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12 05 23_ISOLATION FAULTS SAVED IN CCU (COMBINED CHARGING UNIT)

SIB 12 05 23
ISOLATION FAULTS SAVED IN CCU (COMBINED CHARGING UNIT)
2026-03-06
This Service Information bulletin (Revision 03) supersedes SI B12 05 23 dated December 2024.
What’s New:
The Procedure, Parts Information, and Claim Information sections have been updated
Attachment renamed
☐

THIS REPAIR IS MOBILE FRIENDLY

MODEL
E-Series
G26 BEV
G60 BEV
G70 BEV
i20

Model Description
i4 eDrive35, i4 eDrive40, i4 xDrive40, i4 M50 Gran
Coupe (Battery Electric Vehicle (BEV))
i5 M60, i5 eDrive40 Sedan
i7 xDrive60 Sedan
iX xDrive50, iX M60 Sports Activity Vehicle

Production Date
SOP to 11/2023
SOP to 11/2023
SOP to 11/2023
SOP to 11/2023

SITUATION
The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster.
In addition, the following fault memory entries are saved in the CCU (Combined Charging Unit)
0317F2 - High-voltage system, insulation fault detected: when switch contactors are closed.
0317F1 - High-voltage system, insulation resistance below warning threshold: when switch contactors
are closed.
The fault memory entries (isolation faults) can occur both individually and in combination and must be traced
back to the eDrive motor based on the ISTA test procedure.
If ISTA test procedure lists possible cause of fault as; A metal chip is found behind the brush module
(between the brush module and the end shield of the electrical machine). Repair required. Refer to service
solution no. 20000794435083 in Aftersales Information Research (AIR). Follow information in the Procedure
section below.

CAUSE
There could be a metal chip behind the brush module, and/or there is contamination of the eDrive unit from
the manufacturing process. This metal debris may not be visible.
This can affect vehicles listed above that were built before 11/23.

CORRECTION
Remove brush module from affected eDrive motor and thoroughly clean the rotor and brush module as
described in the Procedure section.
Remove brush module from affected eDrive motor and thoroughly clean the rotor and brush module as
described in the Procedure section.

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NOTE: ONLY PERFORM THIS PROCEDURE IF TEST PLAN DIAGNOSIS LEADS TO THE CLEANING
PROCEDURE.
ROCEDURE IF TEST PLAN DIAGNOSIS LEADS TO THE CLEANING PROCEDURE.

PROCEDURE
Important Warning for Working on the High-Voltage (HV) systems on BMW Group vehicles:
Only properly trained personnel, who passed all applicable HV Technical Training Courses, should
perform repairs which require disconnecting, or removal of High Voltage battery components on any
Hybrid or Electric Vehicle. Work performed on High Voltage systems by unqualified persons may
result in severe injury or damage to the vehicle. Additional safety information is found in Repair
Instruction 61 00… “Observe safety instructions when handling electric vehicles”.
Additional Information:
Scheduled Maintenance, or Quality Certification 1 (Pre-Delivery Inspection) on Electric or Hybrid
vehicles does not require HV technical training.
Prior to disconnecting, or the removal of any HV component, the HV system needs to be disabled
and secured (by means of the HV Disconnect Switch) by a properly trained technician, who has a
minimum HV Qualification level after completing the Technical Training Course ST1824 (Alternative
Drive Part 1). Once the vehicle’s HV system is disabled (the “Blitz” – lightning bolt icon displayed in
instrument cluster, see below), a technician without HV Certification may remove a HV component
(e.g., EH Heater, EKK Compressor, EME Control Unit, et.), except for the High Voltage Battery.

High Voltage Battery removal and rework can be performed ONLY by a HV Specialist Technician
(certified by the Technical Training Course ST1825 – Alternative Drive Part 2), AND with a HV Battery
Certification level corresponding to a specific Electric or Hybrid vehicle (e.g., to repair GEN4 battery
of G05 PHEV, certification from Technical Training Course “ST2006 – SP44 HV Battery” is required).
Therefore, to perform this SIB 12 05 23, a GEN5 battery Certification is required from Technical
Training Course “ST2205 Generation 5 High-voltage” class).
Depending on the vehicle model and the result of the ISTA test module, either the rear or the front eDrive
motor is affected.
Remove the affected eDrive motor as per ISTA test module.
NOTE: DO NOT DRAIN THE TRANSMISSION FLUID.
All Models
For the rear (Reference/observe repair instruction 12 35 530/12 35 531)

All Models except for the eDrive RWD only Models
For the front (Reference/observe repair instruction 12 35 520/12 35 521).

