NUMBER:
GROUP:
DATE:

18-029-14
Vehicle Performance
April 11, 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: MIL Illumination. Includes Powertrain System Improvements/Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
MODELS:
2014

(JK)

Wrangler

NOTE: This bulletin applies to vehicles equipped with a 3.6L engine (sales code
ERB) built on or before February 17, 2014 (MDH 0217XX).
SYMPTOM/CONDITION:
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation the Technician may find that the following
Diagnostic Trouble Codes have been set:
•
•

P2097- Downstream Fuel Trim System 1 Rich
P2099- Downstream Fuel Trim System 2 Rich

The following powertrain system improvements/enhancements are also included in this
software release:
•

Corrected a generic scan tool display issue regarding Mode 6 data accuracy.

Updating the PCM software will correct the conditions listed above.
DIAGNOSIS:
Using a Scan Tool (wiTECH) and the appropriate Diagnostic Procedures available in
TechCONNECT, verify all engine systems are functioning as designed. If DTC's other than
the one listed above are present, record them on the repair order and repair as necessary
before proceeding further with this bulletin.

18-029-14

-2-

If the customer describes the symptom/condition or if the technician finds the DTCs,
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. Follow the detailed service procedures
available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical >
Electronic Control Modules - Service Information > Module - Powertrain Control >
Standard Procedures > PCM/ECM Programming.
2. After PCM reprogramming, the following must be performed: clear any DTC's that
may have been set in other modules due to reprogramming. The wiTECH application
will automatically present all DTCs after the flash and allow the tech to clear them.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
18-19-06-9E

Description
Module, Powertrain Control (PCM) Reprogram (1 - Semi-Skilled)

Skill Category
8 - Engine
Performance

Amount
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