21-023-14

Service Bulletin Details

Public Details for: 21-023-14

Flash: transmission shift enhancements this bulletin involves flash reprogramming of the transmission control module (tcm) with new software. The following transmission control module (tcm) calibration improvements are available for veh


- 2014 -

Models from 2014
2014 JEEP WRANGLER
NUMBER:
GROUP:
DATE:
21-023-14
Transmission and
Transfer Case
July 18, 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 SERVICE BULLETIN IS ALSO BEING RELEASED AS RAPID RESPONSE
TRANSMITTAL (RRT) 14-053. ALL APPLICABLE SOLD AND UN-SOLD RRT VIN's
HAVE BEEN LOADED. TO VERIFY THAT THIS RRT SERVICE ACTION IS
APPLICABLE TO THE VEHICLE, USE VIP OR PERFORM A VIN SEARCH IN
TECHCONNECT. ALL REPAIRS ARE REIMBURSABLE WITHIN THE PROVISIONS OF
WARRANTY.
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 14.03 OR HIGHER TO
PERFORM THIS PROCEDURE.
SUBJECT:
Flash: Transmission Shift Enhancements
OVERVIEW:
This bulletin involves flash reprogramming of the Transmission Control Module (TCM) with
new software.
MODELS:
2014
JK
Wrangler
NOTE: This bulletin applies to vehicles built on before May 25, 2014 (MDH 0525XX)
equipped with an automatic transmission (Sales Code DGJ).
NOTE: The software in TCM part number 05150891AC may allow an initialization
error on 4X4 vehicles causing the customer concern. TCM part number
05150891AC can still be used on 2014 model year Challengers without
concern.
21-023-14
-2-
SYMPTOM/CONDITION:
The following Transmission Control Module (TCM) calibration improvements are available
for vehicles equipped with WA580 Automatic Transmission (Sales Code DGJ).
3.6L Wrangler
•
Transmission shifting does not meet customers expectation while towing a loaded
trailer in high ambients (>32°C/90°F).
• Poor performance and/or poor powertrain response when trying to accelerate from
speeds >48 kph (30 mph) - Japan/Taiwan/China vehicles only.
• Delayed Drive to Reverse shift engagement when the transfer case is in Low Range
(4LO) - Rubicon Only.
2.8L Wrangler
•
•
•
•
•
•
Transmission shifts inconsistently (gear hunting) when driving up/down steep hills or
when towing a trailer.
Delayed Drive to Reverse shift engagement when the transfer case is in Low Range
(4LO)
Transmission shifting while accelerating from a stop does not meet customers
expectation.
Poor vehicle performance in Drive
Poor vehicle performance in Auto Stick Mode.
Delayed upshifts and/or poor shift quality during acceleration from a stop when the
transfer case is in Low Range (4LO) - Rubicon Only.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all TCM systems are functioning as designed. If DTC's are present,
record them on the repair order and repair as necessary before proceeding further with this
bulletin.
If a customer’s VIN is listed in VIP or your RRT VIN list, perform the repair. For all other
customers that describe the symptom/condition, perform the Repair Procedure.
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 TCM 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. Clear any DTC's that may have been set in other modules due to reprogramming. The
wiTECH™ application will automatically present all DTC’s after the flash and allow the
tech to clear them.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
Description
Skill Category
Amount
-3-
21-023-14
No:
18-19-05-B9
Module, Transmission Control (TCM) - 2 - Automatic
Inspect and/or Reflash
Transmission
(1 - Semi Skilled)
0.2 Hrs.
NOTE: The expected completion time for the flash download portion of this
procedure is approximately 5 minutes. Actual flash download times may be
affected by vehicle connection and network capabilities.
FAILURE CODE:
FM
Flash Module


© dot.report 2024

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.