Technical Service Bulletin (TSB)
Flash: Electronic Vehicle Control Unit (EVCU) Updates 6A2
REFERENCE:

TSB: 08-207-25 REV. A
GROUP: 08 - Electrical

Date:

July 10, 2025

REVISION: 08-207-25

VEHICLES
AFFECTED:

2025 (KM) Jeep Wagoneer S
MARKET APPLICABILITY:
This bulletin applies to vehicles built on or before April 05, 2025 (MDH
MEA
NA
0405XX) equipped with 400V G2500 FR/RR Elec Drive Motors (Sales
SA
IAP
Code ELD).
EE

CH

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

Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may
exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
● C10FA-00 - Wheel Hub disconnect Actuator Performance Left.
● C10FB-00 - Wheel Hub disconnect Actuator Performance Right.
Customers may also comment on the following:
● Wrench icon is illuminated on the Instrument Panel Cluster (IPC).

CAUSE:

EVCU software update

This bulletin supersedes Technical Service Bulletin (TSB) 08-207-25, date of issue July 02, 2025, which
should be removed from your files. All revisions are highlighted with **asterisks** and include an
updated Repair Procedure.
REPAIR SUMMARY:
This bulletin involves reprogramming the EVCU with the latest available software and performing a Wheel End
Disconnect Position Learn routine.

J08 FSAR-TSB-5901

-2-

CLAIMS DATA:

Labor Operation No:
18-19-85-BS

Failure Code

Labor Description
Unit, Electric Vehicle
Control (EVCU) Reprogram
(0 - Introduction)
CC

Skill Category
6 - Electrical and Body
Systems

Labor Time
0.7 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
–

-3-

J08 FSAR-TSB-5901

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).
● The vehicle must not be connected to a high voltage charger when performing software updates.
NOTE: ● Install a 12 volt battery charger to ensure sufficient battery voltage which can also support
50-60 amps during the flash process.
● The remote battery posts (jump posts) under the hood may be used to connect a 12 volt
battery charger to eliminate the need to remove the battery.
● If this flash process is interrupted/aborted, the flash should be restarted.
CAUTION!
● To lower the risk of failure modes prior to the flash update, do not open trunk, frunk or passenger
door without first opening the driver door before performing this Repair Procedure. This process
will not need to be performed after the flash update has been completed.
● Minimize on-site vehicle movements and ignition cycles where possible before performing this
Repair Procedure.
● If the vehicle has recently been driven, on a test drive for example, the vehicle needs to sit and cool
down for one hour before performing this update. Failure to allow the vehicle to cool down may
result in substantial consequential damage to occur. Pulling the vehicle into the bay does not justify
the one hour cool down.
1. **Reprogram the EVCU 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. Can the ignition be turned off?
● YES >>> Proceed to Step 4.
● NO >>> Proceed to Step 3.
3. Disconnect the 12 volt battery charger and the 12 volt battery for 15 seconds.
4. Clear DTCs.
5. ls DTC P167B-00 - Controlled System Shutdown now active in the BPCM?
● YES>>> Proceed to Step 6.
● NO>>> Proceed to Step 7.
6. Using wiTECH, perform a "Impact Event Fault Reset" routine. This routine is located in the 'Misc Functions'
menu for the BPCM.
7. Allow the vehicle to go to sleep. This will take approximately six minutes then proceed to Step 8.
NOTE: For the six-minute sleep cycle to be successful, the micropod must be disconnected
and the ignition must be set to OFF prior to starting the sleep cycle. Additionally, all
accessories, lights and electrical units must be turned off, and hood, trunk and all doors
must be closed with no one inside the vehicle. During this sleep cycle, the vehicle may
present IPC warnings, chimes and other DTCs.

8. Using wiTECH, perform a "Wheel End Disconnect Position Learn" routine. This routine is located in
the ’Misc Functions’ menu for the EVCU.
NOTE: If the Wheel End Disconnect Position Learn routine is not successful, roll the vehicle
slightly forward so that the wheel end disconnect actuators can align on the spline before
attempting to perform the routine again.
9. Clear any DTCs that may have been set in any modules 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.