NUMBER:
GROUP:
DATE:

18-012-15
Vehicle Performance
February 06, 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.

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:
Flash: 6.7L Diagnostic And System Improvements
OVERVIEW:
This bulletin involves reprogramming the Engine Control Module (ECM) with the latest
available software.
MODELS:
2015

(DD)

Ram 3500 Cab Chassis

2015

(DP)

Ram 4500/5500 Cab Chassis

NOTE: This bulletin applies to vehicles built on or before February 6, 2015 (MDH
0206XX) equipped with a 6.7L Cummins Diesel engine (Sales code ETK).
SYMPTOM/CONDITION:
Several software improvements are available for vehicles equipped with a Cummins 6.7L
turbo diesel.
Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination
When No Defect Is Present For The Following Diagnostic Trouble Codes (DTCs):
•
•
•

U3017 - Control Module Timer/Clock Performance.
U1421 - Implausible Ignition Key Off Time Received.
P2281 - Air Leak Between MAF And Throttle Body.

Other Software Improvements:
•
•
•
•

Fuel Filter Minder calibration changes.
wiTECH Fuel Pressure Override and Fuel System Run Up test improvements.
EGR system improvement to help prevent freeze up.
Diesel Exhaust Fluid (DEF) system enhancement during stationary regeneration.

18-012-15

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DIAGNOSIS:
Using a Scan Tool with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all vehicle systems are functioning as designed. If DTCs or other
conditions are present, other than the ones listed above, record them 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 any of the DTCs
listed above, perform the Repair Procedure.
REPAIR PROCEDURE:
NOTE: If you receive a message at the conclusion of the download stating the that
the flash was not successful, the message may be erroneous. If there is an
error message after the flash has completed, first confirm that the DTC U1601
is not present and that the P/N has been updated. If so, start the engine to
confirm the flash was successful. If DTC U1601 is present, OR the P/N did not
update, OR the engine did not start, the flash may have been unsuccessful.
Restart the flash update.
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 ECM 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. After reprogramming, turn the ignition off to power down the ECM. The key must
remain off for a minimum of 75 seconds.
3. Clear any DTCs that may have been set in any modules due to reprogramming. The
wiTECH application will automatically present all DTCs after the flash and allow the
tech to clear them.
4. Perform the PCM Configuration routine in wiTECH located in the PCM “Misc
Functions” menu tab.

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18-012-15

POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
18-19-04-BN

Description

Skill Category

Module, Engine
10 - DIESEL
Control/Powertrain Control
(ECM/PCM) (Manual Trans/Aisin)Reprogram
(0 - Introduction)

Amount
0.4 Hrs.

NOTE: The expected completion time for the flash download portion of this
procedure is approximately 14 minutes. Actual flash download times may be
affected by vehicle connection and network capabilities.
FAILURE CODE:
FM

Flash Module