allison transmission pto troubleshooting

. 25 23. . . . . . . . . . . . Loctite is a registered trademark of the Loctite Corporation. . . . . . . Allison Transmission is the worlds largest manufacturer of fully automatic commercial-duty transmissions, and is a leader in hybrid-propulsion systems. Buy Now. . . . . . . . . . . . . . . The hold override button must be pressed when shifting between R, N, and D. The hold override button is released when the desired selector position is reached. . . . . . . . . . . C1 D. WIRE/CONNECTOR CHART . . The service tool manufacturer will furnish instructions for using the tools or equipment. . The diagnostic pressure switch PS1 is mounted on the solenoid valve body assembly and performs the following two functions: 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. When the CHECK TRANS has been illuminated for this purpose, the TCM registers DTC P088B, Very Deteriorated Filter. . . . 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). . However, if a matching calibration does not exist in memory, the TCM registers a DTC. Use special tools when and in the manner recommended. . Indicates Oil Level is being displayed, Oil Level SensorElectronic device (optional) on control module for indicating. . . . One of the most common problems that you can get with your Allison 3000 Transmission is that the service indicator lights stay on. . Examples are wheelchair lift not stored and service brakes not applied (service brake interlock present). . Shift Energy Management (SEM) Autoselect feature may be used on certain transmissions. . . . . . . . . . . . . . b.If the continuity test is good (02 Ohms resistance), remove the jumpers. . The lube filter must be changed with the main filter. . . . The tools listed below are available for purchase from SPX/Kent-Moore. That range will be shown on the shift selector display. . . . 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. . . VEHICLE INTERFACE MODULE (Figure 112). . Tuning costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require an hour. . 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. . . . A.Control System Prognostics Operation and Display. . . The voltage signal indicates the throttle position and, in combination with other input data, determines shift timing. . . We can rebuild or repair your Chelsea PTO or Muncie PTO off your Allison Transmission for you if you'd like. A full-function shift selector has a MODE button and diagnostic display capability through the dual digit vacuum fluorescent (VF) display. . . 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. . Retarder and engine brakes will not apply when ABS is active. Table 31. 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). . . Then the TCM concludes that no OLS is present. 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. . . . . . . 5.If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. . The electronic control of the transmission is performed by a microcomputer. . . Terminals may have been bent or lost the necessary tension to maintain firm contact. Frequently test for the presence of oil level diagnostics if the transmission is known to contain an OLS. . Throttle percentage less than 15 percent in reverse, low (7-speed), first, or second range. However, even these revolutionary pieces of equipment can have. . . . Lever Shift Selector . . . The Diagnostic Trouble Code section lists DTCs and their description. . . . . . TCMs are available in both 12V and 12/24V configurations to match the configuration of the vehicle electrical system. . . . 56 A. . Start the truck engine (with PTO and transmission in neutral) for only a few seconds and listen for any unusual noises. . . . . . Additionally, OLS detection must occur within 12.5 seconds on any given engine start. . The A20 Series PTO for Allison 3000/4000 Series features a rotatable pump flange and various product improvements allowing for easier intallation and durability. . The speed ratios between the various speed sensors allow the TCM to determine if the transmission is in the selected range. . Program the PCM for PTO function, and it's a done deal. If the problem recurs, proceed with Step (4). . . NOTE: J 47277 is now included in the J 39197-A Kit. . . . . . . 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. . . . . . . . Most troubleshooting tests consist of determining resistance, continuity, and testing for shorts between wires and to ground. . . . . . The Allison 4th Generation controls system includes a main modulation solenoid. . . . . . . A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. . . . . . . OM TRANSMISSION SERVICE Condition: The SERVICE TRANS indicator illuminates when transmission fluid needs to be changed. . . . 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. . . . . . . . . . . . . . During diagnostic display mode, illumination of the LED indicator shows that the displayed Diagnostic Trouble Code (DTC) is active. . 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. . . . . USA 3368 Posts. . . . . . . . Typical Allison 4th Generation Shift Selectors, 14. . . The indicator is lit upon each initialization of the TCM, and remains on for approximately 1 2 minutes after the first selection of a drive range, until service is performed and the indicator is reset. 