NUMBER:
GROUP:
DATE:

18-008-14
Vehicle Performance
February 15, 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 14.02 OR HIGHER TO
PERFORM THIS PROCEDURE.
SUBJECT:
Flash: MIL Illumination P0300- Multiple Cylinder Misfire and/or P0573- Brake Switch 1
Stuck Off
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
MODELS:
2014

(WK)

Grand Cherokee

2014

(WD)

Durango

NOTE: This bulletin applies to vehicles equipped with a 3.0L engine (sales code
EHD) built on or before January 21, 2014 (MDH 0121XX), a 3.6L engine (sales
code ERB) built on or before January 7, 2014 (MDH 0107XX) or a 5.7L engine
(sales code EZH) built on or before January 15, 2014 (MDH 0115XX).
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:
•
•

P0300 - Multiple Cylinder Misfire (only applies to 5.7L engines)
P0573 - Brake Switch 1 Stuck Off

DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all engine systems are functioning as designed. If DTC's other than
the ones listed above are present 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 the DTC’s,

18-008-14

-2-

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. 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. 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-Y8

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 15 minutes. Actual flash download times may be
affected by vehicle connection and network capabilities.
FAILURE CODE:
FM

Flash Module