Release Date

Technical Service Bulletin

08/30/2022

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)

Applicable Vehicles

Country

Beginning Model Year

Ending Model Year

Vehicle

Vehicle Count

USA
CAN

2022
2022

2022
2022

TAOS
TAOS

17,654
671

Revision History
Revision

Date

Purpose

1

December 09, 2021

Original publication
Updated battery charger requirements
Updated SVM code and removed workaround steps for P0606 fault
Updated claiming instructions


Claims with a repair date on or after August 30, 2022 must use
the revised labor operations found in the revised circular
published to ELSA and ServiceNet.



Claims with a repair date prior to August 30, 2022 must be
entered using the original labor operations (see Dealer Letter)

August 30, 2022

2

NOTE: the updated software version should prevent the P0606 with
symptom code 32902 from setting during the software flash process

Condition/Technical Background
This Update has been released proactively to prevent certain DTCs stored in the ECM Fault Memory, and also
includes additional improvements to vehicle diagnostics and drivability.
Criteria

Technical Background
This update has been proactively released to prevent the following DTCs stored in ECM Fault Memory:

01



P2421 - EVAP emission system evaporative valve stuck open



P013E - Oxygen sensor delay response



P2025 - EVAP fuel vapor temperature sensor performance



P0169 - Incorrect fuel composition



P30C0 - Fuel Quality poor



P0606 (with symptom code 32903) - ECM/PCM Processor



P060C (with symptom code 30935) - ECU performance



P290C - Crankcase Oil Separator Underspeed



U01C3 - Lost Communication With Crankcase Oil Separator

Included in the software update are additional performance improvements to address the following:


Customer may experience engine torque variations in the 1200 to 2000 engine rpm range with
bad fuel

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures are
not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Volkswagen dealer. 2022 Volkswagen of America, Inc. All Rights Reserved.
August, 2022

24HV Page 1 of 14

Release Date

08/30/2022

Technical Service Bulletin

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)


Dissatisfaction with the drive-off behavior



Rough idling due to early camshaft positions (especially in hot ambient temperatures)



The engine temperature could unexpectedly rise into high ranges due to the radiator cooling fan
not sufficiently being commanded under hot ambient air conditions (high intake air and coolant
temperature)



Prolonged engine cranking is noticed around -10°C

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures are
not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Volkswagen dealer. 2022 Volkswagen of America, Inc. All Rights Reserved.
August, 2022

24HV Page 2 of 14

Release Date

08/30/2022

Technical Service Bulletin

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)

Remedy
Criteria
01

Remedy
Update engine control module software

This Update is in effect until removed.
Vehicle must meet all of the following criteria:
 Procedure is valid only for vehicles that show the 24HV code in the ELSA Campaign/Action Information screen
on the day of repair.
 Vehicle must be within the Federal Emissions Warranty.
 Procedure must be performed within the allotted time frame stated in this Technical Service Bulletin.
 Procedure must be performed on applicable vehicles in dealer inventory prior to sale.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures are
not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Volkswagen dealer. 2022 Volkswagen of America, Inc. All Rights Reserved.
August, 2022

24HV Page 3 of 14

Release Date

08/30/2022

Technical Service Bulletin

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)

Service
NOTE:


ELSA is the only valid inquiry/verification source. Check ELSA on the day this vehicle UPDATE will be
performed to verify vehicle eligibility for the UPDATE. Status must show “open”. Attach an ELSA printout
showing the “open” status to the repair order.



If this UPDATE appears to have already been performed but the code still shows open in ELSA, contact
Warranty before proceeding further. Another dealer may have recently performed this UPDATE but not
yet entered a claim for it in the system.



ELSA may also show additional open action(s); if so, inform your customer - this work can be done while
the vehicle is in for this UPDATE.



Contact the Warranty Helpline (U.S.) or the Warranty Campaign Specialist (Canada) if you have any
questions.



Enter the VIN in ELSA and proceed to the
“Campaign/Action” screen.

