21-006-15 REVA

NUMBER:
21-006-15 REV. A
GROUP:
Transmission and
Transfer Case
DATE:
April 03, 2015
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 FCA US LLC.
THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-006-15, DATED JANUARY 30,
2015, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE
HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE ADDITIONAL SYMPTOMS AND
NEW LABOR OPS.
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 **15.04** OR HIGHER TO PERFORM
THIS PROCEDURE.
SUBJECT:
Flash: 845RE Transmission Shift Enhancements
OVERVIEW:
This bulletin involves reprogramming the Transmission Control Module (TCM) with the
latest available software.
MODELS:
2015
(LA)
Dodge Challenger
NOTE: This bulletin applies to vehicles built on or before March 09, 2015 (MDH
0309XX) equipped with a 3.6L engine (sales code ERB) and equipped with an
845RE automatic transmission (sales code DFL).
SYMPTOM/CONDITION:
A small number of customers may experience one or more of the following concerns.
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**Malfunction Indicator Lamp (MIL) illumination with Diagnostic Trouble Code (DTC)
P0734 - Gear 4 Shift Incorrect Ratio set in the TCM memory.**
**Harsh or erratic 8-6 downshift during freeway driving.**
**Harsh or erratic 6-4 and/or 6-3 downshift during city driving.**
**Harsh or erratic upshifts while in Sport Mode.**
Less than desired downshift timing (longer time to downshift than expected).
Less than desired downshift feel during coasting decelerations and while passing.
Less than desired shift feel when shifting from reverse to drive or drive to reverse
while the vehicle is stationary (i.e. garage shift).
Less than desired upshift feel during normal non-aggressive driving.
21-006-15 REV. A
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Less than desired powertrain performance at higher altitudes.
Less than desired paddle shifter operation.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all vehicle systems are functioning as designed. If DTCs or
symptom conditions, other than the ones listed above are present, record the issues on the
repair order and repair as necessary before proceeding further with this bulletin.
If the customer describes the symptom/condition or if the technician finds the DTC listed
above, 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 available software. Detailed instructions for
flashing control modules using the wiTECH Diagnostic Application are available by
selecting the “HELP” tab on the 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 all DTCs that may have been set in any module due to reprogramming. The
wiTECH application will automatically present all DTCs after the flash and allow them
to be cleared.
NOTE: Do not clear the adaptation memory cells in the TCM’s memory. Clearing the
memory cells may cause the transmission to not shift smoothly until they
can be fully relearned.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
**18-19-05-AM**
Description
Skill Category
Module, Transmission Control (TCM) - 2- Automatic
Reprogram
Transmission
(0 - Introduction)
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
affected by vehicle connection and network capabilities.
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21-006-15 REV. A
FAILURE CODE:
The dealer must choose which failure code to use. If the customer came in with an
issue and the dealer found updated software to correct that issue, use failure code
CC, for all other use failure code RF.
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If the customer’s concern matches the SYMPTOM/CONDITION identified in the
Service Bulletin, than failure code CC is to be used.
If an available flash is completed while addressing a different customer concern,
failure code RF is to be used.
CC
Customer Concern
RF
Routine Flash