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

Transaction No.: 2071535/4

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 – 2025

All

All

All

All

ID.Buzz

2025

All

All

All

All

Revision Table
Instance Number

Published Date

Version Number

Reason For Update

2071535/4

3/10/25

93-23-08

Updated with ID.Buzz and new
model year applicability, and
content updates.

2071535/3

9/3/24

93-23-08

Updated description of test plan.

2071535/2

12/7/23

93-23-08

Clarified location and description
of test plan. Updated BHQ
information.

2071535/1

11/06/23

93-23-08

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).

CAUTION
If there are relevant 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.

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 age-related reduction of the battery capacity is normal.

Production Solution
Not applicable.

Service
NOTICE
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 units (TU)

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

Output

Direction decision, no decimal
value in %

Decimal value in %

Decimal value in %

Measuring
tolerance

± 10 percentage points

± 1-2 percentage points

± 10 percentage points (without
qualified measured value)
± 5 percentage points (with qualified
measured value)

Warranty
Accounting
Options

Warranty with justified customer
complaint

Warranty with justified customer complaint
OR
Customer pay (non-warranty)

Only used for customer pay (nonwarranty)

NOTICE
Note: For e-Golf vehicles, “sedan” must be chosen and not “wagon” when selecting vehicle options at the start of GFF
diagnosis, to ensure that the correct test plans are visible.

NOTICE
These three test plans are part of a singular test, “determine the residual energy content of the high-voltage battery”,
which can be found within Guided Fault Finding (GFF) under the following path:
– > Test plan
– > Select self-test
– > 008C – Determine the residual energy content of the high-voltage battery

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), either of the following test plans may be used to check the remaining battery capacity of the highvoltage battery:
•

Battery Health QuickTest (BHQ)

•

Battery Health Certificate (BHC)

CAUTION
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:

NOTICE
Note the information in the to this bulletin. The customer can positively influence the test procedure by
properly pre-conditioning the high-voltage battery according to the instructions within. By performing this pre-conditioning,

a qualified measured value can be generated, which can improve the measuring tolerance. 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. This information can be provided to the customer in advance of the workshop visit.

1. Carry out the “Battery Health Status” (BHS) portion of the “determine the residual energy content of the high-voltage battery” 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
“O.K.” 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 “No“ 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 “Yes” 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 the residual energy content of the high-voltage battery” 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 high-voltage 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.

CAUTION
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):
•

Carry out either the “Battery Health Quick Test” (BHQ) or the “Battery Health Certificate” (BHC) portion of the “determine the residual
energy content of the high-voltage battery” test plan through Guided Fault Finding (GFF).

Warranty
CAUTION
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 high-voltage 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.

NOTICE
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 without a range
complaint, 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 – 2025

All

All

All

All

ID.Buzz

2025

All

All

All

All

SAGA Coding
Claim Type:

Use applicable Claim Type

1)

Service Number:

Damage
Code

HST

Damage Location (Depends
on Service No.)

9303

0039

--

--

e-Golf, ID.Buzz, MY21-24 ID.4

WWO 2)

MY25 I.D.4

VOA

Parts Manufacturer

For BHS Test:
Labor Operation 3 ) :
Battery charge

27068950 = see Elsa for latest time units

For BHC Test (only if long measurement required according to BHS results):
Labor Operation 3 ) :
High voltage battery check

93030100 = see Elsa for latest time units

Labor Operation 3 ) :
Diagnose high-voltage battery

93050599 = 50 TU

Causal Part:

01500060
Diagnostic Time

4)

GFF Time expenditure

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

YES

Road Test

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

NO

01320000 = 00 TU max.

NO

Technical Diagnosis

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.

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

© 2025 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 | 03.03.2025

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 and/or through
the use of high-voltage consumers (e.g. A/C or heat).
• 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