. . . . . . . . . . . . Location. 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. . For example, Code P0960, indicates an open in the pressure control solenoid circuit, wires 111 and 174. a. . . . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . . However, you may actually be experiencing a failsafe instead. . . When C5 clutch is applied, C5 pressure acts on the bottom of the C2 latch valve and keeps it in the up position. . . . . . . . . . . 32 34. . . 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. . NVL is, attained by turning D solenoid ON (in addition to E solenoid) and the C4 and C5. . Allison Transmission Downshifting Question/Problem New Topic Reply to Topic Printer Friendly: Author: Topic : Buskid Top Member. . . . . Working underneath the truck while it was still running, a protruding set screw on the PTO drive shaft caught the collar of his coveralls and quickly entangled him. . . . . . . . . Replace air valve. 117 B. . SCTI provides parts to any Allison customer or OEM and is responsible for warranty on these parts. (Used) 2002 ALLISON TRANSMISSION ASSEMBLY- Model: AT545, Serial Number: 3211129807, Engine:Cummins ISB, For more information about this item, give us a call. 56 A. . . . . When a clutch is applied, clutch feed pressure is routed through the latch valves to the clutch piston. . . . . Find the technical information and factory resources for your Allison transmission. Allison 4th Generation Control Mudules with Prognostics. . . . . . . . . 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) . . . . . . Figure 21. . . . . . . . The SERVICE TRANS indicator illuminates briefly following a reset to acknowledge the reset was successful. . . . . . . . . . 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. To service Allison 4th Generation Controls, the technician must understand basic electrical concepts. . 1.Begin troubleshooting by determining the transmission fluid level and TCM input voltage. . . . . 888 9-4-GEARS | 888 944-3277. . ), FOREWARD. The transmission is considered to be overheated when any of the temperatures in Table 32 are exceeded:. Service Manuals SM4013EN and SM4014EN, plus Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual. . . . . . . . . . Replace trigger Check air pressure. . . . . . . . . SCTI will have parts catalogs available. . . . . . . . . Weak trimmer valves and leaking forward clutch seals may cause excessive engine flares. . 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. . Determine if DTCs have set by: Using the shift selector display (see Paragraph. . . . Cold Check Procedure . . The PTO input to the TCM indicates the PTO is OFF. . . . . . . They were intended for Oshkosh Hemtt use. . Do not insert test probes larger than 0.81 mm into the TCM 80-way and transmission 20-way connectors. They have a 24 bolt bell housing with approx 21 inch diameter pattern. . . . . . . . . . . . . . . . This date is commonly used to denote the change configuration level of the TCM. . TranSyndTM is a trademark of Castrol Ltd. . . . . Engine speed less than 1200 rpm in all ranges except neutral. . . PTO Neutral Lockup. . . . . . . The display message indicates the operating status of the transmission main filter, based on the measured pressure drop across the filter. External Wiring Harness. Shorts involve wire-to-wire or wire-to-ground contacts and moving the harnesses may eliminate the problem. . . . . . . . . . . . . . . . . . . . . . Failure to follow these procedures may cause illumination of the CHECK TRANS light and the transmission will be restricted to N (Neutral). . . . . . . Repair parts for the external harnesses and external harness components must be obtained from St. Clair Technologies Inc. (SCTI). . . Allison HT740 shift problem Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts. . . . . . DIAGNOSTIC TROUBLE CODE TROUBLESHOOTING, DTC C1312 Retarder Request Sensor Failed Low, DTC C1313 Retarder Request Sensor Failed High, DTC P0122 Pedal Position Sensor Low Voltage, DTC P0123 Pedal Position Sensor High Voltage, DTC P0218 Transmission Fluid Over-Temperature, DTC P0610 TCM Vehicle Options (TransID) Error, DTC P0634 TCM Internal Temperature Too High, DTC P063E Auto Configuration Throttle Input Not Present, DTC P063F Auto Configuration Engine Coolant Temp Input Not Present, DTC P0657 Actuator Supply Voltage 1 (HSD1) Open, DTC P0658 Actuator Supply Voltage 1 (HSD1) Low, DTC P0659 Actuator Supply Voltage 1 (HSD1) High, DTC P0702 Transmission Control System Electrical (TransID), DTC P0703 Brake Switch Circuit Malfunction, DTC P0708 Transmission Range Sensor Circuit High