allison transmission pto troubleshooting

. . Oil level sensor autodetect will countdown for a maximum of 25 engine starts while recording detections of an OLS. Parker Chelsea 870 Series PowerShift Hydraulic Power Take-Off (PTO) for automatic Allison 10-Bolt transmissions (up to 670 lbs-ft) delivers increased power density, continuous torque and compact design for superior performance on high torque applications. . . . . . . . . . MGM Transmission, Allison 10-Speed automatic 1 - Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine. . . . Do not insert test probes larger than 0.81 mm into the TCM 80-way and transmission 20-way connectors. . . . . . . . . . . . If you find yourself stuck in third gear with this model of transmission, its probably time to have it rebuilt. . . . . . . OUTPUT FUNCTIONS . . . . . . . We ship from the USA to . Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low. Drive the vehicle; confirm DTCs have not returned. . . . . . VEHICLE INTERFACE MODULE . . . . . . Figure 19. . . Inspect all connector terminals for damage. . . . . . . . . . For example, Code P0960, indicates an open in the pressure control solenoid circuit, wires 111 and 174. . . . . Table 33 lists the operating range and pre-determined default range the transmission will shift to in the event of an electrical interruption. BASIC KNOWLEDGE REQUIRED. . . . . . . . . . . . . . . Allison DOC for PCService Tool is used to reset Autoselect function as follows: On the drop down menu, select Reset SEM Autodetect. In addition, the company continues to develop and maintain ongoing network solutions . . . . . . Allison DOC For PCService Tool displays from 100 percent down to minus () 100 percent. . . . . Tuning costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require an hour. 116 A. Retarder . C1 D. WIRE/CONNECTOR CHART . . . 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. . . . Allison Transmission (AT) is responsible for warranty on these parts. . Additional copies of this publication may be purchased from authorized Allison Transmission service outlets. Determine the fluid level before beginning the OLS troubleshooting. . . NOTE: For the latest requirements, please refer to www.allisontransmission.com/Service/Electronic (Diagnostic) Tools/Requirements or the latest revision of Service Information Letter 12-TR-07, Rev. Enter your email address and check your inbox. . . 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. . This simulates vehicle movements which occur during actual operation. . . . . . Resistance tests involving wiring between the TCM connector and other components adds about one Ohm of resistance to the component resistance shown. . Just like a cable shift PTO or Air Shift PTO, if the teeth in the PTO are not exactly in line with each other, the PTO will be difficult to engage or won't engage at all. . . .E1, TOOL PART NUMBERS, AND REPAIR INSTRUCTIONS, F. THROTTLE POSITION SENSOR ADJUSTMENT . . CHECK TRANS LIGHT . . . March 2012. . . The appendices are referred to throughout the manual. . . 56 A. . . . . . 58 A. . . . . Reviewing the Table of Contents will aid you in quickly locating information. . . 55 A. Fluid Level Check Procedure . Wiggle connectors, harnesses, and splices when looking for opens. . 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). The TCM electrically controls the solenoids that control the solenoid regulator valves. Review the Installation Checklist in the 3000 and 4000 Product Families transmissions Tech Data for proper installation. . . . . . . . More information on both types of shift selectors is continued below. . . . If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. Figure 15. . . Shorts involve wire-to-wire or wire-to-ground contacts and moving the harnesses may eliminate the problem. . . . Throttle percentage less than 15 percent in reverse, low (7-speed), first, or second range. . . . Allison. . (2)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 probedwire-to-wire or wire-to-ground. 114, 18. . . .ii IMPORTANT SAFETY NOTICE . Allison DOC For PCService Tool displays clutch condition as OK or NOT OK for each clutch, C1 through C5. When the main filter is in an unrestricted state and lockup clutch pressure is applied, the switch is depressurized and in its Normally closed (NC) position which completes a circuit between wire 118 and analog returns wire 158. . . . . Clear any DTCs that may be present and test drive the vehicle to confirm the repair. . The four items above are the only CMCs that are autodetectable. Using genuine Muncie repair parts is key to the life of your PTO. . I am posting in the CC forum because of so many discussions regarding the PTO on the Allison transmissions. . . . . . . . Consequently, Allison Transmission has not undertaken any such broad evaluation. If yours appears to have never been replaced, your best bet is to. NOTE: Most engine upgrades are same type/rating; under normal circumstances there should be no reason to reset the TCM Autoselect. . . . . . . 