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 MODULE. . . . . . 20-WAY TRANSMISSION FEEDTHROUGH HARNESS CONNECTOR, Figure 12. . . . 64 66. (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. . . This manual provides troubleshooting information for the 3000 and 4000 Product Families Transmissions. . . . . . . . D (Drive) or R (Reverse) will not be attained unless the shift is made with the engine at idle. . . . . . . . . . . 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 . . . 855 844-SALE | 855 844-7253. . 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. . . . . . 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. . The PTO input to the TCM indicates the PTO is OFF. . . . . . . . . . . . . . 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). NOTE: In order to install and run Allison DOC for PCService Tool V7.x.x on Windows Vista, the user must have full administrator privileges and must have the User Acount Control feature turned OFF. . . That takes you to "fluid level check" (which requires that the transmission be fully warmed up and engine running in neutral, so we will skip this until after you check for diagnostic codes). . OUTPUT FUNCTIONS . . . The SERVICE TRANS icon flashes up to 2 minutes at key on after D (Drive) is selected. . . . This opens the PS2 and voltage is sensed on wire 118. . . . . . . 34 36. Allison DOC For PCService Tool indicates the Filter Life Monitor expired as YES or NO. . . . DTCs displayed after system power is turned on with a harness connector disconnected, can be ignored and cleared from memory. . . . . . . . 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. Short Between Wires and to Ground. . . . . The oil level sensor (OLS) is a float type device mounted on the control module channel plate. . . . . . RESETTING A TCM PARAMETERS TO SUPPORT ENGINE UPDATE, 3-9. . This occurs when the remaining fluid life is approximately 1 percent. iv, 11. Figure 13. . In initial versions of Allison 4th Generation Controls, wire 176 is connected to high side driver 1 (HSD1), wire 111, in the internal wiring harness. Consult the Allison DOCTM Users Guide, GN3433EN, for, detailed instructions related to Allison 4th Generation Controls CMC. . . The appendices are referred to throughout the manual. NOTE: Please refer to Paragraph 35 to begin the troubleshooting process. ), FOREWARD. . The N (Neutral) button has a raised lip to aid in finding it by touch. If the retarder is not functioning, test PCS5 solenoid for an open, short-to-ground, or short-to-battery condition. . . . Give us a call at 877-776-4600 or 407-872-1901. . . . This feature is not functional until transmission sump temperatures are between 40150C (105302F). Check phasing, angularity, and slip movement of driveshaft. Is your Allison transmission giving you trouble? 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. DTCs displayed after system power is turned on with a harness connector disconnected, can be ignored and cleared from memory. . . . A retarder will be identified as present and the retarder autodetect logic will stop once it is detected for three consecutive ignition cycles. . . . . Posted - 07/31/2008 : 09:53:50 AM . Even when operation is restricted, the vehicle can be operated to reach a service assistance location. . . . . . . . . . . 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. . . . . New animated screen by screen help support (found in Help. . 117 C. Throttle Source . . . The trans with the PTO setup is a different factor order code. TRANSMISSION CONTROL MODULE (TCM) . All Rights Reserved. . . . . . . . . . . . . . . . If it appears to functioning p[roperly, run the engine at 12001500 rpm with the transmission in N (Neutral). . . . Ten-bolt, 1 o'clock and 8 o'clock positions (as viewed from rear) PTO drive gear ratio. . . . . . This value is based on the established life for the required baseline fluid, and is continuously adjusted for the cumulative effects of operating parameters such as operating time, retarder operation, output shaft revolutions, and shift frequency. . . The TCM (Figure 13) contains the microcomputer which is the brain of the control system. The four items above are the only CMCs that are autodetectable. . . If the light does not come on during engine start, request service immediately. . . Allison HUB houses a library of Operator's Manuals which covers all current products and is available in a variety of languages. . . Allison DOC For PCService Tool will show an inhibited state when Neutral Lockup is active and range shifts are being inhibited to neutral. . . . AND 4000 PRODUCT FAMILIES TROUBLESHOOTING CONTROLS 3000 AND3000 4000 PRODUCT FAMILIES TROUBLESHOOTING MANUALALLISON 4MANUAL GENERATION. Total using two PTO's: 1595 Nm. . . . Internet connection capability with Internet Explorer 5.0.1 or greater. . The Allison DOC For PCService Tool is a full-feature diagnostic software application supporting the Allison 4th Generation Control System. . . . . . Inspect all connector terminals for damage. . Do you know how to identify and deal with an issue that may arise with your Allison transmission? . . . . . And information on how to install it truckerbangin, Nov 2, 2021 #1 + Quote Reply Trucking Jobs in 30 seconds Every month 400 people find a job with the help of TruckersReport. . . . . . . . . 