21-030-14 REV. A

NUMBER:
21-030-14 REV. A
GROUP:
Transmission and
Transfer Case
DATE:
October 24, 2014
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system,
or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of Chrysler Group LLC.
THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-030-14, DATED SEPTEMBER
26, 2014 WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE
HIGHLIGHTED WITH **ASTERISKS** AND IS BEING REVISED TO INCLUDE
ADDITIONAL REPAIR STEPS.
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 VERSION MUST BE AT **15.02** OR HIGHER TO
PERFORM THIS PROCEDURE.
SUBJECT:
845RE Transmission Quick Learn Procedure
OVERVIEW:
This bulletin provides information on how to perform the new scan tool based transmission
Quick Learn procedure. This procedure is required after certain transmission repairs or to
improve a customer’s concern of poor shift quality.
MODELS:
2014 - 2015
(DS)
Ram 1500 Pickup
2014 -2015
(LD)
Charger
2014 -2015
(LX)
300C
2014 - 2015
(WD)
Durango
2014 - 2015
(WK)
Grand Cherokee
2015
(LA)
Challenger
NOTE: This bulletin applies to vehicles equipped with the 845RE (Sales Codes DFL).
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DISCUSSION:
The 845RE Automatic Transmission uses a sophisticated shift algorithm that includes
learned information so that the shift quality remains excellent even as the transmission
wears. This learned information is recorded in memory cells referred to “Adaptation
Memory Cells”. Each applied clutch records the amount of time it takes to fill the clutch
(Fast Filling Counter/Filling Time) and the amount of pressure (Filling Counter/Filling
Pressure). The adaptation memory cells are set to zero (0) on every new transmission
(new in vehicle and/or replaced for service) and when the transmission control module is
replaced for service. In addition, the adaptation memory cells are set to zero (0) when the
transmission control module adaptation memory cells are cleared using the wiTECH
diagnostic scan tool. Until the adaptation has been learned/relearned, the transmission
shift quality may not meet the customers expectations.
NOTE: Anytime the transmission has been overhauled (unless the Valve Body/TCU
assembly (mechatronic) was replaced), the adaptation memory cells must be
cleared using the wiTECH diagnostic scan tool.
The adaptation memory cells appear on the wiTECH for every clutch. Each clutch will
include:
•
•
•
•
Fast Filling Counter = the number of filling time events that has taken place
Filling Time = +/- number of ms (milliseconds) from zero (standard set value).
Filling Counter = the number of filling pressure events that has taken place
Filling Pressure = +/- mb (millibar)/PSI (Pounds Per Square Inch) from zero
(standard set value)
If the adaptation memory cell “counter” is zero (0), than the adaptation memory cell has not
been updated. The filling counter ideally should be at least 12 and Fast Filling counter at
least 4 to improve shift quality and with each subsequent count, shift quality will improve
even more.
Typical wiTECH Display of Adaptation Memory Cells
Graph
Name
Value
Unit
Type
Clutch A- Filling
Pressure
0
PSI
Sensors
Clutch A- Filling
Counter
6
Counts
Sensors
Clutch A- Filling
Time
0
ms
Sensors
Clutch A- Fast
Filling Counter
2
Counts
Sensors
Clutch B - Filling 0
Pressure
PSI
Sensors
Clutch B - Filling 6
Counter
Counts
Sensors
Clutch B - Filling 0
Time
ms
Sensors
Clutch B - Fast
Filling Counter
Counts
Sensors
2
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21-030-14 REV. A
Clutch C- Filling 1
Pressure
PSI
Sensors
Clutch C- Filling 6
Counter
Counts
Sensors
Clutch C- Filling 18
Time
ms
Sensors
Clutch C- Fast
Filling Counter
Counts
Sensors
Clutch D- Filling 1
Pressure
PSI
Sensors
Clutch D- Filling 6
Counter
Counts
Sensors
Clutch D- Filling -6
Time
ms
Sensors
Clutch D- Fast
Filling Counter
2
Counts
Sensors
Clutch E- Filling
Pressure
2
PSI
Sensors
Clutch E- Filling
Counter
6
Counts
Sensors
Clutch E- Filling
Time
2
ms
Sensors
Clutch E- Fast
Filling Counter
3
Counts
Sensors
2
SYMPTOM/CONDITION:
Customers may indicate that their transmission shift quality does not meet their
expectations.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available, verify
all vehicle systems are functioning correctly. If any DTCs are present, record them on the
repair order and repair as necessary before proceeding further with this bulletin.