Input, DTC P0711 Transmission Fluid Temperature Sensor Circuit Performance, DTC P0712 Transmission Fluid Temperature Sensor Circuit Low Input, DTC P0713 Transmission Fluid Temperature Sensor Circuit High Input, DTC P0716 Turbine Speed Sensor Circuit Performance, DTC P0717 Turbine Speed Sensor Circuit No Signal, DTC P0721 Output Speed Sensor Circuit Performance, DTC P0722 Output Speed Sensor Circuit No Signal, DTC P0726 Engine Speed Sensor Circuit Performance, DTC P0727 Engine Speed Sensor Circuit No Signal, DTC P0741 Torque Converter Clutch System Stuck Off, DTC P0752 Shift Solenoid 1 (SS1) Valve Performance-Stuck On, DTC P0776 Pressure Control Solenoid 2 Stuck Off, DTC P0777 Pressure Control Solenoid 2 Stuck On, DTC P0796 Pressure Control Solenoid 3 Stuck Off, DTC P0797 Pressure Control Solenoid 3 Stuck On, DTC P0842 Transmission Pressure Switch 1 Circuit Low, DTC P0843 Transmission Pressure Switch 1 Circuit High, DTC P0847 Pressure Switch 2 (PS2) Circuit Low, DTC P0848 Pressure Switch 2 (PS2) Circuit High, DTC P0881 TCM Power Input Signal Performance, DTC P088A Transmission Fluid Filter Deteriorated, DTC P088B Transmission Fluid Filter Very Deteriorated (Expired), DTC P0894 Transmission Component Slipping, DTC P0897 Transmission Fluid Deteriorated, DTC P0960 Pressure Control Solenoid Main Mod Control Circuit Open, DTC P0962 Pressure Control Solenoid Main Mod Control Circuit Low, DTC P0963 Pressure Control Solenoid Main Mod Control Circuit High, DTC P0964 Pressure Control Solenoid 2 (PCS2) Control Circuit Open, DTC P0966 Pressure Control Solenoid 2 (PCS2) Control Circuit Low, DTC P0967 Pressure Control Solenoid 2 (PCS2) Control Circuit High, DTC P0968 Pressure Control Solenoid 3 (PCS3) Control Circuit Open, DTC P0970 Pressure Control Solenoid 3 (PCS3) Control Circuit Low, DTC P0971 Pressure Control Solenoid 3 (PCS3) Control Circuit High, DTC P0973 Shift Solenoid 1 (SS1) Control Circuit Low, DTC P0974 Shift Solenoid 1 (SS1) Control Circuit High, DTC P0975 Shift Solenoid 2 (SS2) Control Circuit Open, DTC P0976 Shift Solenoid 2 (SS2) Control Circuit Low, DTC P0977 Shift Solenoid 2 (SS2) Control Circuit High, DTC P0989 Retarder Pressure Sensor Failed Low, DTC P0990 Retarder Pressure Sensor Failed High, DTC P1891 Throttle Position Sensor PWM Signal Low Input, DTC P1892 Throttle Position Sensor PWM Signal High Input, DTC P2184 Engine Coolant Temperature Sensor Circuit Low Input, DTC P2185 Engine Coolant Temperature Sensor Circuit High Input, DTC P2637 Torque Management Feedback Signal (SEM), DTC P2641 Torque Management Feedback Signal (LRTP), DTC P2669 Actuator Supply Voltage 2 (HSD2) Open, DTC P2670 Actuator Supply Voltage 2 (HSD2) Low, DTC P2671 Actuator Supply Voltage 2 (HSD2) High, DTC P2684 Actuator Supply Voltage 3 (HSD3) Open, DTC P2685 Actuator Supply Voltage 3 (HSD 3) Low, DTC P2686 Actuator Supply Voltage 3 (HSD3) High, DTC P2714 Pressure Control Solenoid 4 (PCS4) Stuck Off, DTC P2715 Pressure Control Solenoid 4 (PCS4) Stuck On, DTC P2718 Pressure Control Solenoid 4 (PCS4) Control Circuit Open, DTC P2720 Pressure Control Solenoid 4 (PCS4) Control Circuit Low, DTC P2721 Pressure Control Solenoid 4 (PCS4) Control Circuit High, DTC P2723 Pressure Control Solenoid 1 (PCS1) Stuck Off, DTC P2724 Pressure Control Solenoid 1 (PCS1) Stuck On, DTC P2727 Pressure Control Solenoid 1 (PCS1) Control Circuit Open, DTC P2729 Pressure Control Solenoid 1 (PCS1) Control Circuit Low, DTC P2730 Pressure Control Solenoid 1 (PCS1) Control Circuit High, DTC P2736 Pressure Control Solenoid 5 (PCS5) Control Circuit Open, DTC P2738 Pressure Control Solenoid 5 (PCS5) Control Circuit Low, DTC P2739 Pressure Control Solenoid 5 (PCS5) Control Circuit High, DTC P2789 Clutch Adaptive Learning at Limit, DTC P2808 Pressure Control Solenoid 6 (PCS6) Stuck Off, DTC P2809 Pressure Control Solenoid 6 (PCS6) Stuck On, DTC P2812 Pressure Control Solenoid 6 (PCS6) Control Circuit Open, DTC P2814 Pressure Control Solenoid 6 (PCS6) Control Circuit Low, DTC P2815 Pressure Control Solenoid 6 (PCS6) Control Circuit High, DTC U0001 Hi Speed CAN Bus Reset Counter Overrun (IESCAN), DTC U0100 Lost Communication with ECM/PCM (J1587), DTC U0103 Lost Communication With Gear Shift Module (Shift Selector) 1, DTC U0115 Lost Communication With ECM/PCM (CAN), DTC U0291 Lost Communication With Gear Shift Module (Shift Selector) 2, DTC U0304 Software Incompatible with Gear Shift Control Module 1, DTC U0333 Software Incompatible with Gear Shift Control Module 1, DTC U0404 Software Incompatible with Gear Shift Control Module 1, DTC U0442 Invalid Data Received from ECM/PCM B (CAN1/J1939), DTC U0592 Software Incompatible with Gear Shift Control Module 1. . A1 B. . . Filter Life Monitor indicates when the filters require changing. . . . . . . . . 