# Service bulletin 21\-026\-17

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: 10138913
- Published by NHTSA: 2018\-06\-04
- Manufacturer's number: 21\-026\-17
- Manufacturer's date: 2017\-06\-14
- NHTSA component: POWER TRAIN

## NHTSA's summary

Flash: Transmission Diagnostic and Shift Enhancements AN\-M4\-21\-20170616 Refer to China Joint Venture \(JV\) released document AN\-M4\-21\-20170616, for details on this service action.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10138913-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10138913-0001.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2017 JEEP COMPASS

## Recalls for the same vehicles and component

- [2017251](/recalls/tc/2017251.md), 2017-05-10: Powertrain
- [17V301000](/recalls/nhtsa/17V301000.md), 2017-05-09: POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT

## Other bulletins for the same vehicles and component

- [9100776](/bulletins/11030018.md), 2026-03-13, Service bulletin: POWER TRAIN. Before replacing the RDM, please be aware that NVH from differential gears is typical and within the acceptable limits. Do not replace RDM for NVH issue.
- [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.
- [W84](/bulletins/10230242.md), 2023-01-17, Service bulletin: POWER TRAIN. Customer Satisfaction Notification W84 Powertrain Software Update
- [S2021000004](/bulletins/10229310.md), 2023-01-09, Service bulletin: POWER TRAIN; STRUCTURE. Valve Body Learn Procedure On WiTech Shows The Transmission Is Not In The Proper Gear After Repairs
- [2104517](/bulletins/10224938.md), 2022-10-31, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module \(TCM\) with the latest available software. Customers may experience the following:Immediate Autostart after Autostop \(without releasing the brake pedal\).
- [W20](/bulletins/10224601.md), 2022-10-24, Service bulletin: POWER TRAIN. Powertrain Control Module.
- [S1908000102](/bulletins/10224022.md), 2022-10-17, Service bulletin: POWER TRAIN. \(Rev. A\) Power Inverter Load Ratings
- [9003753](/bulletins/10223718.md), 2022-10-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM. Powertrain Control Module Customer may experience a MIL\-on condition with a P0607 \- ECU INTERNAL PERFORMANCE fault in the Powertrain Control Module \(PCM\). This fault may occur due to a software anomaly and a combination of actions taken by the driver. DO NOT REPLACE THE PCM AT THIS TIME. Please erase the fault and return the vehicle to the customer. A resolution for this condition is under development.
- [9003615](/bulletins/10223711.md), 2022-10-17, Service bulletin: AIR BAGS; ELECTRICAL SYSTEM; POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Electronic Shifter Module \(ESM\) Special Notes below from previous Techtips; NOTE 1: If mismatch between shifter NIK and PRNDM occur, it may appear that the PRNDM will not light up the first time the shifter is woken up via CAN. Please wait 2 minutes 15 seconds for the PRNDM lights to come back on. This is due to a software update feature of the Shifter lower \(04670682A$\). During PRNDM software update, the shifter will not be functional. NOTE 2: If Shifter is awake on CAN while disconnecting PRNDM from Shifter \(04670682A$\), U114C\-00 will activate. This is by design and does not require replacement of PRNDM. NOTE 3: PRNDM supply Voltage from Shifter will be deactivated after 3 seconds if PRNDM is disconnected from Shifter while Shifter is awake via CAN and U114C\-00 will activate. Power to Shifter will have to be removed for approx.. 20 seconds after PRNDM is connected to reset power to PRNDM from the Shifter. Power can be reset by removing battery power or disconnecting the shifter main connector. This is due to a safety feature built into the Shifter that will cut power to the PRNDM if a communication error is observed between the Shifter and PRNDM. NOTE 4: If Shifter is not responsive after Dead Battery condition, Charge Battery, and once complete disconnect battery terminals for 30 seconds and reconnect. Check Shifter functionality. Please return parts back to FCA Engineering if PRNDM is deemed non\-functional after performing this TECHtip. \~
- [2103417](/bulletins/10223675.md), 2022-10-17, Service bulletin: POWER TRAIN. Flash: Transmission Diagnostic and Shift Enhancements AN\-M4\-21\-20170721

JSON: [/v1/bulletins/10138913](/v1/bulletins/10138913)

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