Technical Service Bulletin (TSB)
Flash: Integrated Dual Charge Module (IDCM) Updates
REFERENCE:

TSB: 08-055-26
GROUP: 08 - Electrical

Date:

February 11, 2026

VEHICLES
AFFECTED:

2025 (WL) Jeep Grand Cherokee / Grand Cherokee L
This bulletin applies to vehicles equipped with a 2.0L I4 DOHC DI
Turbo PHEV Engine (Sales Code ECX).

REVISION: —

MARKET APPLICABILITY:
NA

IAP

EE

MEA

SA

CH

NOTE: This bulletin applies
to the North America,
South America,
Enlarged Europe and
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):
● B22A9-42 - ECU Internal Performance-General Memory Failure.
● B22A9-64 - ECU Internal Performance - Signal Plausibility Failure.
● B22A9-16 - ECU Internal Performance - Circuit Voltage Below Threshold.
● B22A9-17 - ECU Internal Performance - Circuit Voltage Above Threshold.
● B22A9-19 - ECU Internal Performance - Overcurrent.
Customers may also comment on the following:
● The vehicle will not charge.

CAUSE:

IDCM software

REPAIR SUMMARY:
This bulletin involves reprogramming the IDCM with the latest available software.
CLAIMS DATA:

Labor Operation No:
18-90-16-9M

Failure Code

Labor Description
Integrated Dual Charge
Module (IDCM) Reprogram
(0 - Introduction)
CC

Skill Category
6 - Electrical and Body
Systems

Customer Concern

Labor Time
0.3 Hrs.

M08 FSAR-TSB-6836

-2-

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.
RELATED TIME ALLOWANCE:

Labor Operation No:
18-19-87-52

Labor Description
wiTECH Routine to
Disable/Enable HV
Battery Contactors for
Service; Includes 5
Minute Waiting Period
(0 - Introduction)

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.2 Hrs.

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: The vehicle must not be connected to a high voltage charger when performing software
updates.
NOTE: Install a battery charger to maintain a 12 volt system voltage.

-3-

M08 FSAR-TSB-6836

NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
NOTE: Additional module flashes are required for this update to be effective, the following modules
are all to be updated along with this IDCM update:
● Battery Pack Control Module (BPCM).
● Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as
the Power Inverter Module (PIM).
● Transmission Control Module (TCM).
● Powertrain Control Module (PCM).
1. Disable HV Battery Contactors using wiTECH - Go to the Misc Functions tab --> Select Disable HV Battery
Contactors --> then follow the wiTECH prompts.
2. 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.
3. Reprogram the IDCM 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.
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. 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. Verify the vehicle will charge.
7. Does the vehicle charge properly after the software flash?
● YES >>> This bulletin has been completed. No further action is required.
● NO >>> Proceed to Step 8.
8. The IDCM will need to be replaced under normal warranty. Refer to the detailed service procedures
available in DealerCONNECT> Service Library under: Service Info>08 - Electrical / 8E - Electronic Control
Modules / Module, Integrated Dual Charging (IDCM) / Removal and Installation.
NOTE: The new IDCM will not have to be programmed, it will already have the latest software
installed.
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.