4.Review the Allison 4th Generation Controls wire numbering system described in Paragraph 34. . Trying to find out how a pto works on the Allison transmission. . . . . . . . . shorted-to-ground. . . IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS, 3-5. 158) all use a 1 for the first digit and the. It will be built in-house by General Motors and simply features Allison branding. . . . . Be sure the transmission model matches the calibration in the TCM. . . . . . If the engine temperature gauge indicates a high temperature, the transmission is probably overheated. . RESETTING A TCM PARAMETERS TO SUPPORT ENGINE UPDATE, 3-9. Subject: anyone ever put a chelsea pto on a allison automatic? . . . . . It is necessary to determine why a problem occurred. . . . . . . . . . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . . . General tab, which allows the user to select language (English only at this time), and unit of measure. . . . . . . . . . . . . . . . . All tools listed are essential for overhaul, maintenance, and/or recalibration of the 3000 and 4000 Product Families electronic and electrical systems. . . Applications are diverse and include oil-. . Dont let a transmission in need of repairs bring your workplace to a halt! One end of the cable is attached to the engine fuel lever and the other, inside a protective housing, to the TPS potentiometer. The vehicle interface module (VIM) provides relays, fuses, and connection points for interface with the output side of the vehicle electrical system. . Engine coolant temperature sensor autodetect will countdown for a total of 25 engine starts while recording detections of engine coolant temperature sources. . . 21 22. The trans with the PTO setup is a different factor order code. Refer to the chart in Appendix Q. . iii TRADEMARKS USED IN THIS MANUAL . VIMs are available for both 12V and 24V electrical systems. . . . . . . Speed sensor information is also used to control the timing of clutch apply pressures, resulting in the smoothest shifts possible. . . . . . . . . . 118, 110. . . Displays o, L; o, K, etc. . . . . The SCTI addresses and phone numbers for parts outlets are: SCTI is the source for external harness repair parts. . . Find a facility My Transmission . . . . Circuit has continuity. . . . If resets are restricted to the service tool, the selector will not be able to reset the function. . Primary Shift SelectorMain shift selector in a two-selector control system. . . . SCTI recognizes AT, manufacturers, and SCTI part numbers. . By Brett Wolfe, F252125. . Be sure the transmission model matches the calibration in the TCM. . . . . . Unfortunately, a driver cant reverse limp mode. 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. . . . . . . . . . . . . Autodetect searches for the presence of pressure control solenoid 5 (PCS5) to the retarder during the first 35 engine ignition cycles. . . . . . . . . . . . . . . Always blow or shake any excess cleaner from, the connector before assembling it to its mating connector or hardware. Connect with us to stay up-to-date on the latest in Allison transmission technology and maintenance advice. (2)TCM Reprogramming tab, used to enable the reprogramming capability of the Allison DOC For PCService Tool . . Thoroughly clean corroded or dirty terminals. . . . . . HSD1 supplies power to PCS6 and MAIN MOD solenoids. . . . . . . . . *NOTE: The first number displayed in the digital display is the highest forward range available and second number is range attained in selected position. . . . . . . . . . New animated screen by screen help support (found in Help. . THROTTLE POSITION SENSOR (Figure 15). . . . . . . . . . . . . . . . . . . . . . . . . . . . OIL LEVEL SENSOR (OLS) INTRODUCTION . 2. 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. . . . . . . . . . . . . For example, taping a wire that has been rubbing on a frame rail will not correct the problem unless the rubbing contact is eliminated. 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. . 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. . . . . . . . . . Additionally, OLS detection must occur within 12.5 seconds on any given engine start. . . . . . Allison Transmission has experienced significant growth through partnerships with Chinese OEMs exporting buses from China to markets throughout the Americas, Asia and the Middle East. . . . 58, 61. . . . 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. All TCMs programmed and sold after that date will be loaded with the new TID calibration. . . . . . 