. . . . . . . . . . . . . . . . . . The Allison DOC For PCService Tool can also be used to override autodetect and manually enter the component or sensor to be recognized by the TCM by changing appropriate customer modifiable constants (CMC). . If temperatures do not decrease, reduce the engine rpm. Drive the vehicle; confirm DTCs have not returned. . . . . Table 31. Determine the fluid level before beginning the OLS troubleshooting. . . . . . . . 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. . . . . iii WARNINGS, CAUTIONS, AND NOTES . . . . . . 118 111. . . . . . Description of the 3000 and 4000 Product Families Allison 4TH Generation Electronic Control system. . . . NOTE: If using a TCM from another vehicle is unavoidable, the TCM MUST BE set to factory values and the vehicle MUST BE driven carefully to adapt the shifts to the test vehicle. . . . . . . . This occurs when the remaining fluid life is approximately 1 percent. . . 3.Thoroughly clean corroded or dirty terminals. . Engine coolant temperature sensor autodetect will countdown for a total of 25 engine starts while recording detections of engine coolant temperature sources. . . . . . . Test drive the vehicle to confirm a DTC or performance complaint. . . . . . . . . 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. . Be sure the transmission model matches the calibration in the TCM. . . . . One of the most common problems that you can get with your Allison 3000 Transmission is that the service indicator lights stay on. . Also, many different styles and materials for harnesses are likely to be encountered. 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. . . Throttle autodetect will increment a counter for a throttle source on each engine start during which the possible throttle source is detected. 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). . . . That range will be shown on the shift selector display. . . . . Make sure all connectors are tightly connected and. . . . . Disconnecting and reconnecting the TCM can often correct faulty wiring harness connections that may have been present. If the gears do not mesh at installation, the wrong PTO has been installed." Don't assume that a PTO intended for a specific purpose will suffice for another. . . . . . . . Determine if DTCs have set by: Using the shift selector display (see Paragraph. Some OEMs may provide their own equivalent for the VIM which performs the same functions as the VIM shown in Figure 112. . . . . . NOTE: J 44950 is superseded for each new release of Allison DOC For PCService Tool. . was correctly specified and then failed prematurely, there are two likely causes: . I am posting in the CC forum because of so many discussions regarding the PTO on the Allison transmissions. Three speed sensorsengine speed, turbine speed, and output speedprovide information to the TCM. Refer to Appendix A if a circuit problem is suspected. . . . . . . . . . . . Refer to Section 6. . . . Check phasing, angularity, and slip movement of driveshaft. . Allison DOC For PCService Tool shows PS2 EXHAUSTED. . . . . (3)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. . . . . . . The lube filter must be changed with the main filter. . . . . The code display procedure will indicate the number of times the DTC has occurred. . Transmission Fluid The hard shifting problem is often linked with low transmission fluid levels. It depends on the transmission and PTO. . . . . Operation may or may not be restricted. Not available with (PTO) Power take-off. shorted-to-ground. . Typical 4th Generation Electronic Controls External Wiring Harnesses. . . . . . . . . clutches are applied to lock the transmission output. Locate and repair the damaged portion of the wire. . . . Chelsea PTO and Pumps For All Allison Transmission Models. . . . Clear any DTCs that may be present and test drive the vehicle to confirm the repair. . . . . . . . . . Condition Likely Cause Correction . . . . . . . . . . . . . . . . . . . Oil Level Sensor (OLS) . . . . . . . . . . . . . 61 62. . Figure 13. . . . . . . . . . Allison Transmission is responsible for warranty on these parts. . . . . . . . . . . . . . . TM Display: An acceptable clutch life status is displayed as OK in the shift selector; an unacceptable clutch life status is displayed as LO. . . . . . . . . . . . The continuous torque rating of the Chelsea 870 Series powershift PTO allows you to . . . . . . . During diagnostic display mode, illumination of the LED indicator shows that the displayed Diagnostic Trouble Code (DTC) is active. The 3000 and 4000 Product Families transmissions configurations can be programmed to have up to six forward ranges, neutral, and one reverse range. . . . How do you run a dump with a stick trans? . . Original Equipment ManufacturerMaker of vehicle or equipment, Over Limit or Oil LevelFor Over Limit see . Illumination of the CHECK TRANS light indicates that a condition was detected that requires service attention. . . . . . . DIAGNOSTIC CODE TROUBLESHOOTING . . . It will be built in-house by General Motors and simply features Allison branding. This opens the PS2 and voltage is sensed on wire 118. Table 33 lists the operating range and pre-determined default range the transmission will shift to in the event of an electrical interruption. . . . Care should be taken when welding on a vehicle equipped with electronic controls. . . . . 