Technical Service Bulletin (TSB)
Flash: Battery Pack Control Module
(BPCM) Diagnostic and System Updates
REFERENCE:

TSB: 08-250-23
GROUP: 08 - Electrical

Date:

November 21, 2023

VEHICLES
AFFECTED:

2024 (JL) Jeep Wrangler
This bulletin applies to vehicles built on or before August 08, 2023
(MDH 0808XX) equipped with the 2.0L I4 DOHC DI Turbo PHEV Engine
(Sales Code ECX).

REVISION: -

MARKET APPLICABILITY:
NA

IAP

EE

MEA

SA

CH

CUSTOMER
SYMPTOM:

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:
• P0607-00 - ECU Internal Performance.
• P0C78-00 - Hybrid/EV Battery System Precharge Time Too Long.

CAUSE:

BPCM software.

This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 23-322,
date of issue November 21, 2023. 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. This RSU will expire 18 months after the
date of issue.
REPAIR SUMMARY:
This bulletin involves updating the BPCM with the latest available software.
NOTE: Additional module flashes are required for this update to be effective, the following modules
are all to be updated along with this BPCM update:
• Powertrain Control Module (PCM).
• Integrated Dual Charging Module (IDCM).
• Transmission Control Module (TCM).
• Battery Pack Control Module (BPCM).
• Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as
the Power Inverter Module (PIM).
CLAIMS DATA:
Labor Operation No:
18-19-87-AA

18-19-87-AB

Failure Code

Labor Description
Battery Pack Control
Module (BPCM), Inspect
(0 - Introduction)
Battery Pack Control
Module (BPCM), Inspect
and Reprogram
(0 - Introduction)
RF
CC

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.2 Hrs.

6 - Electrical and Body
Systems

0.3 Hrs.

Required Flash
Customer Concern

M08 FSAR-RSU-3324

-2-

The dealer must choose which failure code to use depending on if this is a Rapid Service Update
(RSU) or Technical Service Bulletin.
• The “RF” failure code is required for essential module flash/reprogramming and can only be used after
confirmation that the VIN is included on the RSU.
• The failure code “RF” (Required Flash) can no longer be used on Technical Service Bulletin flashes. The
“RF” failure code must be used on an RSU.
• 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 must be supplied.
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 a customer’s VIN is listed in VIP or your RSU VIN list, perform the repair. If any vehicle not on the VIN list
exhibits the DTCs, perform the repair.
SPECIAL TOOLS/EQUIPMENT:
Description
wiTECH or Equivalent

Ref. No.
–

Notes
–

REPAIR PROCEDURE:
NOTE: The IDCM, PCM, HCP/AHCP and TCM must be updated to the latest available software at
the conclusion of this repair procedure. Refer to all applicable published technical service
bulletins for detailed repair procedures and labor times regarding updating the IDCM, PCM,
HCP/AHCP and TCM software.
CAUTION!
Failure to update the IDCM, PCM, HCP/AHCP and TCM module following an BCPM software update
may result in vehicle malfunctions.
WARNING!
• Before performing the software reprogramming, it is necessary to make the vehicle safe.
• When performing repairs that directly involve or imply possible contact with live high voltage
components/systems, the technician must ensure that the power supply of the high-voltage system
is disconnected throughout the operation.
• Only specifically trained technicians qualified to perform repairs on vehicles with high voltage
systems under current national laws/regulations are authorized to work on the vehicle.
• Before performing any diagnostic repair work on the vehicle, carefully read and comply with
the general instructions for working safely on hybrid/electric vehicles and use suitable general
equipment and Personal Protective Equipment (PPE).
NOTE: Install a battery charger to maintain a 12 volt system voltage.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. Is the vehicle on the RSU VIN list?
• YES >>> Proceed to Step 2.
• NO >>> Proceed to Step 3.
2. Does the BPCM have the latest software already installed?
• YES >>> This bulletin has been completed, use inspect LOP (18-19-87-AA) to close the active RSU.

-3-

M08 FSAR-RSU-3324

• NO >>> Proceed to Step 3.
3. Reprogram the BPCM with the latest software. Detailed instructions for flashing control modules using the
wiTECH Diagnostic Application are available by selecting the application ”HELP” tab.
4. 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.
5. Verify the IDCM, PCM, HCP/AHCP and TCM are also programmed with the latest available software.
Refer to all applicable published service bulletins for detailed repair procedures and labor times regarding
updating the IDCM, PCM, HCP/AHCP and TCM software.
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.