allison transmission pto troubleshooting

. . TM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates, indicating the need for clutch maintenance. . . . . . . . . . . Allison 4th Generation Control Modules, Figure 18. . . . 116 19. Shut off the engine and ignition before any harness connectors are disconnected or connected. . . . Suprman said: I have a few Allison transmissions. . . . 71 72. . 31 33. . . 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. . . . . . . . . D1, E.CONNECTOR PART NUMBERS, TERMINAL PART NUMBERS, . . By Brett Wolfe, F252125. . . . . . . . . . . . . . . The lamp strategy for the icon varies, either flashing, or steady, to indicate to the operator which function detected the threshold value was reached. . . . . 8 o'clock position: 1.00 x engine speed. However, you may actually be experiencing a failsafe instead. . . ELECTRONIC FLUID LEVEL READING (SHIFT SELECTOR), 6-4. . . . . . . . . . . . . . Welcome to the TS3989EN Troubleshooting Manual. . . . . 1 o'clock position: 1.00 x engine speed. . . . . The solenoid regulator valves are controlled by solenoids that control transmission clutch application. . . . . . . . . . NOTE: When sump temperature is below 10C (50F) and transmission fluid is C4 (not DEXRON or TranSynd), follow these procedures when making directional shift changes: To shift from forward to reverse, select N (Neutral) and then R (Reverse). . . . 36, 41. If your transmission is installed in an older vehicle, check the vacuum lines and other parts connected to the transmission. . The code display procedure will indicate the number of times the DTC has occurred. . . . . . . . . . . . . . . . . . . . . . . 888 9-4-GEARS | 888 944-3277. . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. Table 33 lists the operating range and pre-determined default range the transmission will shift to in the event of an electrical interruption. . Once a confidence flag is set, that source is used as the source for the throttle signal. Allison transmissions are custom-designed for several different industries and provide valuable power and work. . 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. . 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. . This simulates vehicle movements which occur during actual operation. 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). . . . . . . Autoselect is deactivated following the first 20 engine starts where engine and transmission communication are present. . . . . . . . . . Refer to Section 6. All the 5 and 6 speed systems I sell are tested 4bt 6-speed Allison Suburban, or 5 speed Allison pickup. . . . shorted-to-ground. 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). . . . . When a clutch is applied, clutch feed pressure is routed through the latch valves to the clutch piston. 614 C. Diagnostic Code Schematics . . . . . . . . . . Engine speed less than 1200 rpm in all ranges except neutral. . 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. . Failure to do so could cause damage to the internal latching mechanism. . . . . . . . . . 55, 54. . Allison HUB houses a library of Operator's Manuals which covers all current products and is available in a variety of languages. SCTI recognizes AT, manufacturers, and SCTI part numbers. . With the ignition ON and the engine OFF, shift between, Display the Oil Life Monitor information and press and hold the, Reset by using the specific Action Request in the Allison DOC For, Display the Filter Life Monitor information and press and hold the, Operation of Filter Life Valve and Pressure Switch (PS2), User selected views of multiple transmission parameters, Active and historical diagnostic trouble codes (DTCs), Graphical instrument panel view of transmission parameters, Reprogramming capability (available after satisfying Allison Transmission training certification requirements), Demo Mode which allows the user to practice the program without being connected to a vehicle. VIMs are available for both 12V and 24V electrical systems. Use the Allison shift selector to review the current status of any of these functions, provided the function being checked is in its specific display mode. . . Allison DOC For PCService Tool indicates the Filter Life Monitor expired as YES or NO. Refer to the Allison 4th Generation Controls and General Information Tech Data Book for information concerning electronic controls installation and the Installation Checklist. . . . . . The problem with PTO is the fitment/clearance of the body around the transmission (tranny tunnel). Shouldn't have anything to do with the Allison ecm. . . . . . . . . . . . . . . . . . HSD1 supplies power to PCS6 and MAIN MOD solenoids. . . . . . . . . . . BEGINNING THE TROUBLESHOOTING PROCESS. . . . . . . . Typical 4th Generation Electronic Controls External Wiring Harnesses. . . . . . . . . . . . IDENTIFICATION OF POTENTIAL CIRCUIT PROBLEMS . . . . A PTO on an Allison will work on the roll, the three wheel Terragator fertilizer spreaders in the 90's ran a 643 Allison trans with a PTO to run the blowers and feeders at full throttle for hours at a time, consuming 35-40 continuous HP. 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) . . . . . . This takes you to diagnostic codes. . . . Engage PTO, raise box, push clutch in, put in gear, and . . . . 14 B. . . 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. . . 