# Service bulletin SB\-18\-020\-09

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: 10030936
- Published by NHTSA: 2009\-12\-23
- Manufacturer's number: SB\-18\-020\-09
- Manufacturer's date: 2009\-07\-09
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

JEEP: MIL ILLUMINATION AND/OR MDS DRIVEABILITY IMPROVEMENTS. THIS INVOLVES SELECTIVELY ERASING AND REPROGRAMMING THE POWERTRAIN CONTROL MODULE \(PCM\) WITH NEW SOFTWARE. \*PE

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Electrical system, Transmission and driveline, Automatic transmission, Software, Transmission control module

## Vehicles listed

- 2009 JEEP COMMANDER
- 2009 JEEP GRAND CHEROKEE

## Other bulletins for the same vehicles and component

- [S1709000010](/bulletins/10229031.md), 2023-01-09, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear \(roller failure\) on one or more cam lobes and that camshaft/lifter replacement is necessary.
- [21\-022\-14 REV. A](/bulletins/10141242.md), 2018-06-18, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. 4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules \(FDCM\) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. Customers may indicate that the ?Service 4WD? indicator in the instrument cluster is illuminated. They may also indicate that the transfer case will not shift from 4WD High, 4WD Low, and/or Neutral once the lamp is illuminated.Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in the Final Drive Control Modules \(FDCM\) Memory
- [21\-022\-14](/bulletins/10069323.md), 2016-06-02, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [21\-022\-14REV.A](/bulletins/10069322.md), 2016-06-02, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [21\-006\-13](/bulletins/10069242.md), 2016-06-02, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [CSN\-P\-73](/bulletins/10058278.md), 2015-08-26, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). FIAT CHRYSLER: TSB HAS AN OWNER NOTIFICATION LETTER. SELECT DOCUMENT SEARCH BUTTON BELOW. WHEN SHIFTING OUT OF CURRENT SELECTED MODE, FINAL DRIVE CONTROL MODULE \(FDCM\) SOFTWARE CAUSES SERVICE 4WD LIGHT TO ILLUMINATE AND SWITCHING OUT OF 4WD FAILS AND NEEDS REPROGRAMMING. MODEL 2005\-2010 JEEP GRAND CHEROKEE, JEEP COMMANDER. \*PE

JSON: [/v1/bulletins/10030936](/v1/bulletins/10030936)

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