43, 51. Because of the time lag involved with writing and printing . . . CONTROL MODULE. Circuit has continuity. . . . .E1, TOOL PART NUMBERS, AND REPAIR INSTRUCTIONS, F. THROTTLE POSITION SENSOR ADJUSTMENT . This occurs when the remaining fluid life is approximately 1 percent. . The following trademarks are the property of the companies indicated: Allison DOCTM is a trademark of General Motors Corporation. . . Whenever a TID level change is to be made, the new TID level calibration will be added to the PROM Calibration Configurator System (PCCS) before the change (s) is (are) made in production to the transmissions. . . Table 31. 56, 55 HOT CHECK . 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. Mild Steel 3235 m/s. IT IS YOUR RESPONSIBILITY to be completely familiar with the warnings and cautions used in this manual. . . . . . Even if the vehicle is moving. . . . Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. Posted January 16, 2019. . Failure to perform maintenance and reset the SERVICE TRANS indicator within a specified period results in the illumination of the CHECK TRANS light and DTC P0897, Transmission Fluid Deteriorated, being set. . . install a new TCM. . . . . . . . enhance vehicle handling. Allison DOC For PCService Tool may be used to enable a Customer Modifiable Constant (CMC) within the Prognostics CMC Group to restrict reset to the service tool only. All shift selectors except the strip-type pushbutton have a dual digit vacuum fluorescent (VF) display and a mode indicator (LED). . A complete wiring schematic is shown in Appendix J. . 58 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Allison PTO: Transmission Power Takeoff, Hydraulic Pump and Repair. . . . . . . If the complaint does not return, leave the original TCM installed. . . . . . . The microcomputer is an independent controller and is referred to as a Transmission Control Module (TCM). . Operation may or may not be restricted. The lamp strategy for the icon varies, either flashing, or steady, to indicate to the operator which function detected the threshold value was reached. . DIAGNOSTIC CODE LIST AND DESCRIPTION . . . 119, 21. . . . . The lube filter must be changed with the main filter. . IDENTIFICATION OF POTENTIAL CIRCUIT PROBLEMS . . . . Verify a new engine rating by checking the engine data tag. . . . Fax 713.466.9839 . . DEXRON is a registered trademark of General Motors Corporation. . . . . . Each time the engine is started, the CHECK TRANS light illuminates briefly and then goes off. . . . Description of the electronic control system components. . . . . . . . . . . . . . When the . . We ship from the USA to . . . An Over View on Allison Automatic Transmission Wiring We didn't experience the New World Transmissions from Allison until 1995. NOTE: The Filter Life Monitor triggers the SERVICE TRANS icon following a reset if the Filter Life indicator switch reopens. . . The PTO input to the TCM indicates the PTO is OFF. . . . . . . If the problem recurs, proceed with Step (4). 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. . 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. . Control System Prognostics Operation and Display. . If during the first 20 starts the TCM recognizes an engine to be on its list of certified engines, it will lock to the SEM active state. . Allison DOC For PCService Tool displays clutch condition as OK or NOT OK for each clutch, C1 through C5. Allison DOC For PCService Tool shows PS2 PRESSURIZED. . . . . . . . . Allison 4th Generation Internal Wiring Harness, Figure 111. . If you find yourself stuck in third gear with this model of transmission, its probably time to have it rebuilt. . . OM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates when transmission fluid needs to be changed. . The WARNINGS, CAUTIONS, and NOTES in this manual apply only to the Allison transmission and not to other vehicle systems which may interact with the transmission. . . . There are no restrictions on engine speed in neutral. Shift Energy Management (SEM) Autoselect feature may be used on certain transmissions. . . . Throttle Position Sensor (Without Mounting Brackets). . . 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. . . . . . . . . Locate the appropriate troubleshooting chart and follow the instructions. . . . 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. 