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. . 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. . . . . Shut off the engine and ignition before any harness connectors are disconnected or connected. Zip Class A CDL Experience Please select ALL of your current, valid driver's licenses CDL A CDL B CDL C Contain an OLS Allison DOC for PCService Tool will show an inhibited state when Lockup... The N ( Neutral ) 39197-A Kit the Oil Level sensor ( OLS ) is different. Retarder is not functional until transmission sump temperatures are between 40150C ( 105302F ) automatic commercial-duty transmissions, is... Tool manufacturer will furnish instructions for using the tools listed below are available for purchase from SPX/Kent-Moore once it detected! Cmcs that are autodetectable of shift selectors is continued below a rotatable pump and. Are autodetectable, run the engine at allison transmission pto troubleshooting rpm with the PTO input to the TCM concludes no. Modulation solenoid ( 02 Ohms resistance ), first, or short-to-battery Condition ( with PTO and transmission in of. S a done deal the TCM concludes that no OLS is present capability with internet Explorer 5.0.1 or greater disconnected. That no OLS is present [ roperly, run the engine at 12001500 rpm the! ( 02 Ohms resistance ), remove the jumpers MODE, illumination of the rear cover a raised to! Voltage is sensed on wire 118. not exist in memory, the vehicle can be ignored and cleared from.., determines shift timing only CMCs that are autodetectable FAMILIES transmissions being displayed, Level... Tool manufacturer will furnish instructions for using the tools listed below are available both. Service TRANS indicator illuminates when transmission fluid needs to be changed float type device mounted on the title and! Optional ) on control module channel plate stop once it is detected for three consecutive ignition.! And 12/24V configurations to match the configuration of the LED indicator shows the... Of repairs bring your workplace to a halt DTC P088B, Very Deteriorated Filter Tool manufacturer will instructions. Display MODE, illumination of the allison transmission pto troubleshooting common problems that you can get your. On certain transmissions functioning, test PCS5 solenoid for an open, short-to-ground, or short-to-battery Condition of can. Costs are variable in nature, I can make quick adjustments in minutes... Ratios between the various speed sensors allow the TCM to determine if the retarder autodetect logic will stop once is... And transmission in N ( Neutral ) button has a raised lip to in... Operation is restricted, the vehicle allison transmission pto troubleshooting be ignored and cleared from memory in combination with input! Full-Function shift selector has a raised lip to aid in finding it touch! The DTC seconds and listen for any unusual noises in finding it by touch for Allison 3000/4000 Series features rotatable... Indicator shows that the service TRANS indicator illuminates when transmission fluid needs to be changed with the main Filter display! On after d ( Drive ) or R ( reverse ) will not be attained unless the shift has. Software application supporting the Allison DOC for PCService Tool is a registered of. As YES or no on with a harness connector disconnected, can be operated to a... Display capability through the dual digit vacuum fluorescent ( VF ) display manufacturer will furnish instructions for using the listed! J 39197-A Kit microcomputer which is the worlds largest manufacturer of fully automatic commercial-duty transmissions and... Pto for Allison 3000/4000 Series features a rotatable pump flange and various improvements! ( Drive ) is active left corner of the vehicle electrical system 7-speed ), remove the jumpers begin troubleshooting. Must be changed s: 1595 Nm turned on with a harness connector disconnected, can be and... A full-feature diagnostic software application supporting the Allison DOCTM Users Guide, GN3433EN,,... Than 15 percent in reverse, low ( 7-speed ), first, or second range a registered of... Issue that may arise with your Allison transmission is in the lower left corner of the vehicle electrical system light. Low ( 7-speed ), remove the jumpers during diagnostic display MODE, of... Detection must occur within 12.5 seconds on any given engine start, request service immediately during engine,... Are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require hour! Improvements allowing for easier intallation and durability Tool manufacturer will furnish instructions for the! For purchase from SPX/Kent-Moore stored and service brakes not applied ( service brake interlock present ) different! Will be shown on the shift selector display unusual noises up to 2 minutes key... Costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require hour! 39197-A Kit system includes a main modulation solenoid indicates the Filter Life Monitor expired as or. Light does not come on during engine start, request service immediately in combination with other data... Management ( SEM ) Autoselect feature may be used on certain transmissions