Technical Service Bulletin (TSB)
Flash: Radio Frequency Hub Module (RFHM) Updates
REFERENCE:

TSB: 08-095-23
GROUP 08 - Electrical

VEHICLES
AFFECTED:

2021 (WK) Jeep Grand Cherokee
This bulletin applies to vehicles equipped with:
• 6.2L Supercharged HEMI V8 SRT Engine (Sales Code ESD)
with Keyless Enter-N-Go (Sales Code GX4).
• 6.4L V8 SRT HEMI MDS Engine (Sales Code ESG) with Keyless
Enter-N-Go (Sales Code GX4).

Date:

April 14, 2023

REVISION: –
MARKET APPLICABILITY:
HNA
□MEA
□SA

□IAP

□EE

□CH

CUSTOMER
SYMPTOM:

The customer may describe that they heard about these vehicles that can be unlawfully driven away by
thieves when they are able to program new key fobs through the RFHM.
Software enhancement include:
• Update to the RFHM software to prevent hackers from programming their own key fob to the
vehicle.
• This is intended to deter an unwanted drive off of the vehicle without the customers knowledge.

CAUSE:

RFHM Software.

This bulletin involves reprogramming the RFHM with the latest software available.
CLAIMS DATA:
Labor Operation No:

Labor Description

Skill Category

Labor Time

18-Y8-41-82

Module, Radio Frequency Hub (RFHM) Reprogram
(0 - Introduction)

6 - Electrical and Body
Systems

0.2 Hrs.

Failure code

CC

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 requests the anti-theft enhancement, perform the repair procedure.
WARNING! Performing this RFHM update will prevent additional key fob programming and this must
be communicated to the customer before performing this RFHM update. If additional keys
are required by the customer after this RFHM update is performed the replacement of
the RFHM is required and must be at a previous SW level.
SPECIAL TOOLS/EQUIPMENT:
Description

Ref. No.

Notes

wiTECH or Equivalent

–

–

08-095-23

-2-

REPAIR PROCEDURE:
NOTE: Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not
allow the charging voltage to climb above 13.5 volts during the flash process.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. Reprogram the RFHM with the latest software. Detailed instructions for flashing control modules using
the wiTECH Diagnostic Application are available by selecting the application’ ”HELP” tab.
2. 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.
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.