21 22. . . Check phasing, angularity, and slip movement of driveshaft. . . . . . . Determine the fluid level before beginning the OLS troubleshooting. . . . . Interruption of electrical power results in the solenoid regulator valves locking in their normally high or low state. . . Refer to Section 6, Diagnostic Trouble Codes, for the code clearing procedure. . . So the totals are a poly line with air would be 886 m/s vs a steel cable with nylon sheath 4385 m/s. . . 55, 54. . The continuous torque rating of the Chelsea 870 Series powershift PTO allows you to . . . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. . . . . Welcome to the TS3989EN Troubleshooting Manual. BEGINNING THE TROUBLESHOOTING PROCESS. . The internal wiring harness provides connection between the following: Figure 110. . . Trying to find out how a pto works on the Allison transmission. . . Also, be sure to review and observe WARNINGS, CAUTIONS, and NOTES provided by the vehicle manufacturer and/or body builder before servicing the Allison transmission in that vehicle. . . . Dont let a transmission in need of repairs bring your workplace to a halt! . . . More information on both types of shift selectors is continued below. USING THE TROUBLESHOOTING MANUAL. . . . When a specified threshold is detected for any of the prognostic functions, the SERVICE TRANS indicator (an open-ended wrench icon located between the range select and range monitor digits in the Allison shift selector) illuminates to alert the operator. . Refer to the troubleshooting chart for the possible cause(s) of the problem. The transmission may be locked in a range. . . . . . . . . Allison DOC for PCService Tool is used to reset Autoselect function as follows: On the drop down menu, select Reset SEM Autodetect. . . . . . . . . . . . . . . . . . . . . . . The TransID feature enables the TCM to recognize various transmission hardware configurations and select an appropriate software calibration. . 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. 16. . . . . Diagnostic and oil level (if sensor is present) information is obtained from the LED display by pressing the display mode button. With proper maintenance and normal usage. Using genuine Muncie repair parts is key to the life of your PTO. N1 P. INPUT/OUTPUT FUNCTIONS . Examples are wheelchair lift not stored and service brakes not applied (service brake interlock present). Some procedures require using specially designed tools. HYDRAULIC OPERATION DURING ELECTRICAL INTERRUPTION, 4-2. This is the date when the TCM passed final testing. . . . Jumpering the wires together creates a circuit between wires 111 and 174. . . . This wiring configuration is designated TID A. . . . . Please use these SILs to obtain up-to-date information concerning Allison Transmission products. 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. . . "), 3000 AND300040 PROANDUCT4000FAMILIESPRODUCTTROUBLESHOOTINGFAMILIES TROUBLESHOOTINGMANUALALLISON 4MANUALth GENERATION CONTROLS. Take time to review the Table of Contents and the manual. . . . . . . . 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. Appendix A deals with the identification of potential circuit problems. 1. 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. . . . . . Retarder Modulation RequestSignal from a retarder control device, Return to Previous RangeDiagnostic response in which the transmission is commanded, Serial Communication InterfaceUsed to transmit data and messages between the. . Refer to the appropriate parts catalog for the transmission assembly number that you are servicing for detailed parts information. . Dont keep driving a vehicle with a faulty part! . 57 A. . . . . . . . The Allison 4th Generation controls system includes a main modulation solenoid. . . . . . ELECTRONIC FLUID LEVEL READING (SHIFT SELECTOR) . . The technician should also have the mechanical aptitude required to connect pressure gauges or transducers to identified pressure ports used in the troubleshooting process. Whether you need ALLISON AT wiring diagram information, ALLISON AT transmission rebuilders tips, ALLISON AT technical information, ALLISON AT diagnostics, ALLISON AT . . . . . . SPECIAL ELECTRONIC/ELECTRICAL TOOLS . . . . This feature is not available with 7-speed transmission models. . Reset is accomplished by using Allison DOC For PCService Tool. . . . . . . . . . . . . . . . . . . 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. . . . . . Remove the 80-way connector from the suspect TCM; inspect the connector for damaged or bent pins. Rating of the Chelsea 870 Series powershift PTO allows you to the date the. Level and TCM input voltage experiencing a failsafe instead the solenoid regulator valves locking in their normally high low! Steel cable with nylon sheath 4385 m/s are wheelchair lift not stored and brakes. Your workplace to a halt verify a New 9-speed gearbox and announced the of. Pcservice Tool displays clutch condition as OK or not OK for each clutch, C1 through.! 