Service bulletin 21-018-14 REV. A
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10141218 |
| Published by NHTSA | 2018-06-18 |
| Manufacturer's number | 21-018-14 REV. A |
| Manufacturer's date | 2014-07-09 |
| NHTSA component | ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN |
NHTSA's summary
Flash: Transmission Shift and Diagnostic Enhancements This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with new software. NOTE: Vehicles that are being updated from TCM software p/n 682235$$AN or 682354$$AN ($$ are wild cards for any number) will not require the transmission Adaptation Learn Procedure as indicated in Service Bulletin 21-013-13. However, vehicles that are being updated from any other TCM software may require the transmission Adaptation Learn Procedure. Refer to Service Bulletin 21-013-13 for detailed procedures. Failure to perform the procedures outlined in Service Bulletin 21-013-13 on vehicles that were updated from any other TCM software besides p/n 682235$$AN or 682354$$AN may result in undesirable shift quality. Diagnostic Trouble Code (DTC) robustness improvements are included in this software release. These improvements apply to the following DTC?s: ? P072F- Stuck in Gear 4 ? P076F- Gear 7 shift incorrect ratio ? P0810- Clutch position control error ? P1CC9- Unable to engage gear ? P0734- Gear 4 shift incorrect ratio ? P061B- Internal control module torque calculation performance NOTE: Diagnostic Trouble Code (DTC) robustness improvements were included in TCM software p/n 682235$$AN or 682354$$AN ($$ are wild cards for any number). Standard diagnostic trouble shooting procedures should be followed for any vehicle equipped with TCM software p/n 682235$$AN or 682354$$AN exhibiting any of the previous codes. Transmission shift improvements are included in this software release. These improvements apply to the following: ? Garage shifts (Park to Reverse or Drive). ? Coastdown shift quality. ? Shift quality. ? Throttle response and performance feel. ? Management and prevention of busy shifting. ? Lift foot/change mind shift quality.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Electrical system, Transmission and driveline, Automatic transmission, Transmission control module
Trouble codes named
P061B, P072F, P0734, P076F, P0810, P1CC9
| JEEP CHEROKEE | 2014 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 20V343000 | 2020-06-11. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AUTOMATIC TRANSMISSION |
|---|---|
| 19V447000 | 2019-06-13. POWER TRAIN:AUTOMATIC TRANSMISSION |
| 16V529000 | 2016-07-12. POWER TRAIN:AUTOMATIC TRANSMISSION |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| S2325000007 | 2024-01-08. Service bulletin. MIL/check engine lamp comes on after performing U90 recall PCM software update. |
|---|---|
| S2325000007 | 2023-10-30. Service bulletin. MIL/check engine lamp comes on after performing U90 recall PCM software update. |
| 1806014-1 | 2023-02-21. Service bulletin. Diagnostic And System Improvements |
| 2101814 | 2023-01-17. Service bulletin. Transmission Shift and Diagnostic Enhancements |
| V51 | 2022-12-19. Service bulletin. Customer Satisfaction Notification V51 Reprogram Powertrain Control Module |
| 2101616 | 2022-10-24. Service bulletin. Transmission Diagnostic And Shift Enhancements |
| 74595 | 2022-10-17. Service bulletin. Warranty Bulletin D-21-07 (X89) Power Transfer Unit - 2014-2017 Jeep Cherokee (KL) |
| 1803114 | 2022-09-26. Service bulletin. Flash: MIL Illumination P1239, P0298- Engine Oil Temperature Too Low Or High, P0300 Multiple Cylinder Misfire, Includes Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code has been set: P1239 - Engine Oil Temperature Too Low, set in cold ambient temperatures. P0298 - Engine Oil Temperature Too High, set in cold ambient temperatures. P0300 - Multiple Cylinder Misfire, may set at a 1-2 upshift above 6000 RPM. Possible rough idle when engaging Drive while in 4 LOW after a cold start .The following system improvements have also been included in this software release: Corrected a generic scan tool display issue regarding Mode 6 data accuracy. |
| W84 | 2022-09-26. Service bulletin. Customer Satisfaction Notification W84 Powertrain Software Update |
| 18-031-14 | 2022-08-29. Service bulletin. Flash: MIL Illumination P1239- Engine Oil Temperature Too Low. Includes Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that the following Diagnostic Trouble Code has been set: ? P1239 - Engine Oil Temperature Too Low The following system improvements have also been included in this software release: ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy |