10/1/2019

72 04 17_FALSE WARNINGS THAT THE FRONT PASSENGER SEAT IS OCCUPIED WITHOUT THE SEAT BELT BUCKLED

SIB 72 04 17
FALSE WARNINGS THAT THE FRONT PASSENGER SEAT IS
OCCUPIED WITHOUT THE SEAT BELT BUCKLED

2019-09-17

This Service Information bulletin (Revision 9) supersedes SI B72 04 17 dated September 2019.
What’s new (Specific text highlighted):

Repair Procedure attachment
Correction, Procedure sections

MODEL
F90 (M5 Sedan)
produced to August
2018
G12 (7 Series
Sedan) produced to July
2018

G01 (X3 Sports Activity
Vehicle) produced to
July 2018
G30 (5 Series
Sedan) produced to July
2018

G02 (X4 Sports Activity
Coupe) produced to July
2018
G32 (6 Series Gran
Turismo) produced to
July 2018

G05 (X5 SAV) produced
from July 2018 to
September 2018

SITUATION
Acoustic and visual warnings indicate that the front passenger seat is occupied and the safety belt is not
fastened, when the seat is actually unoccupied.
If the situation is currently present, sit in the seat and move the seat to a slightly different position. The POL
(Passenger Occupancy Light) light should now function correctly.
In some cases the Air bag Warning Light was illuminated. Advanced Crash Safety Module (ACSM) fault
“930A1C - Front passenger seat occupancy detection transmitting fault (moisture)” is stored.

CAUSE
Any or all of the following can contribute to this situation:

1. Electronics (e.g., smart phones or laptops) are connected to the USB charging port or cigarette
lighter and placed on the seat.
2. The seat was wet (e.g. very high humidity, spilled liquids or rain).
3. Faulty plug connection to the Evaluation Electronics CIS (Capacitive Interior Sensing).
4. Excessive spacing between the seat mat sensor signal wires and their grounding shield sleeve.

CORRECTION
Peform a non-invasive check for moisture / stains on the seat and at the CIS evaluation
electronics module electrical connector
If there is no obvious moisture / stains, secure the loose cables by installing 2 cable ties
If the 2 cables ties are already installed properly and the fault is still occurring:
Check for moisture damage to the CIS mat
If no moisture is found, replace the CIS seat mat
Note: Do not replace the CIS electronics or the ACSM module for this situation.

PROCEDURE
Copyright ©2019 BMW of North America, Inc.
1/4

10/1/2019

72 04 17_FALSE WARNINGS THAT THE FRONT PASSENGER SEAT IS OCCUPIED WITHOUT THE SEAT BELT BUCKLED

For conditions that are similar to the situation described above:

1. Verify with the customer that no objects were lying on the seat that could have caused the
warnings.
Note: Electronic devices that are placed on the front passenger seat, e.g., laptop computers, mobile
phones, etc., could cause the front passenger airbag warning lamp to activate.
This behavior occurs primarily with devices that are connected to the vehicle electrical system via a USB
cable or other charger adapter.
In vehicles with an acoustic safety belt warning, this could cause the warning signal to sound.
2. Moisture on the seat surface can also cause a faulty seat occupancy detection. In this case ACSM fault
930A1C will be stored.
Perform a non-invasive check for signs of moisture.
a) If moisture is found, dry the mat and clear the fault. Moisture caused by outside influence is a nonwarranty issue.
b) If no moisture is found, proceed to the next step.
3. If steps 1 and 2 do not identify the cause of the warnings, access the label on the seat mat harness and
follow the attached diagnosis flow chart. If the flow chart recommends installation of 2 cable ties, proceed to
step 4.
As referenced in the Diagnosis Chart attachment,
an AI index of 01 is shown (circled).

4. Install 2 cable ties on the seat wiring harness as shown in the attached repair instructions and in
this video https://tinyurl.com/V520218.
a) Set the cable tie tightening tool adjustment to 3.75 when securing the cable ties.
b) The cable ties ONLY GO AROUND THE WIRING HARNESS. Do not attach the cable ties to
the seat frame.
c) The purpose of these two cable ties is to tighten the ground shield sleeve around the two
signal wires.
5. Check the validity of the repair by ensuring no faults or check control messages are displayed.

PARTS INFORMATION
Copyright ©2019 BMW of North America, Inc.
2/4

10/1/2019

72 04 17_FALSE WARNINGS THAT THE FRONT PASSENGER SEAT IS OCCUPIED WITHOUT THE SEAT BELT BUCKLED

Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK
or AIR which takes into account specific equipment and/or options.
Part Number:
61 13 8 377 065
Refer to ETK or AIR

Description:
Cable tie
CIS seat mat

Quantity:
2
1 if needed
Note: Replacing the CIS electronics or the
ACSM module will not correct this issue.

