21-014-14

NUMBER:
GROUP:
DATE:
21-014-14
Transmission and
Transfer Case
April 16, 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.
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 selectively erasing and reprogramming the Transmission Control
Module (TCM) with new software.
MODELS:
2013
2013
JK
Wrangler
LC
Challenger
2013
WO
Durango
2013
WK
Grand Cherokee
NOTE: This bulletin applies to the following vehicles:
•
Wrangler vehicles equipped with the WA580 Automatic Transmission
(Sales Code DGJ)
•
Challenger vehicles equipped with either the 3.6L engine (Sales Code
ERB) or the 6.4L Engine (Sales Code ESH or ESG) and the WA580
Automatic Transmission (Sales Code DGJ)
•
Durango vehicles equipped with the 3.6L engine (Sales Code ERB) and
the WA580 Automatic Transmission (Sales Code DGJ)
•
Grand Cherokee vehicles equipped with the 6.4L engine (Sales Code
ESG) for all markets except Australia (Sales Code SAL) or the 3.6L
engine (Sales Code ERB) (All Markets) and the WA580 Automatic
Transmission (Sales Code DGJ). Australian vehicles equipped with the
6.4L can refer to Service Bulletin 21-010-14.
SYMPTOM/CONDITION:
The following Transmission Control Module (TCM) calibration improvements are available
for vehicles equipped with WA580 Automatic Transmission (Sales Code DGJ) .
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3.6L Grand Cherokee/Durango
•
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 >58 kph (36 mph) - All Markets .
•
Poor performance and/or poor powertrain response when trying to accelerate from
speeds >48 kph (30 mph) - Japan/Taiwan/China vehicles only.
•
Transmission shifts inconsistently (gear hunting) when driving up/down steep hills or
when towing a trailer.
6.4L Grand Cherokee
•
•
Poor acceleration or performance above 113 kph (70 mph).
Transmission shifting while accelerating from a stop does not meet customers
expectation .
•
Harsh shifting during acceleration with moderate accelerator pedal and then lifting
off the accelerator pedal.
•
Cannot accelerate up a steep incline or with a loaded trailer in reverse .
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).
3.6L Challenger
•
Transmission shifting does not meet customers expectation while towing a loaded
trailer in high ambients (>32 °C/90°F).
6.4L Challenger
•
Poor acceleration or performance above 113 kph (70 mph).
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 th is
bulletin.
If the customer describes any of the symptoms , perform the Repair Procedure.
REPAIR PROCEDURE:
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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 control modules is available through the wiTECH Diagnostic
Application . For instructions select the "HELP" tab on upper portion of the wiTECH
window, then "HELP CONTENTS". This will open the Welcome to wiTECH Help
screen where help topics can be selected .
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
No:
18-19-05-9V
Description
Module, Transmission Control ModuleInspect/Reprogram (1 - Semi-Skilled)
Skill Category
Amount
0.2 Hrs.
NOTE: The expected completion time for the flash download portion of this
procedure is approximately 3 minutes. Actual flash download times may be
effected by vehicle connection and network capabilities.
FAILURE CODE:
IFlash Module