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

TSB: 08-063-26
GROUP: 08 - Electrical

Date:

February 12, 2026

VEHICLES
AFFECTED:

2024 (WL) Jeep Grand Cherokee/Grand Cherokee L
This bulletin applies to vehicles equipped with the 2.0L I4 DOHC DI
Turbo PHEV Engine (Sales Code ECX).

REVISION: 08-008-25

MARKET APPLICABILITY:
NA

IAP

SA

MEA

EE

CH

NOTE: **This bulletin applies
to North and South
America, Enlarged
Europe, Middle East &
Africa, India & Asia
Pacific markets**.
CUSTOMER
SYMPTOM:

Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must
exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
● **P0607-00 - ECU Internal Performance.
● P0C78-00 - Hybrid/EV Battery System Precharge Time Too Long.
● P0CA6-00 - Hybrid/EV Battery Charging Current High.**
● P0B24-00 - Hybrid/EV Battery "A" Voltage Unstable.
● P1C5E-00 - Hybrid/EV Battery State Of Health Failed.
● P0BBE-00 - Hybrid/EV Battery Pack Voltage Variation.
● P0DAB-00 - Hybrid/EV Cell Balancing Performance.
● P0D0F-00 - Hybrid/ EV Battery Negative Contactor “A” Stuck Closed.
● P0AA1-00 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed.
● P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.
Customers may also experience one or more of the following:
● **Vehicle does not start.**
NOTE: **The no start condition is accompanied with one or more of the following DTCs:
P0DAB-00, P0607-00, P0AA1-00, P0AA4-00, P0C78-00, P0CA6-00, P0B24-00, P1C5E-00
and/or P0BBE-00. P0BBE-00 and P0B28-00 will result in a MIL for 49 days. After 49 days of
the MIL, the vehicle will no longer be allowed to start.**
● Low 12V battery causing vehicle not to start.

CAUSE:

BPCM software.

This bulletin supersedes Technical Service Bulletin (TSB) 08-008-25, date of issue January 14, 2025,
which should be removed from your files. All revisions are highlighted with **asterisks** and include
new DTCs, new Customer Symptom, new Customer Symptom note, new Market Applicability note, new
LOP and an updated Repair Procedure with a new Repair Procedure note.
REPAIR SUMMARY:
This bulletin involves updating the BPCM with the latest available software.

J08 FSAR-TSB-6990

-2-

CLAIMS DATA:

Labor Operation No:
**18-19-87-SA

Failure Code

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

Skill Category
6 - Electrical And Body
Systems

Labor Time
0.6 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:
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.

-3-

J08 FSAR-TSB-6990

1. **Has the 68C recall instruction been completed?
● YES >>> Proceed to Step 2.
● NO >>> Follow the 68C Recall Instructions and utilize the LOPs contained within the Recall.
2. Disable HV Battery Contactors using wiTECH - Go to the Misc Functions tab --> Select Disable HV Battery
Contactors --> then follow the wiTECH prompts.
3. Use wiTECH to confirm that the contactors are open and waiting five minutes. If the contactors do not
open turn the ignition on then off. Once successful a note will appear on the wiTECH screen indicating the
contactors are open.
4. Reprogram the BPCM with the latest 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.
5. Enable HV Battery Contactors using wiTECH - Go to the Misc Functions tab --> Select Enable HV Battery
Contactors For Service--> then follow the wiTECH prompts.
6. 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.**
NOTE: **For SA market only, after applying this TSB, it is not necessary to send DID-I or DID-A.**
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.