Then remove the brush module.
NOTE: DO NOT REPLACE
BRUSH
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OFMODULE.
NORTH AMERICA, LLC. ALL RIGHTS RESERVED
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Thoroughly vacuum the area on the eDrive motor behind the brush module, and the brush module itself with
the vacuum cleaner.
Then use a clean lint-free cloth to clean/wipe the area on the eDrive motor behind the brush module.
In addition, clean/wipe the slip rings (bronze
rings) on the rotor, with a clean lint-free cloth
(arrows).
NOTE: If oil is found leaking from rotor seal
and has contaminated brush module, please
submit TC case to determine the condition of
the copper rings before continuing with this
procedure.

Important: Optimal cleaning can only be carried out when the brush module is removed. Only a clean lintfree cloth is to be used to clean the above-mentioned areas and components.
Never use mechanical cleaning tools!
All Models
For the removal of the rear brush module (Reference/observe repair instruction 12 37 902)

All Models except for the eDrive RWD only Models
For the removal of the front brush module (Reference/observe repair instruction 12 37 702).

NOTE: Black dust in the area of the brush module is normal abrasion of the carbon brushes and has no
effect on the described cause.
Then re-install the brush module and reassemble eDrive unit.
Perform an EoS test on the drive unit. If EOS test fails after cleaning procedure, please submit TC case for
next steps.
Reinstall drive unit in vehicle after EOS test pass

PARTS INFORMATION
NOTE: For parts for eDrive removal and installation per Vehicle Model, refer to the attachment. Parts have
changed for G60 Front eDrive and G60 Rear eDrive.
Part Number
83 19 5A32851
Or:

Description
HT-12 Antifreeze RTU (Bulk, DN = 1/10 liter) (Pre-mix)

Quantity
Sublet as needed

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83 19 2468442
NPN
83 19 0404517

12 05 23_ISOLATION FAULTS SAVED IN CCU (COMBINED CHARGING UNIT)

BMW Antifreeze/Coolant (DN = 1 Gallon Concentrate) HT-12
Lint free cloth (sourced locally)
Liquid sealant, Loctite 5970 (DN = 50 ml)

Sublet as needed
Sublet as needed
Sublet as needed

Additionally, other materials and small parts that are not specified above, such as fluids, lubricants, one-time
use screws, nuts, and seals, which must be replaced or installed according to the ISTA repair
instructions/ETK, must be selected from the Electronic Parts Catalog, or other approved BMW resources,
according to the respective vehicle type. Invoiced these items separately under the Repair Code listed in
this bulletin.

CLAIM INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks,
or the BMW Certified Pre-Owned Program.
Repair Code:

1233001500

eDrive motor-permanent malfunction

Obtain the flat rate unit (FRU) allowances for the following that applies.

Labor
Operation
00 00 006
Or:
00 00 556
And, as needed:
61 00 006*
Or:
00 58 500*

Description

Labor Allowance

Carrying out vehicle test (Main work)

As applicable

Carrying out vehicle test (Plusposition work)

As applicable

Carrying out vehicle diagnosis, ABL (Work time)

WT FRU

Diagnosis Worktime Flat Rate

2 FRU

If you are using a Main labor code for another repair, use the Plus code labor operation 00 00 556 instead of
00 00 006, or exclude when the Vehicle Test is included in another repair.
BEVs: Labor operation code 61 21 528 is not necessary for performing a Vehicle Test.
Work time labor operation codes 61 00 006 and 00 58 500 are not considered Main labor operations.
And, for the:
Rear Electric Drive Unit (All Models)
Labor
Operation

Description

Labor Allowance

12 35 530

Removing and installing rear electric drive unit completely
(Plusposition work)

As applicable

Replace (Remove/Install) brush module rear (For access
only)

As applicable

And:
12 37 902
Or/and for the:
Front Electric Drive Unit (Excluding the eDrive RWD only Models)
Labor
Operation
12 35 520
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Description

Labor Allowance

Removing and installing front electric drive unit completely
As applicable
(Plusposition
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BMW OFwork)
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And:
12 37 702

Replace (Remove/Install) brush module front (For
access only)

As applicable

Always refer to the AIR repair instructions, and the flat rate unit group details for the Engine
electrical system’s: Rear electric drive unit and/or Front electric drive unit for other additional and/or
required work procedures that may also apply.
And:
Labor
Operation

Description

Labor Allowance

17 00 533

Check tightness of rear electric drive unit cooling system
(Also applies to the Front Electric Drive Unit repairs)

