# Service bulletin 21\-017\-14

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: 10218231
- Published by NHTSA: 2022\-08\-22
- Manufacturer's number: 21\-017\-14
- Manufacturer's date: 2014\-11\-26
- NHTSA component: EQUIPMENT; POWER TRAIN; ELECTRICAL SYSTEM

## NHTSA's summary

Flash: Transmission Shift And Driveability Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) and Transmission Control Module \(TCM\) with new software.Both the PCM and TCM must be up to date for these changes to be effective. The customer may indicate that they are not satisfied with the shift quality of the transmission. Improvements to the transmission calibration have been made to the following:Upshift Improvements Shift quality in Normal Mode Shift quality in Sport Mode Shift inhibit while transitioning in/out of MDSDownshift Improvements Downshift quality while accelerating Downshift quality while coastingGeneral Improvements Torque converter clutch control during interlocked downshifts Torque converter clutch control during accelerator pedal tip in/out High speed gear hunting \(shifting back/forth repeatedly between two gears\) Allow 3rd gear launch at high altitude while in Snow Mode 2nd gear launch quality in ECO mode Improved reverse speed Display 2nd gear when entering Manual Mode from Snow or ECO Mode

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10218231-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10218231-9999.pdf)

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

## Components

Electrical system, Equipment and accessories, Transmission and driveline

## Vehicles listed

- 2014 JEEP GRAND CHEROKEE

## Recalls for the same vehicles and component

- [18V332000](/recalls/nhtsa/18V332000.md), 2018-05-17: ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING
- [2017574](/recalls/tc/2017574.md), 2017-11-22: Electrical
- [17V741000](/recalls/nhtsa/17V741000.md), 2017-11-21: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- [2017341](/recalls/tc/2017341.md), 2017-07-10: Electrical
- [17V435000](/recalls/nhtsa/17V435000.md), 2017-07-10: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
- [2016184](/recalls/tc/2016184.md), 2016-04-26: Powertrain
- [16V240000](/recalls/nhtsa/16V240000.md), 2016-04-25: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [15V461000](/recalls/nhtsa/15V461000.md), 2015-07-23: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.
- [2014448](/recalls/tc/2014448.md), 2014-10-09: Electrical
- [2014446](/recalls/tc/2014446.md), 2014-10-09: Electrical

## Other bulletins for the same vehicles and component

- [S1623000028 Rev. K](/bulletins/11033975.md), 2026-06-18, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [S1623000028 REV.I](/bulletins/11033308.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM; STRUCTURE:BODY. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
- [S2623000023](/bulletins/11031337.md), 2026-04-15, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Power Liftgate Inoperative.
- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [S2608000010](/bulletins/11030042.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. Active Diagnostic Trouble Code \(DTC\) B1A10\-00, B1A11\-00, B1A12\- 00, B1A13\-00\-, B1A14\-00, B1A15\-00, B1A16\-00, and B1A17\-00 in The Radio Frequency Hub \(RFH\)
- [9100671](/bulletins/11023329.md), 2025-09-24, Service bulletin: ELECTRICAL SYSTEM. Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order "68" part number for New unsold units only.
- [S2208000138 REV.B](/bulletins/11020600.md), 2025-07-09, Service bulletin: ELECTRICAL SYSTEM. Decreased Remote Start And RKE Range. Tire Pressure Sensors Values Are Not Displayed
- [S1408000384 REV.H](/bulletins/11013171.md), 2025-01-28, Service bulletin: ELECTRICAL SYSTEM. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On
- [101232](/bulletins/11010205.md), 2024-11-07, Service bulletin: POWER TRAIN. Plate \- Planetary
- [S1408000384](/bulletins/10251783.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On

JSON: [/v1/bulletins/10218231](/v1/bulletins/10218231)

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