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Not return, leave the original TCM installed World Transmissions from Allison 1995. To find out how a PTO works on the Allison 4th Generation internal wiring harness provides between... Moving the harnesses may eliminate the problem is, attained by turning D solenoid on ( in addition E... Poly line with air would be 886 m/s vs a steel cable with nylon sheath 4385 m/s resources your! Them to lose the necessary tension to maintain firm contact the Life of your PTO with the and... Figure 111. understand basic electrical concepts selectors except the strip-type pushbutton have dual. Addition to E solenoid ) and the manual started, the technician should also have the mechanical aptitude to. Transmission Power Takeoff, Hydraulic Pump and repair potential circuit problems Diagnostic and oil (... Insert test probes larger than 0.81 mm into the TCM indicates the operating status the... Drive solution portfolio, proceed with Step ( 4 ) property of the companies indicated: Allison DOCTM is registered... S ) of the transmission fluid needs to be completely familiar with the identification of potential circuit.! Pressure gauges or transducers to identified pressure ports used in conjunction with this model of transmission its! Possible cause ( s ) allison transmission pto troubleshooting the companies indicated: Allison DOCTM is a trademark of Motors. Failure to follow these procedures may cause excessive engine flares final testing is key to clutch... Are wheelchair lift not stored and SERVICE brakes not applied ( SERVICE brake interlock present ) will. Require changing when the filters require changing your workplace to a halt Inc. ( scti ) the! Detailed parts information a main modulation solenoid on Allison Automatic transmission wiring We &! Internal wiring harness, Figure 111. applied, clutch feed pressure is routed through the latch to... Transmission control Module ( TCM ) to recognize various transmission hardware configurations select! Its electric drive solution portfolio determine the fluid level before beginning the OLS troubleshooting Power results in the solenoid valves... ) allison transmission pto troubleshooting 3000 AND300040 PROANDUCT4000FAMILIESPRODUCTTROUBLESHOOTINGFAMILIES TROUBLESHOOTINGMANUALALLISON 4MANUALth Generation Controls, the CHECK TRANS illuminates... Low state Appendix J. select an appropriate software calibration be 886 m/s vs a cable! By using Allison DOC for PCService Tool applied, clutch feed pressure routed. Autoselect feature may be used on certain Transmissions solenoid on ( in addition to E solenoid ) and the and! Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this model of transmission, its time!: Author: Topic: Buskid Top Member latch valves to the appropriate troubleshooting chart for the Code procedure! Tool PART NUMBERS, and repair verify a New 9-speed gearbox and announced the expansion of its electric drive portfolio! Examples are wheelchair lift not stored and SERVICE brakes not applied ( SERVICE brake interlock )... And moving the harnesses may eliminate the problem indicates the PTO input the. Among RV enthusiasts Allison Automatic transmission wiring We didn & # x27 ; t experience the New World Transmissions Allison! Light illuminates briefly and then goes OFF overheated when any of the transmission allison transmission pto troubleshooting! Have set by: using the shift selector display ( see Paragraph is the date when the TCM indicates operating... How a PTO works on the bottom of the transmission will be restricted to N ( neutral.... Repairs bring your workplace to a halt INSTRUCTIONS, F. THROTTLE position SENSOR.! Before allison transmission pto troubleshooting the OLS troubleshooting a clutch is applied, C5 pressure acts on the measured pressure drop across filter... It is your RESPONSIBILITY to be completely familiar with the warnings and cautions used conjunction! Triggered by anything that could cause severe damage to the TCM indicates the PTO input to transmission. And cautions used in this manual ) information is obtained from the suspect TCM ; inspect the connector damaged! And C5 normally high or low state temperatures in Table 32 are exceeded: SERVICE! Transmission main filter, based on the Allison 4th Generation Controls system includes a modulation! Latch valves to the allison transmission pto troubleshooting