NUMBER:
GROUP:
DATE:

18-029-20 REV. A
18 - Vehicle Performance
May 19, 2020

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.

This bulletin supersedes Service Bulletin 18-029-20, dated March 27, 2020, which should be
removed from your files. All revisions are highlighted with **asterisks** and includes
converting to an RRT, additional step and LOP.
This Service Bulletin is also being released as Rapid Response Transmittal (RRT) 20-033,
dated May 19, 2020. All applicable Sold and Un-Sold RRT VINs have been loaded. To verify
this RRT service action is applicable to the vehicle, use VIP or perform a VIN search in
DealerCONNECT/Service Library. All repairs are reimbursable within the provisions of
warranty.
SUBJECT:
Flash: Powertrain Control Module (PCM) Updates
OVERVIEW:
This bulletin involves reprogramming the PCM with the latest available software.
MODELS:
2019

(FD)

FIAT 500X

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America and EMEA.
NOTE: This bulletin applies to vehicles equipped with 1.3L I4 Turbo Multi-air DI Engine
W/ESS (Sales Code EYF).
SYMPTOM/CONDITION:
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set:
• U0100 - Lost Communication With ECM/PCM.
In addition, the customer may also experience the following:
• The vehicle will not crank if the ECM gets hotter than 50 °C (122 °F).
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 one listed 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 RRT VIN list, perform the repair. If any vehicle not on
the VIN list exhibits the symptom/condition or DTC, perform the repair.**

18-029-20 REV. A

-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. **Is the vehicle on the RRT VIN list?
• YES>>> Proceed to Step 2.
• NO>>> Proceed to Step 3.
2. Does the PCM control module have the latest software already installed?
• YES>>> This bulletin has been completed, use inspect LOP (18-19-06-CF) to close the
active RRT.
• NO>>> Proceed to Step 3.**
3. Reprogram the PCM with the latest software. Detailed instructions for flashing control modules
using the wiTECH Diagnostic Application are available by selecting the application’s “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.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No:
**18-19-06-CF

Description
Module, Powertrain Control (PCM) - Inspect
(0 - Introduction)

Skill Category
Amount
1 - Engine Repair and Per- 0.2 Hrs.**
formance

18-19-06-CP

Module, Powertrain Control (PCM) - Inspect and
Reprogram
(0 - Introduction)

1 - Engine Repair and Per- 0.3 Hrs.
formance

NOTE: The expected completion time for the flash download portion of this procedure is
approximately 6 minutes. Actual flash download times may be affected by vehicle
connection and network capabilities.

-3-

18-029-20 REV. A

FAILURE CODE:
**The dealer must choose which failure code to use depending on if this is a Rapid
Response Transmittal (RRT) or Service Bulletin.
• The “RF” failure code is required for essential module flash/reprogramming and can only be
used after confirmation that the VIN is included on the RRT.
• The failure code “RF” (Required Flash) can no longer be used on Service Bulletin flashes. The
“RF” failure code must be used on an RRT.
• 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 must be
supplied.
RF

Required Flash - RRT

CC

Customer Concern**