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

TSB: 08-010-24
GROUP: 08 - Electrical

Date:

January 9, 2024

REVISION: -

VEHICLES
AFFECTED:

2024 (WL) Jeep Grand Cherokee/Grand Cherokee L
MARKET APPLICABILITY:
This bulletin applies to vehicles built on or before September 28, 2023
IAP
NA
(MDH 0928XX) equipped with the 2.0L I4 DOHC DI Turbo PHEV Engine
EE
MEA
(Sales Code ECX).
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:
● P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed.
● P0AA1-00 - Hybrid/EV Battery Positive Contactor “A” Stuck Closed.
Customers may also experience the following:
● The vehicle will not start.

CAUSE:

BPCM software.

REPAIR SUMMARY:
This bulletin involves updating the BPCM with the latest available software.
CLAIMS DATA:
Labor Operation No:
18-19-87-9Z

Failure Code

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

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.2 Hrs.

Customer Concern

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.

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 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:
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. 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 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. Enable HV Battery Contactors using wiTECH - Go to the Misc Functions tab --> Select Enable HV Battery
Contactors For Service--> then follow the wiTECH prompts.
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.