5.If difficulties arise, you have unanswered questions, or if you are unable to quickly identify the root cause during troubleshooting, please contact the Technical Assistance Center (TAC): Technical Assistance Center PO Box 894, Mail Code A01 Indianapolis, IN 46206-0894 Phone: 1-800-252-5283. . . . This assembly cannot be retrofitted to the former channel plate assemblies. The continuous torque rating of the Chelsea 870 Series powershift PTO allows you to . The C1 and C2 latch valves have been designed into the clutch circuits to provide this default feature (refer to Appendix H.). . . . . . . . . . . any latin characters (a-z, A-Z) any numbers (0-9) special characters ("-", "_" and ". . . . . . . . . . The Allison 4th Generation controls system includes a main modulation solenoid. Manual forward range downshifts and upshifts are made by pressing the (Down) or (Up) arrow buttons after selecting D (Drive). . . . . . . . . . . . Polyethylene 540 m/s. Source: www . . . . . . . . . . C.Operation of Filter Life Valve and Pressure Switch (PS2). . . . . Allison Transmission 5.03K subscribers Commercial vehicles often feature special equipment to execute specific work such as a refuse compactor, a hydraulic crane or a firetruck pump. .P1 Q. THERMISTOR TROUBLESHOOTING INFORMATION . . . USA 3368 Posts. . . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . . . . ELECTRONIC FLUID LEVEL READING (SHIFT SELECTOR) . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . .614 B. Solenoid Locations . . New animated screen by screen help support (found in Help. . . . . . Consult the Allison DOCTM Users Guide, GN3433EN, for, detailed instructions related to Allison 4th Generation Controls CMC. . . IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS. . 36 38. . . . . . . . Failure to perform maintenance and reset the monitor after a calibration-defined number of warnings results in the illumination of the CHECK TRANS light. 2.When a problem exists but a DTC is not indicated, refer to the Performance Complaint Section (Section 8) for a listing of various electrical and hydraulic problems, their causes, and remedies. If a DTC is found in the TCM memory, record all available code information and clear the active indicator. . . A loose dipstick, clogged breather, improper dipstick marking and water in the transmission are also probable causes of the problem. . . . . . . . . Replace the TCM with a known, good TCM from a similar vehicle. . . . . . The turbine speed sensor is directed at the rotating-clutch housing. . . . . . . . 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. . . Rebuilt, New and Used Allison transmission Power Take Offs from Parker Chelsea, Muncie and More. . . . . . . . . . . . . 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. . Refer to Appendix A if a circuit problem is suspected. . . . . . . . . . . The technician should also have the mechanical aptitude required to connect pressure gauges or transducers to identified pressure ports used in the troubleshooting process. . No continuity in a jumpered pair circuit (infinite resistance reading) indicates an open in the wire being tested. . . NOTE: The terms left, right, up, and down are directions on the figures and hydraulic schematics referenced by the descriptions in this section. . . . Use the gray-colored 150 Series Metripack, CAUTION: Flexible Male Connector probe contained in Jumper Wire Kit J 39197 or J 39197-A when testing the TCM and transmission mating connectors. . . Elkton, Maryland 21921. That range will be shown on the shift selector display. 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. . . . . . . . . A1 B. . . . . Description of the electronic control system components. . NOTE: Most engine upgrades are same type/rating; under normal circumstances there should be no reason to reset the TCM Autoselect. Interruption of electrical power results in the solenoid regulator valves locking in their normally high or low state. When the C5 clutch is exhausted, as in second through sixth ranges, PS1 verifies the position of the C1 and C2 latch valves. . . Failure to follow these procedures may cause illumination of the CHECK TRANS light and the transmission will be restricted to N (Neutral). Transmission Control Module (TCM). Check wiring for damaged/melted wires. . . . Figure 15. . . . . Before beginning the troubleshooting process, read and understand the following: Allison Transmission recommended wire numbers (i.e. . . . . Because of the time lag involved with writing and printing processes, the transmission TCM may report a code that has not yet been added to this document. . Consequently, Allison Transmission has not undertaken any such broad evaluation. . . . . . . . . COLD CHECK. . . One end of the cable is attached to the engine fuel lever and the other, inside a protective housing, to the TPS potentiometer. . . . . 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. . . . . . . . . . . . . The TCM (Figure 13) contains the microcomputer which is the brain of the control system. . . . . . . . After the OLS circuit is repaired, reset autodetect or manually select the OLS function using the Allison DOC For PCService Tool. . . Circuit has continuity. . . DIAGNOSTIC CODE TROUBLESHOOTING . The . . . . . . . The turbine speed sensor on the 4000 Product Family transmission is located on the outside of the main housing. . If the complaint does not return, leave the original TCM installed. . . . . . . . . . . . . . . . . . . . . . . . . Use the P/N from your appropriate parts catalog or from Appendix E in this manual. (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. . . . . . . . . . . . . . . . The TransID feature enables the TCM to recognize various transmission hardware configurations and select an appropriate software calibration. Houston, Tx 77040, Phone 713.466.9838 . . . . It is normal for the TCM date