Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

Condition
Applicable Vehicles
Model(s)

Year

Eng. Code

Trans. Code

VIN Range From

VIN Range To

e-Golf

2015 – 2019

All

All

All

All

ID.4

2021 – 2024

All

All

All

All

Revision Table
Instance Number

Published Date

Version Number

2071535/1

11/06/23

93-23-08

Reason For Update
Original publication.

Customer Concern:
 Reduced electric vehicle range.
or
 The customer is requesting information on the State of Health (SOH) of the high-voltage battery (e.g.,
in order to sell the vehicle).
Workshop Findings:
 The customer concern can be reproduced.
 No relevant DTCs (active/static) indicating concerns with the high-voltage battery are present in the
Hybrid battery management -J840- (diagnostic address 008C).

If there are DTCs (active/static) present in the Hybrid battery management -J840- (diagnostic
address 008C), then this bulletin does not apply! The appropriate Guided Fault Finding (GFF)
test plan(s) should be followed and resolved before any determination of the remaining battery
capacity is performed.

Page 1 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

Technical Background
Through normal usage over time, the high-voltage batteries of electric vehicles are subject to various
aging effects, which could lead to a reduction of the overall battery capacity (energy density). This agerelated reduction of the battery capacity is normal.

Production Solution
Not applicable.

Service

If a range complaint is presented by the customer, Technical Service Bulletin 2071494 should be
reviewed before carrying out the procedures outlined below.

To determine the remaining battery capacity of the high-voltage battery, there are three different test
plans available in Guided Fault Finding (GFF).

The significant differences of the test plans are explained in the following table:
Battery Health
Status (BHS)

Battery Health Certificate
(BHC)

Battery Health
Quicktest (BHQ)

Duration

About 25 to 50 time About 50 time units (TU) of
units (TU)
productive tester time. Total
duration up to 750 time units
(TU)

About 25 to 50 time
units (TU)

Output

Direction decision, Decimal value in %
no decimal value in
%

Decimal value in %

Measuring
tolerance

± 10 percentage
points

± 1-2 percentage points

± 10 percentage
points

Warranty
Accounting
Options

Warranty with
justified customer
complaint

Warranty with justified customer Only used for
complaint
customer pay (nonwarranty)
OR
Customer pay (non-warranty)

Page 2 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

These three test plans are part of a singular test, “determine battery capacity status”, which can
be found within Guided Fault Finding (GFF) under the following path:
 > 008C – hybrid battery management
 > battery management functions
 > determine battery capacity status
To be covered under warranty, only the following test plans may be used for the check of the remaining
battery capacity of the high-voltage battery:
1. Battery Health Status (BHS) – Required.
2. Battery Health Certificate (BHC) – Only as necessary based on BHS results.
At the customer’s request (non-warranty), the following test plans can be used to check the remaining
battery capacity of the high-voltage battery:
 Battery Health Quickest (BHQ)
 Battery Health Certificate (BHC)

Checking the remaining battery capacity of the high-voltage battery at the customer’s request
(e.g. without a warrantable customer complaint) is not covered under warranty policy!

To check the remaining battery capacity of the high-voltage battery as part of the warranty:

Note the information in the to this bulletin. Within this document, the information
on the respective test plan to be performed should be provided to the customer in advance. The
customer can positively influence the test procedure by properly pre-conditioning the highvoltage battery according to the instructions within. In the case of the long measurement, if
required, they can also significantly reduce the duration of a workshop visit, due to the required
battery discharge at the start of the check.

Page 3 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

1. Carry out the “Battery Health Status” (BHS) portion of the “determine battery capacity status” test plan
through Guided Fault Finding (GFF).
 IMPORTANT: Save a copy of the test plan result screen in “.pdf” format by using the “print” function in
GFF. This printed result may be required for documentation through warranty!


“Battery capacity ≥ 70 %”: If the result of the remaining battery capacity check is equal to or greater
than 70%, it will be indicated by an “X” in this section (there is no decimal value output).

 “Long measurement recommended”: If the GFF test plan recommends no further testing, it will be
symbolized by a “-“ in this section. In this case the high-voltage battery remaining capacity is OK in the
sense of warranty; do not perform any further actions from this bulletin.
 “Long measurement recommended”: If the GFF test plan recommends a longer measurement to
determine the remaining battery capacity, it will be symbolized with an “X” in this section. In this case
the BHS test was not sufficient to determine if the vehicle is above or below the warranty limit;
therefore proceed to step 2.
2. If the long measurement was recommended by the BHS test in step 1, then carry out the “Battery
Health Certificate” (BHC) portion of the “determine battery capacity status” test plan through Guided Fault
Finding (GFF).
 IMPORTANT: Save a copy of the test plan result screen in “.pdf” format by using the “print” function in
GFF. This printed result may be required for documentation through warranty!
 There is an output of a decimal percentage value of the remaining battery capacity.
 If the result of the remaining battery capacity check is equal to or greater than 70%, then the highvoltage battery is OK in the sense of warranty; do not perform any further actions from this bulletin.
 If the result of the remaining battery capacity check is less than 70%, check the warranty conditions
applicable to the vehicle to determine whether a warranty case applies. If there is an applicable
warranty of the high-voltage battery, proceed to step 3.
3. If the remaining battery capacity was determined to be less than 70% by the BHC test in step 2, then
contact the Volkswagen Group TAC for next steps.
 Provide the complete GFF log as well as the “.pdf” copies of both the BHS test and the BHC test when
opening a TAC ticket.
 The appropriate warranty repair direction will be provided through the TAC ticket.