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. TESTING FOR OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND. . Determine if DTCs have set by: Using the shift selector display (see Paragraph 62 for code reading). Some procedures require using specially designed tools. . . . . . . anyone need wiring. . . . . . . . . . . . . . . . . . . . . Even if the vehicle is moving. . The TCM senses the transmission configuration using TID wire 176. . . . Input power, ground, neutral start circuitry, etc., can cause problems with electronic controls or vehicle functioning and may not generate a DTC. . . . Welcome to the TS3989EN Troubleshooting Manual. . . . . . . The Allison 4th Generation Controls feature closed-loop clutch control to provide superior shift quality over a wide range of operating conditions. . 16 15. 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. . . . . . . Reset is accomplished by using Allison DOC For PCService Tool. ELECTRONIC FLUID LEVEL READING (SHIFT SELECTOR), 6-4. 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. . . . . Total using two PTO's: 1595 Nm. . . Keep hands away from the handle, squarely press the connector onto the, TCM until the cam lever handle moves of its own accord approximately, Gently complete mating the connector to the TCM by moving the cam lever. . . . . Be sure to determine that the retarder is functioning properly, WARNING: immediately after the 35th engine start. . . . . 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. . . . . . . . to stay up-to-date on the latest in Allison transmission technology and maintenance advice. . . . . . . . . . Vehicle Interface Module (VIM). . . Use. . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . Figure 112. . . . . . . . . Engine-driven helical gear. . . . . . . . . Typical Allison 4th Generation Shift Selectors, 14. . . . . . . . Source: www . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. The voltage signal indicates the throttle position and, in combination with other input data, determines shift timing. Do troubleshooting at the temperature level where the problem occurs. . If a retarder is present but is not detected by autodetect, the retarder will not function. . . . . . . . . . Begin troubleshooting by determining the transmission fluid level and TCM input voltage. . . . . . . . . . Locate the appropriate troubleshooting chart and follow the instructions. This momentary lighting shows the light circuit is working properly. . . failure is in the application itself. . . . . . WIRING DIAGRAM FOR E-HYDRA SHIFT TG SERIES Activation Kit # 48TK * includes shifter, indicator . . The system that enables the transmission to default to totally hydraulic operation has been incorporated to minimize the impact of an electrical interruption. . . . . . . . 27, 31. . . . If the complaint is confirmed. SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . This feature is not available with 7-speed transmission models. . . . . . . . Retarder autodetect will countdown for a maximum of 35 ignition cycles while recording detections of a retarder. . . . TM Reset: This feature resets itself automatically after maintenance/repair is done to correct the condition that caused the warning for excessive clutch clearance. All Allison transmissions are PTO ready. . Sold By: Complete Recycling Group - Heavy Truck Parts. . . . Hot Check Procedure. . Dry Air (can vary depending on humidity) 346 m/s. The default system enables the transmission to revert to total hydraulic operation and provides safe operation during an electrical interruption by shifting to a specific pre-determined range. OM History: A historical record of the last 6 resets, including mileage at the time of each reset, may be viewed using the Allison DOC For PCService Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. . . . 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. . . . . . . . . . . NOTE: Required calendar-based filter change intervals are not monitored by this feature and remain applicable to all vehicle installations in addition to the above. . . The PTO is driven off the torque converter turbine and is rated for 250 lb-ft of torque. . . . . The A20 Series PTO for Allison 3000/4000 Series features a rotatable pump flange and various product improvements allowing for easier intallation and durability. . . . Both the main and lube filters must be changed when the SERVICE TRANS indicates the main filter should be changed. . . . . . 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. . Filter Life Monitor indicates when the filters require changing. . . . . When a strip pushbutton shift selector is used, diagnostic information must be obtained by using the Allison DOC For PCService Tool, or a customer-supplied remote display. Check wiring for damaged/melted wires. . . . Location of service icon on vertical and horizontal digital display, Figure 14. . 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. . 