NUMBER:

08-094-21

GROUP:

08 - Electrical

DATE:

May 25, 2021

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.

SUBJECT:
UKA and UKG Radio Enhancements
OVERVIEW:
This bulletin involves updating the radio software level to 1848.35.
MODELS:
2019 - 2020

(JL)

Jeep Wrangler

2018 - 2020

(WK)

Jeep Grand Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: APAC (China
Only).
NOTE: This bulletin applies to vehicles equipped with one of the following radios:
• Uconnect 3 with 5” Display (Sales Code UKA).
• Uconnect 4 with 7” Display (Sales Code UKG).
SYMPTOM/CONDITION:
Customers may experience one or more of the following:
• Radio display screen flickers.
• Clock loses 6 seconds per day (2019 JL with UKA).
• Radio resets with RPM less than 1000 RPM (2020 JL with UKG and 3.0L Diesel - EXJ).
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
Diagnostic Trouble Codes (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 the symptom/condition listed above perform the Repair Procedure.

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REPAIR PROCEDURE:
NOTE: An 8 GB USB flash drive is required for this update. It is also recommended to use a
quality, name brand (KingstonT) flash drive over a generic USB flash drive.
1. Has a 8 GB USB flash drive been created?
• YES >>> Proceed to Step 11.
• NO >>> Proceed to Step 2.
2. Perform the following steps to format the USB flash drive (Fig. 1) .
a. Select “FAT32” format.
b. Select “Default allocation size” under Allocation Unit Size.
c. Select “Quick Format” under Format Options.
d. Click “Start”.

Fig. 1
Formatting The USB Flash Drive

3. Go to DealerCONNECT>Service>Uconnect Command Center>Uconnect>More Information
>Dealer software downloads to download the files.

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4. If a security message appears “Do you want to view only the web page content that was
delivered securely?” (Fig. 2) . Press “No” to continue.

Fig. 2
Pop-Up Security Message

NOTE: If the software cannot be downloaded, make sure you have proper security access. If
not, have the Service Manager or Shop Foreman download the software update.
5. Use a blank USB flash drive with at least 8 GB of space. Follow the on-screen instructions to
download the software files.
6. Download the software update file to your local PC’s desktop. Make sure to select the “MAC”
radial button for all downloads (Fig. 3) .

Fig. 3
MAC Download Steps

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7. Be sure to download the file to your PC’s desktop and open it (Fig. 4) .
NOTE: The USB should only contain a folder labeled “18000000” on it after files are
extracted to it.

Fig. 4
Extracted File

8. Extract the downloaded file to the USB flash drive (Fig. 5) .
NOTE: It may take a few minutes for an accurate extract time to be displayed.

Fig. 5
Extract File To USB

9. Once the file is extracted to the USB flash drive flash drive, it is recommended to label the USB
flash drive with the bulletin number and proper radio Sales Code.
CAUTION! Eject the USB flash drive properly from your PC. Failure to eject the USB flash
drive properly may result in an improper file byte size and cause the update to
not fully download.

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10. Perform the following steps to properly eject the USB flash drive (Fig. 6) :
a. Right click on the location of the USB flash drive.
b. Click “Eject” to avoid data corruption.
c. Remove the USB flash drive from the PC.

Fig. 6
Ejecting The USB Flash Drive

NOTE: Verify the vehicle fuel level is at least 1/8 of a tank. If not, add fuel as required. If
necessary, take vehicle out of ship mode and enter customer mode.
11. Shut off all remaining accessories for the duration of the update (flashers, climate controls,
etc.).
12. Wait for the radio to fully power on and initialize. Ensure all splash, partner logo, animation,
disclaimer and main screens have loaded, before starting the software update.
CAUTION! Ensure no other device is plugged into any of the USB ports while performing
this update. If other devices are connected to the USB ports during the update, it
may cause failure of files to be loaded. Failure to do so may cause the radio to
need replacement.
NOTE: The engine must be running and radio powered on during the update. Failure to do
so may result in the radio not being updated and create connectivity issues. DO NOT
remove the USB flash drive during the update.
13. Start the vehicle and insert the USB flash drive into the USB port.
14. Wait for the software update pop-up window to appear on the screen.
NOTE: There can be more than one older current software level depending on vehicle/
radio manufacture time of build.
15. Verify the screen states the following: 9Current: 18XX.XX Update to: 1848.35 Approx time: 30
minutes9. Is the radio current software level at or higher than 1848.35?
• YES >>> The radio software is already up to date. Press “Cancel” to exit. Normal diagnostics
should be performed.
• NO >>> The radio software needs to be updated. Proceed to Step 16.
NOTE: During the first 30 seconds of the software update, the current software is erased.
The radio will then re-boot and re-start to begin the update of the software. Many
software partitions are displayed on the screen during the update process.

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16. Press “Yes” to start the update. The software update takes approximately 30 minutes to
complete (Fig. 7) .

Fig. 7
Update Ready to Install

17. Did the update fail after insertion of the USB flash drive into the USB port?
• YES >>> Proceed to Step 18.
• NO >>> Proceed to Step 20.
18. Leave the USB flash drive inserted in the USB port and perform the following:
NOTE: If the vehicle is equipped with Engine Stop/Start (ESS), make sure to disconnect the
main 12V battery and the auxiliary 12V battery.
19. Shut the vehicle off and perform the following:
a. Disconnect the battery(ies).
b. Wait two minutes to ensure a full power down sequence.
c. Connect the battery(ies) and re-start the update procedure at Step 12.
NOTE: Do not remove the USB flash drive before you are instructed to (Fig. 8) .

Fig. 8
Do Not Remove USB Flash Drive

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20. Wait for the 9Radio was successfully updated9 screen (Fig. 9) .

Fig. 9
Update Successful Screen

21. Wait until radio resets and audio is heard before removing the USB flash drive!
22. Verify the software version is 1848.35 by re-inserting the USB flash drive into the USB port.
Did the Software Update pop-up again, displaying the following: 9Current: 1848.35 Update to:
1848.35 Update not available to same software version9?
• YES >>> The software update is complete, press “Cancel” then remove the USB flash drive
from the USB port.
• NO >>> Verify the file sizes on the USB flash drive to ensure they are correct and then
attempt the update again. Re-start at Step 12.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
18-60-02-DL

18-60-02-DM

Description

Skill Category

Amount

Radio, Software - Create USB
Jump Drive From Uconnect Website (One Time Only)
(0 - Introduction)
Radio, Check Software Level and
Perform Software Update
(0 - Introduction)

6 - Electrical and Body Sys- 0.3 Hrs.
tems

6 - Electrical and Body Sys- 0.5 Hrs.
tems

NOTE: The “One Time Only” LOP is used one time per dealer when downloading the
software onto a USB flash drive. The dealer can only use the download LOP, one
time for each of the radios listed.

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FAILURE CODE:
The dealer must use failure code CC with this Service Bulletin.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the 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 Service Bulletin flash/reprogramming conditions.
CC

Customer Concern