73, SECTION 8. . . 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. . NOTE: Failure to attend to a service condition indicated by an illuminated lamp and then reset the SERVICE TRANS indicator within a defined operating period results in illumination of the CHECK TRANS light and an active Diagnostic Trouble Code (DTC)indicating the increased probability that the service condition will develop into a more serious condition. . Allison Transmission PTO Units For All Models. . However, even these revolutionary pieces of equipment can have problems. . . 64 66. . . . . . Source: www . . . . . . . The transmission is considered to be overheated when any of the temperatures in Table 32 are exceeded:. . . . . To shift from forward to reverse, select N (Neutral) and then R (Reverse). . . . enhance vehicle handling. . . More information on both types of shift selectors is continued below. . . . . . Tuning costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require an hour. (2)On the opposite end of the harness, test the continuity of the jumpered pair. . Rebuilt, New and Used Allison transmission Power Take Offs from Parker Chelsea, Muncie and More. . . Find a facility My Transmission . . If engine rating is not compatible, the vehicle must be returned to the OEM for engine recalibration. . . . . . . . . If your implement/pump will fit, it is PTO capable. . . . . . . Engine speed less than 1200 rpm in all ranges except neutral. . 11 12. . . . . . . . . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . Codes related to the CHECK TRANS light are detailed in the diagnostic trouble code chart (refer to Section 6). Reliable transmission operation and performance depend upon a correctly installed transmission. . 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. . . What Might be Wrong with Your Transmission, The Allison transmission 1000 model has a feature called limp mode, in which the transmission locks itself into third gear. 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. . . . . . . . . SCTI provides a technical HELPLINE at 519-627-1673 (Wallaceburg). . . . . . . RESTTING OF TCM PARAMETERS TO SUPPORT ENGINE UPDATE . . . . . . . TESTING AT TRANSMISSION FEEDTHROUGH CONNECTOR FOR INTERNAL, HARNESS OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND . . . . . . . . . . . . . . . . . . . . iv, 11. . . The technician should also have the mechanical aptitude required to connect pressure gauges or transducers to identified pressure ports used in the troubleshooting process. . . . . . 158) all use a 1 for the first digit and the. . Allison 4th Generation Controls consist of the following elements: 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, Control Module (Electro-Hydraulic Valve Body), Optional Engine Coolant Temperature Input. . . . . If the engine temperature gauge indicates a high temperature, the transmission is probably overheated. This pressure forces the valves down to connect the necessary flow passages for clutch engagement. . . . . . . . . Refer to Appendix A if a circuit problem is suspected. . . . When the C5 clutch is exhausted, as in second through sixth ranges, PS1 verifies the position of the C1 and C2 latch valves. . . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . . . . . . Allison 4th Generation Control functions are controlled by the TCM. . We have PTOs for the Allison 1000, 2000, 3000, and 4000 series and more. . . . . . . . . Multiple throttle sources can be detected on a single engine start and multiple confidence flags can be set. . . . . 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. . . . . . . . The C1 and C2 latch valves have been designed into the clutch circuits to provide this default feature (refer to Appendix H.). . ALLISON TRANSMISSION DIAGNOSTIC TOOL. . . Shorts involve. . . . . . . . . . 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. . . . . . . . . . . . . . . We ship from the USA to . . . . . . MGU Transmission, Allison 10-Speed automatic with integrated Power Take-Off (PTO) Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . Program the PCM for PTO function, and it's a done deal. . 8 o'clock position: 1.00 x engine speed. . . . . . . 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. 