If the above symptom/condition is present, perform the Repair Procedure
SPECIAL TOOLS/EQUIPMENT REQUIRED:
NPN
wiTECH VCI Pod Kit
NPN
Laptop
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REPAIR PROCEDURE:
NOTE: Transmission Quick Learn must be performed anytime the transmission is
repaired/replaced and/or the Valve Body/TCU assembly (mechatronic) is
replaced. It must also be performed when the adaptation memory cells are
cleared with the wiTECH diagnostic scan tool. Transmission Quick Learn is
also one of the first steps to improve a transmission shift quality concern on
these vehicles.
1. Are there any active DTCs in the Transmission Control Module (TCM’s) memory?
a. YES>>> Using current published service information, diagnose and repair the
conditions that set the DTC(s) before proceeding with this bulletin.
b. NO>>> Proceed to Step #2.
NOTE: 2015 model year vehicles equipped with the 845RE already contain software
in the TCM to enable the Quick Learn procedure. However, 2014 model year
vehicles require the TCM to be updated to the latest software level.
NOTE: **The Powertrain Control Module (PCM) calibration files must also be at the
latest software level to perform this procedure.**
2. Is your vehicle a 2014 model year?
a. Yes>>> Proceed to Step #3.
b. No>>> Proceed to Step #5.
3. Using wiTECH, check the TCM calibration and see if it is up to date. Does the TCM
software need to be updated?
a. Yes>>> Proceed to Step #4.
b. No>>> Proceed to Step #6.
4. Flash the TCM to the latest software level available referring to current applicable TCM
flash Service Bulletins available in Service Information. If no other bulletins apply, use
the provided LOP in this bulletin to perform the update. Proceed to Step #6.
5. ** Using wiTECH, check the PCM calibration and see if it is up to date. Does the PCM
software need to be updated?
a. Yes>>> Flash the PCM to the latest software level available. Refer to all current
applicable PCM flash Service Bulletins available in Service Information for detailed
repair procedures and labor times. Proceed to Step #6.
b. No>>> Proceed to Step #6.**
6. Start the engine and monitor the transmission temperature on the EVIC.
7. With the vehicle located in a suitable area, allow the transmission to warm up to
minimum of 55°C (131°F) by performing the following steps:
a. Apply the service brake.
b. Shift Transmission from Park to Reverse.
c. Shift Transmission from Reverse to Drive.
d. Accelerate the vehicle to minimum of 45 mph to allow the transmission to cycle
through each gear.
e. Drive the vehicle until the transmission temperature reaches 55°C (131°F).
8. Connect wiTECH diagnostic scan too to the vehicle.
9. Check for TCM DTC (Diagnostic Trouble Codes). Do not perform the Quick Learn
procedure if TCM DTCs are present. Repair transmission as required.
10. Select the TCM module in wiTECH.
11. Select the “Misc Functions” tab.
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21-030-14 REV. A
12. Select “Reset Adaptive Values” and follow the on-screen instructions to reset the
clutch adaptive values.
13. Next select the “Quick Learn” procedure, and follow the on-screen instructions to learn
new clutch adaptive values. The Quick Learn procedure will take 2-5 minutes to
complete.
14. Shift the transmission into Park and shut off the engine. The procedure is now
complete. If there is still a customer concern of poor shift quality after performing this
procedure, please perform the Transmission Adaptation Drive Learn Procedure
outlined in service bulletin 21-012-14 or later version.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
Description
Skill
Category
Amount
18-19-05-L9
Module, Transmission Control (TCM) Reprogram w/ 845RE Transmission Quick
Learn Procedure (1 - Semi-Skilled) (2014
Model Year Vehicles Only)
2- Automatic 0.5 Hrs.
Transmission
08-19-05-M9
845RE Transmission Quick Learn
Procedure
2- Automatic 0.4 Hrs.
Transmission
FAILURE CODE:
FM
Flash Module
18-19-05-L9
ZZ
Service Action
08-19-05-M9