Technical product information
DTC B101C29 and/or DTC B101D29 evident within the airbag control unit (J234)
Australia E04 Bentley rest Asia and Australia (6E04),China 723 Volkswagen (Anhui) Automotive CO (6723),China 796 VW Import
Comp. Ltd (Vico), Beijing (6796),Germany E02 Bentley rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08
Bentley South Korea (6E08),United Arab Emirates E06 Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK
(6E01),United States E05 Bentley USA and rest America (6E05)
Bentley

Topic
Market
area

Brand
Transaction
2071047/3
No.
Level
EH
Status
Approval
Release
date
Event memory entries
Diagnostic address
0015 - Airbag
0015 - Airbag
0015 - Airbag
0015 - Airbag

Event memory entry
Fault type Fault status
B101C29: Driver seat belt switch implausible signal
Intermittent
B101D29: Front passenger side safety belt switch implausible signal
Intermittent
B101C29: Driver seat belt switch implausible signal
static
B101D29: Front passenger side safety belt switch implausible signal
static

New customer code
Object of complaint
Complaint type
Position
occupant protection, pedestrian protection -> airbag
component / consumables
occupant protection, pedestrian protection -> seat belts, 1st row component / consumables

Vehicle data
Bentayga Series
Sales types
Type
4V1*
4V1*
4V1*
4V1*
ZV1*
ZV1*

MY
2021
2022
2023
2024
2023
2024

Brand Designation Engine code Gearbox code Final drive code
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*

Documents
name

INTERNAL

Customer statement / workshop findings
One or a combination of the following DTC’s are evident within the airbag control unit (J234)
B101C29: Driver seat belt switch implausible signal
And/or
B101D29: Front passenger side safety belt switch implausible signal

Technical background
Refer to the Measure section of this TPI ensuring all steps are followed to completion depending on the side in which the issue is evident (driver
and/or passenger)
NOTICE
(IDE01193 and IDE01194)
•

Manoeuvre the seatbelt buckle whilst the seatbelt tongue is inserted into the seatbelt buckle

•

Remove and refit the seatbelt tongue from the seatbelt buckle

Hint: For clarity, there are videos located on the Bentley Hub reference TPI 2071047/- Video 1 and Video 2 which show the required steps which
must be conducted whilst monitoring the MWB’s
NOTICE
instructions

Production change
-

Measure
WARNING
bag system and seat belt pre-tensioners as detailed within Rep.Gr 69

Drivers side
1) Insert the drivers side seatbelt tongue into the seatbelt buckle (Figure 1)
2) Referring to TPI 2071131/- Measured values - Cycle recording instructions - Record MVB IDE01193 (Drivers side) whilst manoeuvring the
seatbelt buckle assembly - Reference the Bentley Hub TPI 2071047/- (Video 1)

Figure 1

INTERNAL

3) Referring to TPI 2071131/- Measured values - Cycle recording instructions - Record MVB IDE01193 (Drivers side) whilst installing and
removing the seatbelt tongue from the buckle the seatbelt buckle assembly - Reference the Bentley Hub TPI 2071047/- (Video 2)
4) Referring to the applicable wiring diagram/Figure 2 - Locate E24

Figure 2
5) Referring to Figure 3 - Disconnect the E24 connection (circle)

Figure 3
6) With the tongue inserted into the buckle (Figure 1) measure and record the resistance of the drivers side seatbelt buckle using a suitable
multimeter
Hint: The next part of the procedure requires the resistance of the seat belt buckle harness to be measured. The resistance
measurement must be taken at the location shown in Figure 3 (Point A) The operative must take care not to damage the
terminals shown at point A when taking the resistance measurements
Resistance measurement with the tongue inserted in the buckle
Ω=
Comments:
7) With the tongue removed the buckle measure and record the resistance from the drivers side seatbelt buckle using a suitable multimeter
Hint: The next part of the procedure requires the resistance of the seat belt buckle harness to be measured. The resistance
measurement must be taken at the location shown in Figure 3 (Point A) The operative must take care not to damage the
terminals shown at point A when taking the resistance measurements

INTERNAL

Resistance measurement with the tongue removed the buckle

Comments:
•

Raise a technical DISS query - Ensure that a current ODIS log and all of the required XML files are attached to a new or existing technical
DISS query

•

Await feedback from Product Support before conducting any further work or diagnosis
NOTICE

Senior Engineer

Passenger side
1) Referring to Figure 4 - Insert the passenger side seatbelt tongue into the seatbelt buckle
2) Referring to TPI 2071131/- Measured values - Cycle recording instructions - Record MVB IDE01194 (passenger side) whilst manoeuvring the
seatbelt buckle assembly - Reference the Bentley Hub TPI 2071047/- (Video 1)

Figure 4
3) Referring to TPI 2071131/- Measured values - Cycle recording instructions - Record MVB IDE01194 (passenger side) whilst installing and
removing the seatbelt tongue from the buckle the seatbelt buckle assembly - Reference the Bentley Hub TPI 2071047/- (Video 2)
4) Referring to the applicable wiring diagram/Figure 5 - Locate E25

INTERNAL

Figure 5
5) Referring to Figure 6 - Disconnect the E25 connection (circle)

Figure 6
Hint: The next part of the procedure requires the resistance of the seat belt buckle harness to be measured. The resistance
measurement must be taken at the location shown in Figure 3 (Point A) The operative must take care not to damage the
terminals shown at point A when taking the resistance measurements
6) With the tongue inserted into the buckle (Figure 1) measure and record the resistance of the passenger side seatbelt buckle using a suitable
multimeter
Resistance measurement with the tongue inserted in the buckle
Ω=
Comments:
7) With the tongue removed the buckle measure and record the resistance from the passenger side seatbelt buckle using a suitable multimeter
Hint: The next part of the procedure requires the resistance of the seat belt buckle harness to be measured. The resistance
measurement must be taken at the location shown in Figure 3 (Point A) The operative must take care not to damage the
terminals shown at point A when taking the resistance measurements
Resistance measurement with the tongue removed the buckle
Ω=
Comments:
INTERNAL

•

Raise a technical DISS query - Ensure that a current ODIS log and all of the required XML files are attached to a new or existing technical
DISS query

•

Await feedback from Product Support before conducting any further work or diagnosis
NOTICE

Senior Engineer

Warranty accounting instructions
Warranty Type
110 or 910
Damage Service Number 69 24
Damage Code
00 40
Labour Operation Code 01 50 00 00
Time As per ODIS log (Must not exceed 50 TU’s)

INTERNAL