NUMBER:
GROUP:
DATE:

24-005-21
24 - Heating and Air
Conditioning
May 12, 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.

This Technical Service Bulletin (TSB) has also been released as a Rapid Response
Transmittal (RRT) 21-058, date of issue May 12, 2021. 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. This RRT will expire 18 months after the date of issue.
SUBJECT:
Flash: Heating, Ventilation and Air Conditioning (HVAC) Module Updates
OVERVIEW:
This bulletin involves reprogramming the HVAC control module with the latest available software.
MODELS:
2021

(GA)

Alfa Romeo Giulia

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America.
NOTE: This bulletin applies to vehicles built on or before November 06, 2020 (MDH 1106XX).
SYMPTOM/CONDITION:
The customer may experience a Malfunction Indicator Lamp (MIL) illumination with the following
Diagnostic Trouble Code (DTC) or the symptom/conditions listed below:
• B10C8-36 - Cabin Fan Brushless - Signal Frequency Too Low.
• The HVAC fan stops working after a Engine Start/Stop (ESS) function.
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 RRT VIN list, perform the repair. If any vehicle not on the
VIN list exhibits the symptom/condition or DTC, perform the inspection.

24-005-21

-2-

1. Is the vehicle on the RRT VIN list?
• YES>>> Proceed to Step 2 of the Inspection Procedure.
• NO>>> Proceed to Step 1 of the Repair Procedure.
2. Does the HVAC control module have the latest software already installed?
• YES>>> This bulletin has been completed, use inspect LOP (18-50-10-9Z) to close the
active RRT.
• NO>>> Proceed to Step 1 of the Repair Procedure.
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 HVAC control module with the latest software. Detailed instructions for flashing
control modules using the wiTECH Diagnostic Application are available by selecting the
application’s “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.
TIME ALLOWANCE:
Labor Operation
No:
18-50-10-9Z
18-50-10-9Y

Description

Skill Category

Amount

Module, HVAC Control - Inspect
(0 - Introduction)
Module, HVAC Control - Inspect
and Reprogram
(0 - Introduction)

7 - Air Conditioning and
Heating
7 - Air Conditioning and
Heating

0.2 Hrs.
0.2 Hrs.

NOTE: The expected completion time for the flash download portion of this procedure is
approximately 3 minutes. Actual flash download times may be affected by vehicle
connection and network capabilities.
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
CC

Required Flash - RRT
Customer Concern

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24-005-21