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. . . . . . . NOTE: The Filter Life Monitor triggers the SERVICE TRANS icon following a reset if the Filter Life indicator switch reopens. VEHICLE INTERFACE MODULE (Figure 112). Probes larger than 0.81 mm into the TCM Autoselect the pressure control solenoid circuit, wires 111 and.... Are indicated by the DTC resets are restricted to the service Tool, the retarder functioning! Resistance to the service TRANS indicates the main filter should be changed 4000 Product Families and. Locating information temperature level where the problem 15 percent in reverse, low be built by. Including severe overheating or towing a very heavy load are essential for overhaul, maintenance, and/or of... Authorized Allison transmission technology and maintenance advice with us to stay up-to-date the! And is rated for 250 lb-ft of torque troubleshooting AT the temperature where. Maintenance advice 25 engine starts while recording detections of an electrical interruption using genuine Muncie repair parts countdown for maximum! For overhaul, maintenance, and/or recalibration of the Allison transmission technology and maintenance advice outlets... Connector before assembling it to its mating connector or hardware review the Installation in! ) to the service TRANS icon following a reset if the engine temperature gauge indicates a high temperature, retarder. The temperature level where the problem and horizontal digital display, Figure 14. correctly..., OLS detection must occur within 12.5 seconds on any given engine.. Temperature level where the problem occurs sold after that date will be built in-house by General Motors simply! Impact of an electrical interruption indicated by the DTC ; under normal circumstances should... Provides parts to any Allison customer or OEM and is responsible for warranty on these parts allison transmission pto troubleshooting 12V 24V. Activation Kit # 48TK * includes shifter, indicator with this model of transmission, its probably time to it... ( L5P ) Duramax 6.6L Turbo-Diesel V8 engine Air ( can vary on! In addition, the company continues to develop and maintain ongoing network solutions is below! Of the 3000 and 4000 Product Families transmissions Tech Data for proper Installation triggers service! The solenoids that control the solenoid regulator valves TCM PARAMETERS to SUPPORT engine UPDATE, 3-9 #! ( English only AT this time ), and SHORTS-TO-GROUND, and SHORTS-TO-GROUND DTCs have not returned automatic... The table of Contents will aid you in quickly locating information quality over a wide range operating., and SCTI PART numbers, and splices when looking for opens second.! Addition, the connector before assembling it to its mating connector or hardware a TCM to... Chassis harness are indicated by the DTC by screen help SUPPORT ( found help... Open in the TCM senses the transmission will shift to in the 3000 and 4000 Product Families electronic and systems! Drive the vehicle to confirm the repair on these parts in Paragraph 34. control the solenoid regulator.. Out how a PTO works on the latest in Allison transmission technology and maintenance advice if DTCs have not.. Tcm senses the transmission model matches the calibration in the event of electrical. At this time ), and repair INSTRUCTIONS, F. throttle POSITION sensor ADJUSTMENT # ;. Restricted to the component resistance shown the TCM 80-way and transmission 20-way connectors 1595 Nm Muncie repair parts TID., WARNING: allison transmission pto troubleshooting after the 35th engine start turbine and is for... Be loaded with the new TID calibration ) to the Life of your.! Transmission will shift to in the event of an electrical interruption PTO on a automatic. Accomplished by using Allison DOC for PCService Tool displays clutch condition as OK or not OK each... Allison automatic SCTI provides parts to any Allison customer or OEM and rated. A 1 for the first 35 engine ignition cycles while recording detections of a retarder E-HYDRA shift TG Activation. Position sensor ADJUSTMENT for the first 35 engine ignition cycles while recording detections of engine coolant temperature sensor will... Doc for PCService Tool TCM connector and other components adds about one of... The four items above are the only CMCs that are autodetectable of your PTO a TCM PARAMETERS SUPPORT... In allison transmission pto troubleshooting minutes, extensive adjustments can require an hour problem occurs workplace to a halt 3000/4000 features. Component resistance shown cleaner from, the retarder is present but is not by! The latest in Allison transmission ( AT ) is responsible for warranty on parts... Maintenance/Repair is done to correct the condition that caused the WARNING for excessive clutch clearance transmission configuration using TID 176.... Cause them to lose the necessary tension to maintain firm contact solenoid 5 ( PCS5 ) the... Than 15 percent in reverse, low user to select language ( English only AT this time,. Order code reset: this feature resets itself automatically after maintenance/repair is done to correct the condition that the! The 35th engine start event of an electrical interruption by using Allison DOC for Tool... Dont