The high-voltage battery cannot be replaced under warranty without first contacting the
Volkswagen Group TAC as outlined in this document!

To check the remaining battery capacity of the high-voltage battery as part of the customer’s
request (not covered under warranty):

Page 4 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

 Carry out either the “Battery Health Quick Test” (BHQ) or the “Battery Health Certificate” (BHC) portion
of the “determine battery capacity status” test plan through Guided Fault Finding (GFF).

Warranty

The warranty information within this document only pertains to the testing required to determine
the remaining capacity of the high-voltage battery! Any repairs to and replacement of the highvoltage battery, as determined through contact with the Volkswagen Group TAC, are outside the
scope of this document. Please see the repair manual for any labor operations and special tools
that may be required.

Only the “Battery Health Status (BHS)” and “Battery Health Certificate (BHC)” checks can be
claimed via warranty with a justified customer complaint. For checking the remaining battery
capacity at the customer’s request, and for the “Battery Health Quicktest (BHQ)”, no warranty
applies.

To determine if this procedure is covered under Warranty, always refer to the Warranty Policies
and Procedures Manual 1)
Model(s)

Year(s)

Eng. Code(s)

Trans. Code(s)

VIN Range
From

VIN Range To

e-Golf

2015 – 2019

All

All

All

All

ID.4

2021 – 2024

All

All

All

All

SAGA Coding
Claim Type:

Service Number:

Use applicable Claim Type 1)
Damage

9303
Parts Manufacturer

Code
0039

HST

Damage Location
(Depends on Service
No.)

--

--

e-Golf, ID.4

WWO 2)

Page 5 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

For BHS Test:
Labor Operation 3) :

27068950 = see Elsa for latest time units

Battery charge
For BHC Test (only if long measurement required according to BHS results):
Labor Operation 3) :

93030100 = see Elsa for latest time units

High voltage battery check
Labor Operation 3) :

93050599 = 50 TU

Diagnose high-voltage battery

01500060

Causal Part:

Diagnostic Time 4)
GFF Time expenditure

01500060 = Actual GFF print out
(up to 50 TU max)

Road Test

01210002 = see Elsa for latest
time units
01210004 = see Elsa for latest
time units

Technical Diagnosis

01320000 = 00 TU max.

YES

NO

NO

Claim Comment: Input “As per Technical Bulletin 2071535” in comment section of Warranty Claim.
1)

Vehicle may be outside any Warranty in which case this Technical Bulletin is informational only.

2)

Code per warranty vendor code policy.

3)

Labor Time Units (TUs) are subject to change with ELSA updates.

4)

Documentation required per Warranty Policies and Procedures Manual.

Page 6 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Service Bulletin

93-23-08 - Determination of HV-Battery Health, Remaining Capacity

Transaction No:

2071535/1

Release date:

11/06/2023

Required Parts and Tools
Tool Description

Tool No:

VAS Diagnostic Tool

VAS 6150/X & VAS 6160/X with
ODIS Service with current online updates

VAS Battery Tester / Charger

VAS 5908

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.

Page 7 of 7 Plus attachment
© 2023 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and
other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Public

Customer Information
Pre-conditioning of the high-voltage battery before
determining the remaining high-voltage battery capacity

VWGoA | 31.10.2023

Supplementary Information for TSB 2071535

Public

Pre-conditioning of the high-voltage battery for:
Battery Health Quicktest (BHQ) or Battery Health Status (BHS)
• The temperature of the high-voltage battery must be greater than 10°C / 50°F (outside
temperature greater than 5°C / 41°F).
• Discharge the high-voltage battery by driving to as low a charge level as possible. A charge level
below 10% is ideal.
• Lock the vehicle.
• Wait for 60 minutes.
− The key must be kept at least 20 yards away from the vehicle for a full 60 minutes!
• Charge the high-voltage battery to a charge level of at least 90% (within a single charging cycle).
• Wait for 60 minutes.
− The key must be kept at least 20 yards away from the vehicle for a full 60 minutes!
• Drive the vehicle to your VW dealer to perform the BHQ or BHS test.

Supplementary Information for TSB 2071535

Public

Pre-conditioning of the high-voltage battery for:
Battery Health Certificate (BHC)
• The BHC test has specific requirements to begin – bringing the vehicle to the following
conditions ahead of the test will shorten the time required at your VW dealer:
• The charge level of the vehicle’s high-voltage battery must be below 10%. The
charge level can be reduced through normal driving of the vehicle.
• The temperature of the high-voltage battery must be greater than 10°C / 50°F
(outside temperature greater than 5°C / 41°F). At low outside temperatures, the
vehicle may need to be acclimated inside the dealer workshop to achieve this
condition.
• At low outside temperatures, if possible, do not park the vehicle outside before the
dealership visit.

Supplementary Information for TSB 2071535