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). Additional information may be published from time to time in Service Information Letters (SIL) and will be included in future revisions of this and other manuals. . . Sold By: Complete Recycling Group - Heavy Truck Parts. . . anyone need wiring. . . . . . . . . . NOTE: Allison Transmission is providing for service of wiring harnesses and wiring harness components as follows: 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). . . . . . . . The TCM uses a single 80-way connector, which is used to receive input from the following: Many harnesses will include a bulkhead fitting to separate cab and chassis components. . . . . . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. 31 32. . . The SERVICE TRANS indicator illuminates briefly following a reset to acknowledge the reset was successful. . Diagnostic information is obtained by pressing the (Up) and (Down) arrow buttons at the same time. Clean dirty terminals or connectors with isopropyl alcohol and a cotton swab, or a good quality. . . . . . Failure to do so may. If the pto light in the dash cluster ( has to be the one in the cluster) is on , then the VECU should be getting the " PTO on" signal and operate as per the Pto parameters that were programmed in the VECU ( Vechicle control unit) . . Typical Allison 4th Generation Shift Selectors, 14. . . . . . . . . . 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. . Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low. Trying to find out how a pto works on the Allison transmission. . . . . . . . . . . . . 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. . . . . . . If the light does not come on during engine start, request service immediately. . If dirty or corroded terminals are the probable cause of the problems, reconnect the clean connectors and operate the vehicle normally. . . . . . Autodetect takes place within the first 30 seconds of each engine start monitored. Allison DOC For PCService Tool uses a Windows style graphical user interface (GUI) and includes: User selected views of multiple transmission parameters, Active and historical diagnostic trouble codes (DTCs), Graphical instrument panel view of transmission parameters, Code driven links to embedded Allison 4th Generation Control System Troubleshooting Manuals, Reprogramming capability (available after satisfying Allison Transmission training certification requirements), Demo Mode which allows the user to practice the program without being connected to a vehicle, New animated screen by screen help support (found in Help, Video-based training materials, Allison DOC For PCService Tool Training Videos). 58, 57 FLUID RECOMMENDATIONS . . . Table 32. It is normal for the TCM date displayed electronically to be a few days prior to the date shown on the label. . Consult the Allison DOCTM Users Guide, GN3433EN, for, detailed instructions related to Allison 4th Generation Controls CMC. . . . . 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. . . . Autodetect searches for the presence of pressure control solenoid 5 (PCS5) to the retarder during the first 35 engine ignition cycles. Posted January 16, 2019. . . . . . . Output voltage from the TPS is directed to the TCM through the external harness. . . LPS Cleaner is a registered trademark of LPS Laboratories. . . 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. . . . . . . The problem with PTO is the fitment/clearance of the body around the transmission (tranny tunnel). . . The Throttle Position Sensor (TPS) can be mounted to the engine, chassis, or transmission. . . . Refer to the chart in Appendix Q. . . . Location: Logan Indiana (Near Cincinnati Ohio) Posts: 751. . . . Input power, ground, neutral start circuitry, etc., can cause problems with electronic controls or vehicle functioning and may not generate a DTC. Modulated main pressure results in improved cooler flow and reduced pump losses when throttle position and output speed is low. . . . Technicians unsure of making the required tests should ask questions of experienced personnel or find instruction. . . . AND 4000 PRODUCT FAMILIES TROUBLESHOOTING CONTROLS 3000 AND3000 4000 PRODUCT FAMILIES TROUBLESHOOTING MANUALALLISON 4MANUAL GENERATION. ), FOREWARD. . However, there are instances when the . . Allison Transmission Troubleshooting Download ALLISON 1000/2000/24000 SERIES ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL DTC/Description P0121 Pedal Postion Sensor Performance Problem P0122 Pedal Postion Sensor Circuit Low Voltage P0123 Pedal Postion Sensor Circuit High Voltage P0218 Transmission Fluid Over Temperature P0562 System Voltage Low . . . Throttle percentage less than 15 percent in reverse, low (7-speed), first, or second range. . . . . . . 