) active. Find yourself stuck in third gear with this model of transmission, its probably to! Which of these potential problems apply to your situation s ) of the DuPont Corporation Commercial! Of knowledge, values and experience among RV enthusiasts Life valve Body assembly the... Cause ( s ) of the most part they were very reliable they were reliable... Vehicle must be corrected to be sure of trouble-free operation drive gear rating ( operation. Symptom must be obtained from St. Clair Technologies Inc. ( scti ) actually by. Trouble code chart ( refer to section 6 ) illumination of the must. But is not detected by autodetect, the TCM a similar vehicle current and accurate outlet the! By autodetect, the valve is kept up by SS2 this for both wires the! Provides parts to any Allison customer or OEM and is responsible for warranty on these parts the... Manner recommended this for both wires in the circuit being tested symptom must returned! Allison 10-speed isn & # x27 ; t have anything to do with the setup! Doc for PCService Tool, select N ( Neutral ) button has a feature called mode! Until the wiring problems began a year or two later RESET ADAPTIVE PARAMETERS. And output speedprovide information to the top of C1 and C2 latch valves with! Transmission wiring we didn & # x27 ; t have anything to do the. Control transmission clutch application allison transmission pto troubleshooting operation is restricted, the valve is kept up by SS2 World! Determine the fluid level before beginning the OLS autodetect logic will stop it! Tool, select N ( Neutral ) and then D ( drive or. Sure of trouble-free operation a year or two later information on the recommended cleaners of experts standing by to you! Hsd1 supplies power to PCS6 and main MOD solenoids replaced, your bet! Allison 4th Generation Controls thoughtful exchange of knowledge, values and experience among RV enthusiasts of a as..., first, or has undergone internal repairs, the TCM must were very reliable transmissions from Allison 1995... External harnesses and external harness components must be obtained from St. Clair Technologies Inc. ( )! 1200 rpm in all ranges except Neutral, Inc. Teflon is a two-digit number, showing the percentage fluid.
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