As applicable

Perform EoS test

As applicable

And:
12 35 900

And, only when noted in AIR with:
“AW specification without wheel alignment” is specified for 12 35 520 or 12 35 530
Labor
Operation

Description

Labor Allowance

32 00 595

Kinematics Diagnosis System wheel alignment with ride
height measurement without loading the vehicle
(Plusposition)

Refer to AIR

And:
32 00 601
And, as needed:

Adjusting toe-in on front axle (Associated work)

Refer to AIR

32 00 650

32 00 650 Additional work for integral active steering
(HSR)(Associated work)

Refer to AIR

And, as needed, based on the results of checking the vehicle’s wheel alignment
Labor
Operation

Description

Labor Allowance

32 00 NNN

Refer to Main Group 32 (Steering and wheel alignment /
Electronic wheel alignment) for other/additional wheel
alignment-related work that may also need to be
performed

Refer to AIR

And:
Sublet – Bulk Supply Materials (RO and Claim Comments Required)
Sublet Code 4

Reimbursement for the repair-related bulk supply materials
(Do not use the BMW part numbers for claim submission)

See the sublet
reimbursement
calculations below

Sublet reimbursement calculation for claiming the applicable repair-related bulk supply materials (BMW part
numbers) is at the dealer net (DN) price for the full or proportional quantities used plus your center’s
handling.
BMW Antifreeze/Coolant: Claim the corresponding sublet dollar amount for the quantity needed to replace
what was drained. The one-gallon concentrate’s part number quantity as needed to obtain a 50/50
coolant/water solution.

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Enter this material cost in sublet and itemize the amount on the repair order and in claim comment section.
No Part Number (NPN): Locally sourced supplies (Items not Available through BMW NA Only) are
reimbursed at the cost of the proportional quantity used plus 20 percent (WPPM Section 8 Page 25).
Enter the total material cost in sublet and itemize each item in the amount on the repair order and in claim
comment section.
BMW Group’s AIR Application Resource for Flat Rate Labor Operation Codes
To obtain the corresponding flat rate unit (FRU) allowance information from the BMW Group AIR application
resource, start by entering the Chassis Number (last seven (7) characters of the VIN), and click on the
“Search” icon. If the “Vehicle Selection” window displays two or more model possible vehicle choices, select
the applicable Model, or enter the full VIN (17 characters) instead to proceed. Click on the “Flat Rate Units”
button and enter a flat rate labor operation code number “without spaces” in the field to the right, click on the
“Search” icon to display the corresponding listing of “Flat rate unit group details” that are available and their
corresponding FRU allowances.
*Based on which one applies to your center, please refer to SI B01 01 20 or B01 07 20 for the applicable procedure
for documenting, claiming, and explaining, on the RO and in the claim comments, your diagnosis work time (WT),
job/repair work time (WT), and the vehicle repairs your center performed, unless otherwise required by State law.
Overlapping Labor Removal (AIR client’s FRU Plausibility Check Tool)
In the rare instance where both the front and rear electric drive units have the issue described in this Service
Information Bulletin, please work together with your center’s Warranty Manager, Warranty Administrator, and/or
Booker to identify the overlapping labor contained in the flat rate labor operation codes listed above. As determined
by the AIR Client’s FRU Plausibility Check Tool; calculate, claim, and submit for the reduced FRU allowances that
apply.

FEEDBACK REGARDING THIS BULLETIN
Technical Feedback
Warranty Feedback
Parts Feedback

To submit feedback for the technical topic of this bulletin: Submit your
feedback in the rating box at the top of this bulletin
To submit feedback for the CLAIMS section of this bulletin: Submit an IDS
ticket to the Warranty Department, or use the chat available in the
Warranty Documentation Portal
To submit feedback for the PARTS section of this bulletin: Submit an IDS
ticket to the Parts Department

Supporting Materials
picture_as_pdf B120523_AT_1 Parts 12_2024.pdf

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B12 05 23 Attachment

December 2024

G70 Front eDrive
Part Number
33 30 6782246
31 10 6872062
32 30 6778609
33 13 1214961
31 20 6866022
31 10 6765451
31 10 6789333
07 11 9904956
34 10 6864424
07 11 9904161
07 11 9906100
07 14 8835360
37 10 6789678
07 14 7283812
31 11 6899302
07 14 8837399
07 14 8840397
12 37 1023794

Description
Hexagon screw with washer
Hexagon screw with washer
Torx bolt
Retaining ring
Shouldered bolt with compression spring
Combination nut
Outside torx bolt
Hexagon bolt
Torx screw with washer
Hexagon bolt with collar
Hexagon head collar bolt
Combination nut
Flanged hexagon nut