18-077-15

NUMBER:
GROUP:
DATE:
18-077-15
Vehicle Performance
October 30, 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 18-071-14 DATED DECEMBER
02, 2014, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE
HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE UPDATED SOFTWARE
REQUIREMENT, BUILD DATES, SYMPTOMS/CONDITIONS AND 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 IS REQUIRED TO BE AT THE LATEST RELEASE
BEFORE PERFORMING THIS PROCEDURE.**
SUBJECT:
Flash: Diagnostic and System Improvements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
MODELS:
2014
(JK)
Jeep Wrangler
NOTE: **This bulletin applies to vehicles equipped with a 3.6L Engine (Sales Code
ERB) and Automatic Transmission (Sales Code DGJ).**
NOTE: **This bulletin applies to vehicles equipped with a 3.6L Engine (Sales Code
ERB) and Manual Transmission (Sales Code DEH).**
NOTE: This bulletin applies to vehicles equipped with a 3.6L engine (Sales Code
ERB) and 4.10 Rear Axle Ratio (DMF) and 4.1 Rock-Track HD Part Time 4WD
System (DHW).
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SYMPTOM/CONDITION:
**A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation the technician may find the following Diagnostic
Trouble Code (DTC) set in the PCM memory:
•
U0140 - Lost Communication With Body Control Module.
Customers may also describe one or more of the following conditions:
•
•
Less than desired shift points during Wide Open Throttle (WOT) operation.
Perceived misfire under normal acceleration.
Software update is also available for customers with vehicles equipped with Manual
Transmissions (DEH) to disable the starter protection feature for Rock Crawling.**
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all engine 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 listed above or if the technician finds the
DTC, 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 PCM with the latest 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.
NOTE: Ensure the Transmission Control Module (TCM) is updated before
proceeding to the next step.
2. Clear any DTCs that may have been set in all modules due to reprogramming. The
wiTECH application will automatically present all DTCs after the flash and allow them
to be cleared.
POLICY:
Reimbursable within the provisions of the warranty.
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18-077-15
TIME ALLOWANCE:
Labor Operation No:
**18-19-06-FD**
Description
Module, Powertrain Control
(PCM) - Reprogram
(0 - Introduction)
Skill Category
8 - Engine
Performance
Amount
0.2 Hrs.
NOTE: The expected completion time for the flash download portion of this
procedure is approximately 4 minutes. Actual flash download times may be
affected by vehicle connection and network capabilities.
FAILURE CODE:
The dealer must choose which failure code to use. If the customer came in with an
issue and if the dealer finds a software update to correct that issue, use failure code
CC, for all other use failure code RF.
•
•
If the customer’s concern matches the SYMPTOM/CONDITION identified in the
Service Bulletin, 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