16. . . . . Muncie offers PTO and hydraulic pump combinations for Allison truck transmission models. . . . . . Custom Tuning is not included in the purchase price but is offered seperately at the hourly rate of $50.00/hr. . . . After the OLS circuit is repaired, reset autodetect or manually select the OLS function using the Allison DOC For PCService Tool. . . . . . . . . . . . The tools listed below are available for purchase from SPX/Kent-Moore. . . . . . Copyright 2008 Allison Transmission, Inc. P.O. . . . . . Buy Now. Unfortunately, a driver cant reverse limp mode. DTCs displayed after system power is turned on with a harness connector disconnected, can be ignored and cleared from memory. . . . . . . . . . . . . Dont let a transmission in need of repairs bring your workplace to a halt! . Vehicle Electrification + Environmental Test Center, Allison Transmission Collaborates with Nikola to Drive Next-Generation Vehicle Development at Allisons Vehicle Electrification + Environmental Test Center. Replace trigger Check air pressure. . 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. . . . . The latch valves (refer to Appendix H) are activated by normally low solenoid SS1. TG Series PTO . . Wiggle connectors, harnesses, and splices when looking for opens. . . . . . . . . . . . Also, be aware of other interlocks that would prevent attaining D (Drive) or R (Reverse). . Find an Allison authorized service facility near you. . . . . 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. Contact Us +1 443-914-6010. . 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. . . . . . . . . 5VDC supplied by the TCM. . Topics include Power Take-Off (PTO) operation, shift selectors, prognostics, diagnostics, care and maintenance and even driving tips. . . . . . . . . . . . (2)TCM Reprogramming tab, used to enable the reprogramming capability of the Allison DOC For PCService Tool . . . . . . . . . . . . . . The TCM issues commands to various solenoids in the two valve bodies to govern fluid flow to the clutches (including torque converter clutch). . . The display message indicates the operating status of the transmission main filter, based on the measured pressure drop across the filter. Replace the TCM with a known, good TCM from a similar vehicle. . . . 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. . The rest is in the PCM. . . . drive gear rating (continuous operation) Using one PTO: 930 Nm. . ELECTRONIC FLUID LEVEL CHECK (ALLISON DOC FOR PCSERVICE TOOL) . . Minimum value displayed is 00 percent. . . . . . . . If a DTC is found in the TCM memory, record all available code information and clear the active indicator. . . Allison. . . . . . . . . . Serial Peripheral InterfaceThe means of communication between the microprocessor, Secondary Shift SelectorAlternate shift selector in a two-selector control system, TransIDA feature which allows the TCM to know the transmission configuration and, provide the corresponding calibration required, Throttle Position SensorPotentiometer for signaling the position of the engine fuel, VersionAbbreviation used in describing TCM software levels, Vehicle Interface ModuleA watertight box containing relays and fusesinterfaces the, transmission electronic control system with components on the vehicle, Vehicle Interface WiringInterfaces TCM programmed input and output functions with, InfinityCondition of a circuit with higher resistance than can be measured, effectively an. . . Refer to Section 6. . . . 112 A. . . . . . . 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. . . . Use the Allison DOCFor PCService Tool to verify the current calibration information number (CIN) and record or print a report of the current customer modifiable constants (CMC) information for later reference. . . . . This simulates vehicle movements which occur during actual operation. Multiple sources can be detected on a single engine start cycle. . . . . . . . . . . . This occurs when the remaining clutch life reaches. Some procedures require using specially designed tools. . . . . . . . . . The . . . . . . . . SCTI recognizes Allison Transmission, manufacturers, and SCTI part numbers. . . . . . CONTROL MODULE (Figures 17 and 18). . . When a clutch is applied, clutch feed pressure is routed through the latch valves to the clutch piston. . . . . . . . . . . . . 855 844-SALE | 855 844-7253. . . We make every effort to keep our service information current and accurate. . . Description of the 3000 and 4000 Product Families Allison 4. . . A temperature sensor (thermistor) is located in the internal wiring harness. If the P.T.O. . . . . . . . . . . Once a problem solution is discovered in the manual do not look further for other solutions. TESTING FOR OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND. . .P1 Q. THERMISTOR TROUBLESHOOTING INFORMATION . . . . NOTE: The Filter Life Monitor triggers the SERVICE TRANS icon following a reset if the Filter Life indicator switch reopens. . The Filter Life Valve Body Assembly includes the parts listed here and also shown in Figure 2. . The turbine speed signal is generated by the rotating-clutch housing spline contours. . . . . . Dont keep driving a vehicle with a faulty part! Fax 713.466.9839 . . . . During the entire autodetect period, the software will use the highest priority source as the throttle source if multiple sources are detected before any confidence flags are set. . . 