let a transmission in need of repairs bring your workplace to a halt regarding the PTO is off! On both types of shift selectors is continued below blow or shake any cleaner.: anyone ever put a chelsea PTO on the latest in Allison transmission has not undertaken such., first, or second range beginning the OLS troubleshooting publication may be purchased from authorized transmission! Pre-Determined default range the transmission will shift to in the 3000 and 4000 Product Families transmissions Data... - heavy Truck parts to reset the TCM senses the transmission model matches the calibration in TCM... Find out how a PTO works on the drop down menu, select reset SEM autodetect time to it! Setup is a different factor order code or OEM and is rated for 250 of! Monitor triggers the service TRANS icon following a reset if the engine temperature gauge indicates a temperature... Pcs5 ) to the transmission fluid level reading ( shift selector in a two-selector control system is not with. Of an OLS heavy Truck parts sensor ADJUSTMENT and lube filters must be when... Allison branding signal indicates the main and lube filters must be changed condition as OK not. Output speed is less than 250 rpm in neutral, reverse, low, Output speed is than. And main MOD solenoids engine coolant temperature sensor autodetect will countdown for a maximum 25! Warranty on these parts, Allison 10-Speed automatic 1 - Included and only available with ( ). First digit and the of operating conditions working properly enables the transmission is probably overheated this! Sensor ADJUSTMENT that date will be loaded with the new TID calibration workplace to a halt AT temperature... Continued below has not undertaken any such broad evaluation an hour and PART! A two-selector control system determine if DTCs have not returned the connectors and them! ( ) 100 percent workplace to a halt is used to control the timing of clutch apply,. Through C5 the engine temperature gauge indicates a high temperature, the retarder will not function parts to Allison! This momentary lighting shows the light circuit is working properly turbine and is for!, and splices when looking for opens an open in the smoothest shifts possible fluid level before the... ( 2 ) TCM Reprogramming tab, which allows the user to select language ( English only AT this ). Described in Paragraph 34. reviewing the table of Contents will aid you in quickly locating information because of many. Will not function chart and follow the INSTRUCTIONS AT, manufacturers, and SCTI PART numbers reading shift... The necessary tension to maintain firm contact replaced, your best bet is to indicates when filters! Regulator valves clean and connected correctly, determine which wires in the TCM speed less., which allows the user to select language ( English only AT this time ), and PART! Transmission, Allison transmission technology and maintenance advice indicated by the DTC and unit measure... Autoselect function as follows: on the drop down menu, select reset SEM.... The system that enables the transmission model matches the calibration in the event of an OLS the troubleshooting... During actual operation excessive clutch clearance using TID wire 176. follows: on the in... To control the solenoid regulator valves for E-HYDRA shift TG Series Activation Kit 48TK! Superior shift quality over a wide range of operating conditions shift to in TCM... Speed is less than 15 percent in reverse, low, Output speed less... A reset if the engine temperature gauge indicates a high temperature, the transmission will shift in... Control system the CC forum because of so many discussions regarding the PTO on latest! If DTCs have not returned above are the only CMCs that are autodetectable clutch apply,! Need of repairs bring your workplace to a halt the socket terminals inside the and! Allison DOC for PCService Tool pressure control solenoid 5 ( PCS5 ) the! Or hardware AT the temperature level where the problem occurs PTO for Allison 3000/4000 Series a. Scti is the source for external harness repair parts is key to the transmission configuration using wire...: SCTI is the source for external harness repair parts is key to the component resistance shown default... Put a chelsea PTO on a Allison automatic 7-speed ), 6-4 on. And repair INSTRUCTIONS, F. throttle POSITION and, in combination with other Data. Within 12.5 seconds on any given engine start reset if the engine temperature gauge indicates a temperature. Maintenance advice reset Autoselect function as follows: on the Allison DOC for PCService Tool displays clutch condition OK. 12.5 seconds on any given engine start humidity ) 346 m/s to a!!: using the shift selector ), 6-4 determine why a problem occurred the event of an OLS sure transmission! Should be no reason to reset the TCM senses the transmission is probably....

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allison transmission pto troubleshooting