2020 Dodge or Ram Truck Grand Caravan Technical Service Bulletin # 21-012-12B Date: 121129

A/T, Engine Controls - A/T Shift Improvements

NUMBER: 21-012-12 REV. B

GROUP: Transmission and Transfer Case

DATE: November 29, 2012

**THIS SERVICE BULLETIN IS ALSO BEING RELEASED AS RAPID RESPONSE

TRANSMITTAL (RRT) 12-069. ALL APPLICABLE UN-SOLD RRT VIN's HAVE BEEN

LOADED. TO VERIFY THAT THIS RRT SERVICE ACTION IS APPLICABLE TO THE

UN-SOLD VEHICLE, USE VIP OR PERFORM A VIN SEARCH IN TECHCONNECT. FOR

VEHICLES NOT INCLUDED IN THE RRT VIN LIST, APPLICATION OF THIS SERVICE

BULLETIN TO SOLD UNITS IS BASED UPON THE CUSTOMER EXPERIENCING THE

SYMPTOM/CONDITIONS. ALL REPAIRS ARE REIMBURSABLE WITHIN THE

PROVISIONS OF WARRANTY.**

THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-012-12 REV. A, DATED

NOVEMBER 3, 2012, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS

BULLETIN IS NOW BEING RELEASED AS A RAPID RESPONSE TRANSMITTAL. THE

ONLY CHANGES TO THIS BULLETIN IS THE ADDITION OF THE RAPID RESPONSE

TRANSMITTAL STATEMENT. ALL REVISIONS ARE HIGHLIGHTED WITH

**ASTERISKS**.

HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS

AVAILABLE BY SELECTING "HELP" THEN "HELP CONTENTS" AT THE TOP OF

THE wiTECH DIAGNOSTIC APPLICATION WINDOW.

THE wiTECH SOFTWARE LEVEL MUST BE AT RELEASE 13.01 OR HIGHER TO

PERFORM THIS PROCEDURE.

SUBJECT:

Flash: Transmission Shift Quality Improvements

OVERVIEW:

This bulletin involves flash reprogramming the Powertrain Control Module (PCM) with new software.

NOTE:

There may be two software packages to choose from. Both software updates will fix all symptoms/conditions listed. Refer to Service Bulletin

21-008-12 for details about the software choices.

MODELS:

2011 - 2013 RT Caravan/Town & Country

NOTE:

This Service Bulletin applies to vehicles built with 3.6L engine (sales code ERB) and a 6 speed automatic transmission (sales code DG2) built

before September 26, 2012 (MDH 0926XX).

SYMPTOM/CONDITION:

Some customers may notice any of the following:

^ Harsh 1-3 upshift while operating in Economy (ECO) mode.

^ Harsh 2-3 upshift while operating in normal mode.

NOTE:

For 2012 model year, the harsh 1-3 upshift in Economy Mode and the harsh 2-3 upshift in Normal Mode was corrected in the revised software

enhancements that were released in Service Bulletin 21-008-12 dated March 23, 2012.

^ 1-2 upshift clunk following a throttle back out (2012 - 2013 model year only).

In addition to correcting the previous Symptom/Conditions, the following enhancements have been made to improve the shift quality of the 62TE

transmission:

^ Shift schedule changes for the 1-2, 3-4, 4-5, and 5-6 upshifts and the 6-4P, 6-5, and 5-4 downshifts.

2020 Dodge or Ram Truck Grand Caravan V6-3.6L Page 2

^ Fifth gear torque converter lock-up/unlock improvements.

DIAGNOSIS:

Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify no Diagnostic Trouble Codes

(DTC's) are set. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.

If the customer describes the symptom, perform the Repair Procedure.

PARTS REQUIRED:

REPAIR PROCEDURE:

NOTE:

Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts

during the flash process.

NOTE:

If this flash process is interrupted/aborted, the flash should be restarted.

1. Reprogram the PCM with the latest software. Help using the wiTECH diagnostic application for flashing an ECU is available by selecting "help"

then "help contents" at the top of the wiTECH diagnostic application window.

2. After PCM reprogramming,Clear any DTC's that may have been set in other modules due to reprogramming. The wiTECH application will

automatically present all DTCs after the flash and allow the tech to clear them.

3. Using wiTECH clear the Variable Line Pressure (VLP) Counters, found in the Misc Function menu for the PCM ECU.

4. Using wiTECH perform the Quick Learn function, found in the Misc Function menu for the PCM ECU.

5. Type the necessary information on the "Authorized Modification Label" and attach it near the VECI label.

POLICY:

Reimbursable within the provisions of the warranty.