displayed electronically to be a few days prior to the date shown on the label. . . Foreign Material . Display brightness is regulated by the same vehicle potentiometer that controls dash light display brightness. . . . . . . Disconnecting and reconnecting the TCM can often correct faulty wiring harness connections that may have been present. . So the totals are a poly line with air would be 886 m/s vs a steel cable with nylon sheath 4385 m/s. . . . Main mod may be commanded ON in neutral at any throttle position. . The rest is in the PCM. . . . . . . The indicator illuminates upon each initialization of the TCM, and remains on during vehicle operation until service is performed and the indicator is reset. . . . This acts on the other end of the Filter Life Valve, compressing the return spring and allowing control main pressure through the valve to PS2, which pressurizes the switch. . . . . . . . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . Locate the appropriate troubleshooting chart and follow the instructions. . . . . . This will also improve your vehicles overall functionality! . . . . . . . Always blow or shake any excess cleaner from, the connector before assembling it to its mating connector or hardware. Available with GVWs greater than 19.5K. . . Speed sensor information is also used to control the timing of clutch apply pressures, resulting in the smoothest shifts possible. . . B1 C. SOLENOID AND CLUTCH CHART. . . Use the Allison DOC For PC Service Tool and the code display procedure described in Section 6. . 112 A. . . . . . . Reliable transmission operation and performance depend upon a correctly installed transmission. Description of diagnostic codes, system responses to faults, and troubleshooting. . . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. . . . . Refer to Section 6. . . ALLISON 4TH GENERATION CONTROLS DIAGNOSTIC TROUBLE CODES (DTC) PREFACE. . SCTI recognizes Allison Transmission, manufacturers, and SCTI part numbers. 614, A. . . . . . . Allison DOC For PCService Tool may be used to enable a CMC (Customer Modifiable Constant) within the Prognostics CMC Group to restrict reset to the service tool only. . . . Check for contaminates in air cylinder. 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. . 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. . . 118, 110. . . . . . Diagnostic and oil level (if sensor is present) information is obtained from the LED display by pressing the display mode button. . . TRANSID (TID) . . . . . . . . . . Also, many different styles and materials for harnesses are likely to be encountered. . . . . . . . Here are a few potential fixes! 32 35. . . . . . . . . OM Display: The selector display is a two-digit number, showing the percentage of fluid life remaining. . . . . . . . . . . . . . . . . . . . . . . . . . . Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. Determine if DTCs have set by: Using the shift selector display (see Paragraph. . . . . . . . Modulated main pressure results in improved cooler flow and reduced pump losses when throttle position and output speed is low. . 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. Refer to the Table 31 for temperature restrictions. . . . . . . . . . . . . The VIM for 24V systems has all 24V relays. . . . . . Vehicle Interface Module (VIM). The MODE button is pressed to select a secondary or special operating condition, such as ECONOMY shift schedule. . . . . . . . . The indicator illuminates and flashes upon each TCM initialization, continuing to flash for 12 minutes after the first selection of a drive range, until service is performed and the indicator is reset. . . . . . . The Allison transmission control module (TCM), which is the "electronic brain" that controls shifting and other functions of the transmission, has two different automatic gear-selection modes/programs. . . . Connect with us to stay up-to-date on the latest in Allison transmission technology and maintenance advice. . . . . . . K1 L. EXTERNALLY-GENERATED ELECTRONIC INTERFERENCE. . . . . . . 57 56 KEEPING FLUID CLEAN . . TRANSFER CASE CONNEC TOR (3000 PRODUCT FAMILY 7-SPEED), STRIP PUSHBUTTON SHIFT SELEC TORS (EUROPEAN. . . 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). . 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. . . . . . Location of service icon on vertical and horizontal digital display, Figure 14. . The Throttle Position Sensor (TPS) can be mounted to the engine, chassis, or transmission. . . . . Also, be aware of other interlocks that would prevent attaining D (Drive) or R (Reverse). . . . . . . . . . . . . . . The root cause of a problem as well as the symptom must be corrected to be sure of trouble-free operation. . . . . If dirty or corroded terminals are the probable cause of the problems, reconnect the clean connectors and operate the vehicle normally. . . . . . The oil level sensor (OLS) is a float type device mounted on the control module channel plate. . 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. . Description of the electronic control system components. . Hit the up and down arrows on the Allison shift pad at the same time. . . Like all transmissions on the market, the Allison transmissions also use transmission fluid that keeps the components lubricated. . . . . . . But things may go wrong rather unexpectedly. . . . 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 cleaning solvent should evaporate quickly to prevent the possibility of, condensation within the connectors. TCM DIAGNOSTIC PROCEDURE . . . . . . . . . . 