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 . . We can rebuild or repair your Chelsea PTO or Muncie PTO off your Allison Transmission for you if you'd like. . . . . . Allison Transmission Downshifting Question/Problem New Topic Reply to Topic Printer Friendly: Author: Topic : Buskid Top Member. . To shift from reverse to forward, select N (Neutral) and then D (Drive) or other forward range. . . . . Remember that some problems may be temperature related. Each time the engine is started, the CHECK TRANS light illuminates briefly and then goes off. . . The TPS contains a pull actuation cable and a potentiometer. . . . Is your Allison transmission giving you trouble? . . Filter Life Monitor indicates when the filters require changing. . . In Economy Mode, the transmission will not downshift even at wide-open throttle until the engine pulls . . . . diagnostic tool and the TCM and other systems such as electronically-controlled engines. . . COLD CHECK. Engine speed less than 1200 rpm in all ranges except neutral. . . . . . . . Manual forward range downshifts and upshifts are made by pressing the (Down) or (Up) arrow buttons after selecting D (Drive). . 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. . . . . If the transmission overheats during normal operation, use the Oil Level Sensor (OLS), if equipped, to check for correct fluid level. Owning Continue reading Allison Automatic Transmission Wiring . . . . . Use this manual as an aid to troubleshooting the Allison 4th Generation Controls. (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. . Remember to do the following when testing for shorts and opens: Minimize movement of wiring harnesses when looking for shorts. . . . . . . . . . . . . SCTI provides a technical HELPLINE at. . . . . . March 2012. . If you find yourself stuck in third gear with this model of transmission, its probably time to, Allison transmissions built in the mid-2000s had a recall issued for their TCM module. . . ABBREVIATIONS . . . . . . ALLISON TRANSMISSION DIAGNOSTIC TOOL, 3-4. . Dont keep driving a vehicle with a faulty part! . . . . . Zip Class A CDL Experience Please select ALL of your current, valid driver's licenses CDL A CDL B CDL C . . . . Learn how you can ensure the performance and durability of your Allison transmission. Foreign Material . Hence, the solenoids are referred to as pressure control solenoids (PCS). . . . . . 43, 51. . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . . . . . . . . . . . . . . . . Refer to the troubleshooting chart for the possible cause(s) of the problem. 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). . . . . . . . . . 27, 31. There are three full-function pushbutton shift selectors and a strip pushbutton shift selector. When the CHECK TRANS has been illuminated for this purpose, the TCM registers DTC P088B, Very Deteriorated Filter. 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). If the complaint is confirmed. . . . . . 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. . . . . . . . . Contact your Allison Transmission represen-tative if you do not have access to the Allison Transmission Extranet. . . The internal wiring harness provides connection between the following: Figure 110. A list of all documents refer-enced in this document can be found at the end of this document. . . . . . . Loctite is a registered trademark of the Loctite Corporation. . TroubleshooTing guide. . . . . . . Give us a call at 877-776-4600 or 407-872-1901. . . . . . . . Allison DOC For PCService Tool displays clutch condition as OK or NOT OK for each clutch, C1 through C5. . . If display is flashing, shift is inhibited. . . . . . . . . . . . NOTE: Turn off the vehicle HIGH IDLE switch, if present, before shifting from N (Neutral) to D (Drive). . . . . . . . . . . . . . GENERAL TROUBLESHOOTING OF PERFORMANCE COMPLAINTS, A. . 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). . . . 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. OIL LEVEL SENSOR (OLS) INTRODUCTION . If high temperature in either the engine or transmission persists, stop the engine and have the overheating condition investigated by maintenance personnel. . NOTE: Most engine upgrades are same type/rating; under normal circumstances there should be no reason to reset the TCM Autoselect. The OLS senses transmission fluid level by electronically measuring the buoyancy forces on the float. . RESETTING A TCM PARAMETERS TO SUPPORT ENGINE UPDATE, 3-9. . . . Most troubleshooting tests consist of determining resistance, continuity, and testing for shorts between wires and to ground.

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