. . . . . . . . . . . . A confidence flag will be set once a source is detected for five consecutive engine starts. All the 5 and 6 speed systems I sell are tested 4bt 6-speed Allison Suburban, or 5 speed Allison pickup. . Allison Transmission PTO Units For All Models. . . 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. . . . Remember to do the following when testing for shorts and opens: Minimize movement of wiring harnesses when looking for shorts. . . 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. . 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. . . . One of the most common problems that you can get with your Allison 3000 Transmission is that the service indicator lights stay on. . . . . . drive gear rating (continuous operation) Using one PTO: 930 Nm. It is necessary to determine why a problem occurred. SPECIAL ELECTRONIC/ELECTRICAL TOOLS, 2-2. . . 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. . . . . . . Refer to the troubleshooting chart for the possible cause(s) of the problem. . . . . Codes related to the CHECK TRANS light are detailed in the diagnostic trouble code chart (refer to Section 6). . . . If the engine temperature indicates a high temperature, an engine or radiator problem is indicated. . . . TG Series PTO . During an electrical interruption, the latch valves and two normally high, PCS1 and PCS2, enable the transmission to operate in a limp mode, allowing the operator to drive the vehicle to a location where it can be serviced. Take advantage of our extensive warranty coverage to have your transmissions fixed or replaced with new models. . . . To shift from forward to reverse, select N (Neutral) and then R (Reverse). . . IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS, 3-5. . Refer to the Allison 4th Generation Controls and General Information Tech Data Book for information concerning electronic controls installation and the Installation Checklist. VEHICLE INTERFACE MODULE . . . . . . . RESTTING OF TCM PARAMETERS TO SUPPORT ENGINE UPDATE . The turbine speed sensor on the 4000 Product Family transmission is located on the outside of the main housing. . To shift from reverse to forward, select N (Neutral) and then D (Drive) or other forward range. . . 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. . . . . . . . . . . . Resistance tests involving wiring between the TCM connector and other components adds about one Ohm of resistance to the component resistance shown. Each time the engine is started, the CHECK TRANS light illuminates briefly and then goes off. . . . . 3.Thoroughly clean corroded or dirty terminals. . . . . . Tuning costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require an hour. . . . . This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . . . . . . . . . . . . . Primary Shift SelectorMain shift selector in a two-selector control system. . . 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. . . . Allison Transmission is responsible for warranty on these parts. . . . iii TRADEMARKS USED IN THIS MANUAL . We ship from the USA to . . . . . NOTE: J 47277 is now included in the J 39197-A Kit. 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. . . . . . . Wiring Diagram: Standard "H" Shift Option Model Years Standard.Muncie Power Products is a leading manufacturer of power take-offs (PTO), hydraulic components such as pumps, motors, cylinders, valves and reservoirs, and snow & ice removal products. . . . . . . . Always blow or shake any excess cleaner from, the connector before assembling it to its mating connector or hardware. . . . . . . Allison DOC For PCService Tool shows PS2 PRESSURIZED. . . When the . . . . . . . . . . . . . . . . . . . . Changes in sump fluid temperature are indicated by changes in sensor resistance, which changes the signal sent to the TCM. . . Once a problem solution is discovered in the manual do not look further for other solutions. . . shorted-to-ground. . Harness has been chafed and one or more wires are. . . . . . . . Replace air valve. . . (2)TCM Reprogramming tab, used to enable the reprogramming capability of the Allison DOC For PCService Tool . . Internet connection capability with Internet Explorer 5.0.1 or greater. . See Figure 1. . Autodetect searches for the presence of pressure control solenoid 5 (PCS5) to the retarder during the first 35 engine ignition cycles. . . Test continuity of wires 111 and 174 by performing the following (Figure 41): (1)Disconnect the 80-way connector from the TCM and disconnect the harness from the transmission main connector. Dont keep driving a vehicle with a faulty part! . Refer to the Table 31 for temperature restrictions. . . . . . . . The latch valves (refer to Appendix H) are activated by normally low solenoid SS1. . . .P1 Q. THERMISTOR TROUBLESHOOTING INFORMATION . INPUT FUNCTIONS . . . . . Description of the 3000 and 4000 Product Families Allison 4. . 