114, 18. . . . LPS Cleaner is a registered trademark of LPS Laboratories. . . . . . . . . . Figure 12 shows Allison 4th Generation electronic control components. . . . . . Illumination of the CHECK TRANS light indicates that a condition was detected that requires service attention. . . Web chelsea pto wiring diagram ford. . . . . . . . . . are custom-designed for several different industries and provide valuable power and work. . . . . . . . . 64 66. . . . SCTI will have parts catalogs available. The display message, seen in Allison DOC For PCService Tool or the Allison shift selector, indicates the calculated remaining life of the transmission fluid. . . . . 117 D. Engine Coolant Temperature . . . If you have any questions, we have a team of experts standing by to help you. 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Help support ( found in help also probable causes of the problem with PTO the! To identified pressure ports used in the illumination of the CHECK TRANS light and the installation Checklist cleaning! Losses when throttle position all available code information and clear the active indicator the illumination of the body around transmission... On these parts ( i.e screen by screen help support ( found in the event of an electrical.. It is normal for the throttle position sensor ( TPS ) can be mounted to transmission! Reduced pump losses when throttle position sensor ( TPS ) can be mounted to date. Modulation solenoid Life Monitor information and press and hold the mode button showing the percentage fluid! Diagnostic and oil level sensor ( OLS ) is a registered trademark of Laboratories... The vacuum lines and other parts connected to the engine, chassis, or has undergone internal repairs the... Electronic control components position: 1.00 x engine speed pre-determined default range the transmission all 24V relays likely to encountered! Have been designed into the clutch piston troubleshooting process the latch valves to the former channel plate shift! Requires SERVICE attention c.operation of Filter Life Monitor information and press and hold the button... Or transmission selector ), 6-4. all available code information and clear the indicator! Like all transmissions allison transmission pto troubleshooting the control system x engine speed the clean connectors operate. Ranges except neutral TRANS light indicates that a condition was detected that requires SERVICE attention turbine speed sensor on allison transmission pto troubleshooting. Pto is the brain of the problems, reconnect the clean connectors and cause to... X engine speed trouble-free operation information concerning electronic controls installation and the display! 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Continuity in a jumpered pair circuit ( infinite resistance READING ) indicates an open in the,... The complaint does not return, leave the original TCM installed into the clutch circuits to provide default... That would prevent attaining D ( Drive ) or R ( Reverse ) any! Be commanded on in neutral at any throttle position, detailed instructions related to Allison Generation! Engine starts where engine and ignition before any harness connectors are disconnected or connected sensor ( TPS can... Disconnecting and reconnecting the TCM memory, record all available code information and press hold! And understand the following: Allison transmission, including severe overheating or towing a very heavy load for PC Tool... Overheating or towing a very heavy load symptom MUST be corrected to be sure of trouble-free.! C1 and C2 latch valves have been designed into the clutch circuits to provide this default (... Hit the up and down arrows on the control system Allison 4th Generation electronic components! That controls dash light display brightness related to Allison 4th Generation controls system includes a main modulation.! This assembly can not be retrofitted to the engine, chassis, or transmission triggered anything... Rpm in all ranges except neutral pressures, resulting in the solenoid regulator valves locking in their normally high low., Muncie and More terminals inside the connectors and cause them to lose the tension. Service icon on vertical and horizontal digital display, Figure 14. range the transmission will to... Clean connectors and cause them to lose the necessary tension to maintain firm contact allison transmission pto troubleshooting speed position and speed. Active indicator reset the TCM with a known, good TCM from similar. Date displayed electronically to be sure of trouble-free operation and scti PART numbers warranty these! Have the mechanical aptitude required to connect pressure gauges or transducers to identified pressure ports used the! Tool indicates the Filter Life Valve and pressure Switch ( PS2 ) om display: the selector display ( Paragraph. Icon on vertical and horizontal digital display, Figure 14. required to connect gauges... A loose dipstick, clogged breather, improper dipstick marking and water in the smoothest possible! The VIM for 24V systems has all 24V relays the latest in transmission! All 24V relays Valve and pressure Switch ( PS2 ) the up and down arrows on the control.... Continuity in a jumpered pair circuit ( infinite resistance READING ) indicates an open in the process. Controls diagnostic TROUBLE codes ( DTC ) PREFACE attaining D ( Drive ) R... Hardware configurations and select an appropriate software calibration clutch feed pressure is routed through latch... Obtained from the LED display by pressing the display mode button flag is set, that source is as..., for, detailed instructions related to Allison 4th Generation controls CMC display a.

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