WARRANTY INFORMATION
Covered, for defects in materials or workmanship (non-moisture related issues), under the terms of the
BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.
Defect Code:

6577081400

Labor Operation
65 99 000

Description
Work time to secure the CIS cable under the seat (Main
work)

Labor Allowance
4 FRU

Work time to secure the CIS cable under the seat (Plus
work – Vehicle is already in the workshop)

2 FRU

Or:
65 99 000

Mat, SBE, Front temporary malfunction

Or:
The Two (2) cables ties are already installed properly
Labor Operation
00 00 006
Or:
00 00 556
And:
61 21 528
And
65 77 ###*
And:
61 00 730

Description
Performing vehicle test (with vehicle diagnosis system –
checking faults) (Main work)

Labor Allowance
Refer to AIR

Performing vehicle test (with vehicle diagnosis system –
checking faults) (Plus work)

Refer to AIR

Connect an approved battery charger/power supply
(indicated in AIR as Charging battery)

Refer to AIR

Replacing seat occupancy mat for passenger seat

Refer to AIR

Programming/encoding control unit(s)

Refer to AIR

Copyright ©2019 BMW of North America, Inc.
3/4

10/1/2019

72 04 17_FALSE WARNINGS THAT THE FRONT PASSENGER SEAT IS OCCUPIED WITHOUT THE SEAT BELT BUCKLED

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.
*Refer to AIR for the applicable seat occupancy mat flat rate labor operation number and FRU allowance
that applies to the vehicle’s seat type being repaired.
And, additionally for the:
e-Vehicles
Labor Operation
61 25 910

Description
Recharging high-voltage battery unit (to high voltage charging
socket)

Labor Allowance
Refer to AIR

During the same workshop visit, if a vehicle also requires another Technical Campaign or repair that also
includes programming and encoding the control units, the programming procedure may only be invoiced
one time.
Programming and Encoding - Vehicle Control Units (RO and Claim Comments Required)
The programming procedure automatically reprograms and encodes all vehicle control modules which do
not have the latest software i-level. If one or more control module failures occur during this programming
procedure:
Please claim this consequential control module-related repair work under the defect code listed in
this bulletin with the applicable AIR labor operations.
Please explain this additional work (The why and what) on the repair order and in the claim comments
section.
For control module failures that occurred prior to performing this programming procedure:
When covered under an applicable limited warranty, claim this control module-related repair work
using the applicable defect code and labor operations in AIR (including diagnosis with separate
punch times).
Other Repairs
If other eligible and covered work is performed as a result of performing the ISTA diagnostics and related
test plans, claim this work with the applicable defect code and the labor operations that are listed in AIR
(including diagnosis with separate punch times).

Supporting Materials
picture_as_pdf B720417_Repair_Procedure.pdf
picture_as_pdf B720417_Diagnosis_Chart.pdf
Videos
52 02 18

Copyright ©2019 BMW of North America, Inc.
4/4

July 2018

SI B72 04 17 Attachment

The SI B72 04 17_Attachment supersedes dated February 2018
New information provided by this revision is preceded by this symbol

PASSENGER OCCUPANCY DETECTION ERROR CORRECTION

1. Move the front seat to its highest position.
2. Detach the lower front seat trim.
3. Disconnect the Evaluation Electronics
(CIS) plug connection.

4. Check the plug for conditions resulting in
possible poor electrical connection –
corrosion, bent pins, etc. – removing
control unit if needed, as shown.
5. Repair any connection problems.
6. Securely re-install control unit, if removed.
7. Reconnect plug into CIS.

1

July 2018

SI B72 04 17 Attachment

8. Secure the loose clip attached to cables,
as shown.

For cable tie postion, review the: https://tinyurl.com/V520218

First cable tie position as shown in above photo

2

July 2018

SI B72 04 17 Attachment

Secound cable tie position as shown in above photo
9. With the tool showing in the picture, tie the
cable only around the harness.

10. Re-attach seat trim panel.
11. Verify free motion of seat belt and seat adjustment.
12. Verify correct operation of occupant detection system. There should be no fault memory
entries for airbag warnings.
13. Check the POL function.

3

Attachment to B720417

Start G12

Check if Seat Mat Label Index (AI)
>= 10 (Basic) / 11 (Comfort Seat
with memory)?

yes

September 2019

Create Puma Case
including picture of
Seat Mat Label

no

Check if cable ties are attached to
cable as described in
SI B72 04 17?

yes

Replace Seat Mat

no

no

Attach cable ties as described in
SI B72 04 17

Check if New Seat Mat Label
Index (AI)
>= 10 (Basis) / 11 (Comfort Seat
with memory)?

yes

End.

Start G30 / G32

Check if Seat Mat Label Index (AI)
>= 11 (Comfort Seat with
memory) / 05 (Sport)?

yes

Create Puma Case
including picture of
Seat Mat Label

no

Check if cable ties are attached to
cable as described in
SI B72 04 17?

yes

Replace Seat Mat

no

no

Attach cable ties as described in
SI B72 04 17

Check if New Seat Mat Label
Index (AI)
>= 11 (Comfort Seat with
memory) / 05 (Sport)?

yes

End.

Start G05 / F90

Check if Seat Mat Label Index (AI)
>= 05

yes

Create Puma Case
including picture of
Seat Mat Label

no

Check if cable ties are attached to
cable as described in
SI B72 04 17?

yes

Replace Seat Mat

no

no

Attach cable ties as described in
SI B72 04 17

Check if New Seat Mat Label
Index (AI)
>= 05

yes

End.

Start G01 / G02

Check if Seat Mat Label
Index (AI) >= AI06 ?

yes

Create Puma Case
including picture of
Seat Mat Label

no

Check if cable ties are attached to
cable as described in
SI B72 04 17?

yes

Replace Seat Mat

no

no

Attach cable ties as described in
SI B72 04 17

Check if New Seat Mat Label
Index (AI) >= AI06?

yes

End.