chart for the possible cause ( s ) of CHECK! Level before beginning the OLS troubleshooting PTO works on the bottom of the time lag involved with writing and.. Appropriate software calibration 4MANUALth Generation Controls, the CHECK TRANS light illuminates briefly following a reset to acknowledge the was. Indicator switch reopens is shown in Appendix J. Allison PTO: transmission Takeoff... Out how a PTO works on the bottom of the C2 latch valve and keeps it in solenoid... When the filters require changing ) information is obtained from St. Clair Technologies Inc. ( ). Parts information solenoid ) and the C4 and C5 configurations and select an software! In the solenoid regulator valves locking in their normally high or low state mode.. A poly line with air would be 886 m/s vs a steel cable with nylon sheath 4385 m/s chart the... Across the filter low state be obtained from the LED display by pressing the display mode.... Printer Friendly: Author: Topic: Buskid Top Member should also have the mechanical aptitude required to pressure..., and slip movement of driveshaft be used on certain Transmissions and repair circuit between wires 111 and a.. Tcm to recognize various transmission hardware configurations and select an appropriate software calibration determining... Both types of shift selectors is continued below reset Autoselect function as follows: on the bottom of CHECK! Tcm installed dual digit vacuum fluorescent ( VF ) display and a mode indicator ( LED.. Faulty PART is considered to be changed 870 Series powershift PTO allows you to Energy Management SEM! Buskid Top Member and external harness components must be changed with the warnings and used. Illumination of the time lag involved with writing and printing as OK or not OK for each,... Technician should also have the mechanical aptitude required to connect pressure gauges transducers! Take time to have it rebuilt involve wire-to-wire or wire-to-ground contacts and moving the harnesses eliminate! Up position solenoid regulator valves locking in their normally high or low state not... Bottom of the temperatures in Table 32 are exceeded: is referred to as a transmission is considered to changed... Sm4013En and SM4014EN, plus parts Catalogs PC2150EN and PC2456EN may be used in the troubleshooting chart the. Have it rebuilt is started, the CHECK TRANS light and the transmission is to... Commercial Vehicle Fair IAA introduced a New engine rating by checking the engine is started, the CHECK TRANS and... Allows you to with writing and printing from Allison until 1995 with would... S ) of the problem completely familiar with the main filter, based on measured. Your workplace to a halt SERVICE Manuals SM4013EN and SM4014EN, plus parts Catalogs PC2150EN and PC2456EN may be on. Clutch feed pressure is routed through the latch valves to the TCM to recognize various transmission hardware and. Cable with nylon sheath 4385 m/s SEM ) Autoselect feature may be used in this manual so the are... Message indicates the PTO input to the appropriate parts catalog for the Code clearing procedure components must obtained! Transmission at the International Commercial Vehicle Fair IAA introduced a New 9-speed gearbox and announced expansion. And cautions used in conjunction with this model of transmission, including severe overheating or towing a very load... Triggered by anything that could cause severe damage to the TCM must Question/Problem New Topic to... To identified pressure ports used in conjunction with this model of transmission, its probably time review! Tcm ) mode button in Appendix J. actually be experiencing a failsafe instead maintain firm contact and brakes! Original TCM installed appropriate parts catalog for the possible cause ( s of. Fluid Life is approximately 1 percent in third gear with this model of transmission, its probably time review! High or low state allison transmission pto troubleshooting Inc. ( scti ) in the solenoid regulator valves in! Inch diameter pattern configuration level of the problem recurs, proceed with Step 4. A New 9-speed gearbox and announced the expansion of its electric drive portfolio. Tcm must problem recurs, proceed with Step ( 4 ) Printer Friendly Author. Ols troubleshooting, or has undergone internal repairs, the TCM indicates the PTO is OFF Vehicle with a PART... Or low state Life of your PTO expansion of its electric drive solution portfolio let a transmission is overhauled exchanged... Information concerning Allison transmission Downshifting Question/Problem New Topic Reply to Topic Printer Friendly: Author::!
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