18-049-22

NUMBER:
GROUP:
DATE:
18-049-22 REV. A
18 - Vehicle Performance
May 11, 2022
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 18-049-22, dated March 11, 2022, which should be
removed from your files. All revisions are highlighted with **asterisks** and include
additional symptom/condition and LOP.
This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update
(RSU) 20-054, date of issue August 28, 2020. All applicable Sold and Un-Sold RSU VINs have
been loaded. To verify this RSU service action is applicable to the vehicle, use VIP or
perform a VIN search in DealerCONNECT/Service Library. All repairs are reimbursable within
the provisions of warranty. This RSU will expire 18 months after the date of issue.
SUBJECT:
Flash: Powertrain Control Module (PCM) Updates
OVERVIEW:
This bulletin involves reprogramming the PCM with the latest available software.
MODELS:
2020
(JL)
Jeep Wrangler
NOTE: This bulletin applies to vehicles within the following markets/countries: North
America, APAC, EMEA and LATAM.
NOTE: This bulletin applies to vehicles equipped with a 3.6L V6 24V VVT Engine Up Grade I
W/ESS (Sales Code ERC).
SYMPTOM/CONDITION:
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find the following (DTC):
• P0441- EVAP Purge System Performance.
The customer may comment on one or more of the following:
• ** Pinging/detonation sound from the engine after warm up at 1000-1500 RPM at low speed.**
• Abnormal Engine noise heard periodically.
NOTE: This noise is caused by Variable Valve Timing (VVT) cleaning cycle.
• A misfire condition with no Malfunction Indicator Lamp (MIL) illumination or Diagnostic Trouble
Codes (DTCs) set.
In addition, the following software enhancements are available:
• Updates to include misfire DTCs.
18-049-22 REV. A
-2-
DIAGNOSIS:
Using a Scan Tool (wiTECH 2) with the appropriate Diagnostic Procedures available in
DealerCONNECT/Service Library, verify all related systems are functioning as designed. If any
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 2 Diagnostic Application are available by selecting the application’s “HELP”
tab.
2. Clear all DTCs that may have been set in any module due to reprogramming. The wiTECH 2
application will automatically present all DTCs after the flash and allow them to be cleared.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
Description
Skill Category
Amount
**18-19-06-G6
Module, Powertrain Control (PCM) Inspect and Reprogram
(0 - Introduction)
1 - Engine Repair 0.3 Hrs.**
and Performance
NOTE: The expected completion time for the flash download portion of this procedure is
approximately 6 minutes. Actual flash download times may be affected by vehicle
connection and network capabilities.
FAILURE CODE:
The dealer must use failure code CC with this Technical Service Bulletin.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the Technical
Service Bulletin, failure code CC is to be used.
• When utilizing this failure code, the 3C’s (customer’s concern, cause and correction) must be
provided for processing Technical Service Bulletin flash/reprogramming conditions.
CC
Customer Concern