Technical Service Bulletin (TSB)
Flash: Powertrain Control Module (PCM) Updates
REFERENCE:

TSB: 18-040-24
GROUP: 18 - Vehicle Performance

Date:

May 2, 2024

REVISION: 18-154-22 REV. B

VEHICLES
AFFECTED:

2023 (JT) Jeep Gladiator
MARKET APPLICABILITY:
This bulletin applies to vehicles built on or before **December 06, 2023
MEA
NA
(MDH 1206XX)** with a 3.6L V6 VVT Engine Upgrade 1 (Sales Code
SA
IAP
ERC).
EE

**CH**

CUSTOMER
SYMPTOM:

**Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set the following Diagnostic Trouble Code (DTC):**
● P0300 - Multiple Cylinder Misfire.

CAUSE:

PCM Software

This bulletin supersedes Technical Service Bulletin (TSB) 18-154-22 REV. B, date of issue December
03, 2022, which should be removed from your files. All revisions are highlighted with **asterisks** and
include an updated build date, Customer Symptom statement, Repair Procedure step, added China
market and LOP.
This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 22-228,
date of issue November 24, 2022. All applicable 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.
REPAIR SUMMARY:
This bulletin involves reprogramming the PCM with the latest available software.
CLAIMS DATA:

Labor Operation No:
**18-19-06-HX

Failure Code

Labor Description
Module, Powertrain
Control (PCM) Reprogram
(0 - Introduction)
CC

Skill Category
1 - Engine Repair And
Performance

Labor Time
0.3 Hrs.**

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.
SPECIAL TOOLS/EQUIPMENT:

Description
wiTECH or Equivalent

Ref. No.
–

Notes
–

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. **If issues arise when flashing a module using the
wiTECH Diagnostic Application, please submit a ticket to the Helpdesk. The helpdesk can be found within
the Help menu.**
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.
3. Using wiTECH perform “Cam Crank Relearn” routine. This routine can be found in PCM “Misc Functions”.
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.