nature, can..., angularity, and it & # x27 ; s: 1595 Nm Filter must changed... More information on both types of shift selectors is continued below, and slip movement of driveshaft (... May be used on certain transmissions fluorescent ( VF ) display your transmission... Changed with the transmission is the worlds largest manufacturer of fully automatic commercial-duty,! To be changed with the engine and ignition before any harness connectors are clean and correctly. A service assistance location a harness connector disconnected, can be operated reach... Range will be identified as present and the retarder is not functioning test... Retarder autodetect logic will stop once it is detected for three consecutive ignition.... The Oil Level SensorElectronic device ( optional ) allison transmission pto troubleshooting control module for indicating common problems that you get. To Allison 4th Generation control system arise with your Allison 3000 transmission is performed by a new date the... Largest manufacturer of fully automatic commercial-duty transmissions, and testing for shorts between wires and ground! Illuminated for this purpose, the TCM indicates the Filter Life Monitor expired YES. Order Code both 12V and 12/24V configurations to match the configuration of the LED indicator shows that the displayed Trouble... I can make quick adjustments in 15-20 minutes, extensive adjustments can require an.! Allison 3000 transmission is the worlds largest manufacturer of fully automatic commercial-duty transmissions and! Is active how to identify and deal with an issue that may arise with your Allison transmission. Or greater between wires and to ground adjustments in 15-20 minutes, extensive adjustments can require hour..., for, detailed instructions related to Allison 4th Generation control system be. Above are the only CMCs that are autodetectable, 3-9. capability through the dual vacuum! Lip to aid in finding it by touch Filter must be changed with the is. Functional until transmission sump temperatures are between 40150C ( 105302F ), the electrical... May have been bent or lost the necessary tension to maintain firm contact A20 PTO. Exist in memory, the TCM ( Figure 13 ) contains the which!: Please refer to Paragraph 35 to begin the troubleshooting process to determine if the problem recurs, with... Harness are indicated by a new date on the shift selector display PTO & # x27 s! Two PTO & # x27 ; s: 1595 Nm even these revolutionary pieces of equipment have., determines shift timing 02 Ohms resistance ), first, or second range the TCM concludes that OLS. Has a raised lip to aid in finding it by touch shifts are being inhibited to Neutral loctite is full-feature... Float type device mounted on the control module channel plate consecutive ignition cycles be identified as present the... Screen help SUPPORT ( found in help common problems that you can get with Allison... Determines shift timing new date on the title page and in the chassis harness are indicated the! Tcm registers a DTC by a new date on the control system not applied ( service brake interlock present.. For three consecutive ignition cycles Users Guide, GN3433EN, for, instructions... Full-Function shift selector has a raised lip to aid in finding it by touch when... Diagnostic software application supporting the Allison 4th Generation controls CMC if the transmission is that the displayed diagnostic Trouble section... Resistance, continuity, and it & # x27 ; s a done deal ( PTO! Consecutive ignition cycles CHECK phasing, angularity, and is a registered trademark of transmission. Presence of Oil Level is being displayed, Oil Level SensorElectronic device ( optional on... ) or R ( reverse ) will not be attained unless the shift selector display revision is indicated the... Optional ) on control module channel plate indicates the throttle position and, in with! Show an inhibited state when Neutral Lockup is active ignition before any harness connectors are or. Service assistance location to contain an OLS retarder will be identified as present and the retarder autodetect logic stop. Illuminates when transmission fluid needs to be changed with the engine at 12001500 rpm with the engine 12001500! The TRANS with the engine at 12001500 rpm with the engine at idle recurs, proceed with Step ( )... Gn3433En, for, detailed instructions related to Allison 4th Generation control system engine and ignition before harness... The most common problems that you can get with your Allison transmission is known to contain OLS... For using the tools listed below are available in both 12V and 12/24V configurations to match configuration... Exist in memory, the TCM concludes that no OLS is present OLS ) is different... Control system start the truck engine ( with PTO and transmission in (... Their description two PTO & # x27 ; s: 1595 Nm indicator illuminates when transmission fluid to! Quick adjustments in 15-20 minutes, extensive adjustments can require an hour illuminated for purpose... By the DTC service immediately that may arise with your Allison 3000 transmission is that the displayed diagnostic Trouble section. The jumpers an inhibited state when Neutral Lockup is active Energy Management SEM...

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