TIP
On the date of repair, print this screen and keep a
copy with the repair order.


Confirm the Campaign/Action is open . If the status is closed, no further work is
required.



Note the Applicable Criteria ID for
use in determining the correct work to be done
and corresponding parts associated.
CRITICAL REPAIR STEP

STOP!
If multiple software update Campaign/Actions are
open, they must be performed in order of the Start
date . The oldest should be performed
first.


All Safety Recalls must be completed prior
to completing this campaign.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures are
not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Volkswagen dealer. 2022 Volkswagen of America, Inc. All Rights Reserved.
August, 2022

24HV Page 4 of 14

08/30/2022

Release Date

Technical Service Bulletin

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)
NOTE
Prior to launching the VAS Diagnostic Tester and starting an update, ensure the following conditions are met;
The ODIS software is completely up to date.


Refer to the “Alerts” section on ServiceNet home page for the current ODIS version.

The battery charger is connected to the vehicle battery and remains connected for the duration
of the software update.


Battery voltage must remain above 12.5 volts for the duration of the software update. Failure
to do so may cause the update to fail, which could result in damage to the control module.
Control modules damaged by insufficient voltage will not be covered.

The screen saver and power saving settings are off.


Failure to do so may result in the tester entering power save mode during the software
update, which could result in damage to the control module.

The VAS Diagnostic Tester is plugged in using the supplied power adapters.


Under no circumstances should the tester be used on battery power alone during the
software update. Failure to do so may result in the tester powering off during the update,
which could result in damage to the control module.

The VAS Diagnostics Interface MUST ONLY be connected to the tester with a USB cable.


Performing a software update using a Bluetooth or WiFi connection increases the risk of
losing connection during the update, which could result in damage to the control module.
It also greatly increases the time required to perform the update. Requests for additional time
or parts will be denied if the GFF log shows the update was performed using Bluetooth or
WiFi.

WARNING
Radiator Fan(s) may cycle ON high speed during the Update Process! There is a serious risk that personal injury
may result if contact is made with spinning fan blades. Keep hands and all objects away from Radiator Fan(s)
during Update Process!
TIP
To Update-Programming using SVM, review and follow instructions in Technical Bulletin 2014603: Software
Version Management (SVM) Operating Instructions.
The SVM Process must be completed in its entirety so the database receives the update confirmation response.
A warranty claim may not be reimbursed if there is no confirmation response to support the claim.
TIP
As a best practice, customer presets should be documented prior to performing any update in the event these
settings are lost during the update.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures are
not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Volkswagen dealer. 2022 Volkswagen of America, Inc. All Rights Reserved.
August, 2022

24HV Page 5 of 14

Release Date

08/30/2022

Technical Service Bulletin

24HV UPDATE
Engine Control Module Software Update – (FED_EMS)
NOTE


Damages resulting from improper repair or failure to follow these work instructions are the dealer’s
responsibility and are not eligible for reimbursement under this action.



Diagnosis and repair of pre-existing conditions in the vehicle are not covered under this action.

NOTE


All campaign software updates must be completed during a single, standalone ODIS Diagnostic Session.
You must fully complete this campaign and send all logs before beginning any other campaigns or
operations.



If there are any ODIS “Hot-Fix” patches installed, they must be removed from the scan tool before
beginning this operation. ODIS “Hot-Fix” patches may affect the update process.


Open the hood.



Open the battery cover.



Switch the ignition on.



Apply the parking brake.



Switch off all consumers (headlights, heated
seats, climate control, etc.).



Connect the VAS6150X/VAS6160X Diagnostic
Tester to the vehicle.



Start the ODIS program.



Attach a Battery Tester/Charger capable of
minimum 70 Amp continuous supply.
NOTE

Vehicles with Battery Monitoring Control Module
-J367- and/or an EFB Battery:
When connecting the charger to the battery, connect
the positive cable to the positive terminal of the
battery and connect the negative cable to the
grounding lug on the chassis. DO NOT connect the
ground cable directly to negative terminal of the
battery.