1807623

Technical Service Bulletin (TSB)
Flash: Powertrain Control Module (PCM) Updates
REFERENCE:
TSB: 18-076-23
GROUP 18 - Vehicle Performance
VEHICLES
AFFECTED:
2018 (WK) Jeep Grand Cherokee
This bulletin applies to vehicles equipped with 3.6L V6 24V VVT
Engine UPG I W/ESS (Sales Code ERC).
CUSTOMER
SYMPTOM:
Date:
June 24, 2023
REVISION: 18-093-19
MARKET APPLICABILITY:
HNA
HMEA
HSA
HIAP
HEE
□CH
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation
the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set:
• **P0441 - EVAP Purge System Performance.**
• P0456 - EVAP System Small Leak.
NOTE: If DTC P0456 is present use the wiTECH Small Leak Verification test (SLVT) to determine if a
leak is present in the system.
• P06EF - Engine Restart Performance.
CAUSE:
PCM Software
This bulletin supersedes Technical Service Bulletin (TSB) 18-093-19, date of issue November 06,
2019, which should be removed from your files. All revisions are highlighted with **asterisks** and
include additional Diagnostic Trouble Code (DTC) and LOP.
REPAIR SUMMARY:
This bulletin involves reprogramming the PCM with the latest available software.
CLAIMS DATA:
Labor Operation No:
Labor Description
Skill Category
Labor Time
**18-19-06-HD
Module, Powertrain Control (PCM) - Reprogram
(0 - Introduction)
1 - Engine Repair And
Performance
0.3 Hrs.**
Failure code
CC
Customer Concern
The dealer must use failure code CC with this Technical Service Bulletin.
• If the customer’s concern matches the SYMPTOM 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.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in DealerCONNECT/
Service Library, verify all related 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 any of the symptoms listed above in the customer symptom section, perform the
Repair Procedure.
18-076-23
-2-
SPECIAL TOOLS/EQUIPMENT:
Description
Ref. No.
Notes
wiTECH or Equivalent
–
–
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 available software. Detailed instructions for flashing control modules
using the wiTECH 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 application
will automatically present all DTCs after the flash and allow them to be cleared.
POLICY:
Reimbursable within the provisions of the warranty.
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.