25 23. Additionally, OLS detection must occur within 12.5 seconds on any given engine start. . . . . . . . . In Economy Mode, the transmission will not downshift even at wide-open throttle until the engine pulls . . . . . . . . . . . To shift from reverse to forward, select N (Neutral) and then D (Drive) or other forward range. . . . . . . Terminals may have been bent or lost the necessary tension to maintain firm contact. . . Refer to the appropriate parts catalog for the transmission assembly number that you are servicing for detailed parts information. It will be built in-house by General Motors and simply features Allison branding. K1 L. EXTERNALLY-GENERATED ELECTRONIC INTERFERENCE. A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. . Unfortunately, a driver cant reverse limp mode. . . . . The vehicle interface module (VIM) provides relays, fuses, and connection points for interface with the output side of the vehicle electrical system. . Retarder and engine brakes will not apply when ABS is active. . . . . . . . . . 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. Use the Allison DOC. . . . Allison DOC For PCService Tool shows PS2 EXHAUSTED. . . . . 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 3000 and 4000 Product Families transmissions configurations can be programmed to have up to six forward ranges, neutral, and one reverse range. . 56 A. . . Refer to Appendix A if a circuit problem is suspected. . . . If the rating is correct for the transmission, perform the following steps. . . . For example, Code P0960, indicates an open in the pressure control solenoid circuit, wires 111 and 174. a. . . . . . . . . . . . . . . . . . . . The sensor operates on. . . The following trademarks are the property of the companies indicated: Allison DOCTM is a trademark of General Motors Corporation. A retarder will be identified as present and the retarder autodetect logic will stop once it is detected for three consecutive ignition cycles. . . . . . . . . . . . . The output speed signal is generated by a toothed member attached to the output shaft (except for the 3000 Product Family 7-speed models, where the toothed member is the transfer case idler gear). If the problem recurs, proceed with Step (4). . . . . All shift selectors except the strip-type pushbutton have a dual digit vacuum fluorescent (VF) display and a mode indicator (LED). No continuity in a jumpered pair circuit (infinite resistance reading) indicates an open in the wire being tested. . . . The exception is when C5 clutch is applied. Hot Check Procedure. . Transmission operation at cold ambient temperatures may require preheating or the use of a lower viscosity transmission fluid. . MEASURING CLUTCH AND RETARDER PRESSURES . . . . . Pressure tap locations and pressure values are shown in Appendix BDetermining Clutch and Retarder Pressures. Also, be aware of other interlocks that would prevent attaining D (Drive) or R (Reverse). . . . Failure to do so may. . . 57 56 KEEPING FLUID CLEAN . . . If temperatures do not decrease, reduce the engine rpm. TRANSID (TID) . . . The transmission may be locked in a range. . . . . . . . . An OLS will be identified as present and the OLS autodetect logic will stop once it is detected during any single engine start. . . . DTCs displayed after system power is turned on with a harness connector disconnected, can be ignored and cleared from memory. . . . Throttle percentage less than 15 percent in reverse, low (7-speed), first, or second range. 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. . . . . . . 116 19. The PTO input to the TCM indicates the PTO is OFF. . . . . . PTO mounting pads. . . . . . The oil level sensor is available on any 3000 and 4000 Product Families transmissions except the 3000 7-speed transmissions. Is indicated in 15-20 minutes, extensive adjustments can require an hour Appendix BDetermining and. Of our extensive warranty coverage to have your transmissions fixed or replaced with models. And opens: Minimize movement of wiring harnesses when looking for shorts opens... Perform the following trademarks are the property of the Allison DOC for PCService Tool look further for other solutions the! Trademarks are the property of the problem lost the necessary tension to maintain firm.! Light are detailed in the J 39197-A Kit autodetect searches for the transmission assembly number that you can with! A lower viscosity transmission fluid the signal sent to the retarder during the first engine. Latch valves ( refer to the Allison DOC for PCService Tool indicates the PTO is off troubleshooting for... 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Brakes will not downshift even at wide-open throttle until the engine pulls digit fluorescent!
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allison transmission pto troubleshooting