# Service bulletin 21\-021\-15

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: 10144860
- Published by NHTSA: 2018\-09\-24
- Manufacturer's number: 21\-021\-15
- Manufacturer's date: 2015\-03\-28
- NHTSA component: POWER TRAIN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

## NHTSA's summary

Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with new software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) illumination on vehicles equipped with a 948TE 9 speed automatic transmission \(sales code DFH or DFJ\). Upon further investigation, a technician may find Diagnostic Trouble Code \(DTC\) P1DAD \- Input Shaft\-Output Shaft Direction Correlation stored in the TCM memory. In addition to addressing the above DTC, this TCM calibration update is being released to enable the new wiTECH based ?Transmission Quick Learn? procedure to be performed anytime the transmission adaptation memory cells are cleared or when addressing customer concerns of poor shift quality. It is also being released to improve transmission downshift response time during normal driving.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10144860-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10144860-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Equipment and accessories, Labels and manuals, Transmission and driveline

## Trouble codes named

P1DAD

## Vehicles listed

- 2015 CHRYSLER 200
- 2015 JEEP CHEROKEE

## Recalls for the same vehicles and component

- [2024548](/recalls/tc/2024548.md), 2024-08-15: Label
- [2020261](/recalls/tc/2020261.md), 2020-06-12: Powertrain
- [20V343000](/recalls/nhtsa/20V343000.md), 2020-06-11: POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AUTOMATIC TRANSMISSION
- [2017663](/recalls/tc/2017663.md), 2017-12-22: Accessories
- [17V824000](/recalls/nhtsa/17V824000.md), 2017-12-21: EQUIPMENT
- [2016361](/recalls/tc/2016361.md), 2016-07-13: Powertrain
- [16V529000](/recalls/nhtsa/16V529000.md), 2016-07-12: POWER TRAIN:AUTOMATIC TRANSMISSION
- [2015588](/recalls/tc/2015588.md), 2015-12-09: Accessories
- [15V461000](/recalls/nhtsa/15V461000.md), 2015-07-23: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
- [2015271](/recalls/tc/2015271.md), 2015-06-17: Accessories

## Other bulletins for the same vehicles and component

- [S1721000016 REV.B](/bulletins/11026812.md), 2025-12-23, Service bulletin: POWER TRAIN. Service 4wd Light On, AWD System Service Required Message Illuminated. Diagnostic Trouble Code \(DTC\) C14A7\-97 PTU Motor Component Or System Operation Obstructed Or Blocked.
- [21\-040\-25](/bulletins/11024056.md), 2025-10-08, Service bulletin: POWER TRAIN. 948TE Transmission Reaction Shaft Service Bushing Kit Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P1DB7\-00 \- Torque Converter Clutch Performance.
- [S2325000007](/bulletins/10248564.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). MIL/check engine lamp comes on after performing U90 recall PCM software update.
- [S2325000007](/bulletins/10244403.md), 2023-10-30, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). MIL/check engine lamp comes on after performing U90 recall PCM software update.
- [93120](/bulletins/10243209.md), 2023-10-02, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. FCA Caribbean Warranty Bulletin ID\-23\-20 "Can / Am" Warranty Coverage \- 594 / 595 / 596 WCC
- [93023](/bulletins/10243208.md), 2023-10-02, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Warranty Bulletin D\-16\-03 \- "Can / Am" Warranty Coverage \- 594 / 595 / 596 WCC \(Rev. B\)
- [9100196](/bulletins/10242717.md), 2023-09-25, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Lubrication and Maintenance Fluids If MOPAR fluids and chemicals are not readily available, please review Service Library for specifications so a suitable alternative can be used
- [2101423](/bulletins/10241067.md), 2023-08-21, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. Power Transfer Unit \(PTU\) Broken Input Spline XJ1 Warranty Extension Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ? P1720\-00 \- Output Speed Sensor Wheel Speed Rationality. ? P215C\-00 \- Output Shaft Speed Wheel Speed Correlation. This bulletin involves replacing the PTU assembly with an updated part.
- [91490](/bulletins/10241042.md), 2023-08-21, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER. FCA Caribbean Warranty Bulletin ID\-23\-11 \(XJ1\) Power Transfer Unit \(PTU\) \- Select 2014 \- 2017 Jeep Cherokee \(KL\)
- [91486](/bulletins/10241041.md), 2023-08-21, Service bulletin: POWER TRAIN; UNKNOWN OR OTHER. Warranty Bulletin D\-23\-10 \(XJ1\) Power Transfer Unit \(PTU\) \- Select 2014 \- 2017 Jeep Cherokee \(KL\)

JSON: [/v1/bulletins/10144860](/v1/bulletins/10144860)

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