Technical Service Bulletin
Topic Steering malfunction message displayed on dash, DTC 'C10AC07-Steering mechanical malfunction' stored
Market area Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Brand Bentley
Transaction No. 2051802/2
Level EH
Status
Release date
Diagnostic trouble codes
Diagnostic address Diagnostic trouble code Fault symptom Storage state
0044 - Steering Assistance C10AC07: Steering mechanical malfunction static
0044 - Steering Assistance C10AC07: Steering mechanical malfunction Intermittent
New customer code
Object of complaint Complaint type Position
information, navigation, communication, entertainment -> warning display symbols -> power steering failure functionality ->
warning display activates
New workshop code
Object of complaint Complaint type Position
chassis -> steering -> steering gear control modules, services -> with fault stored in the DTC memory front
Vehicle data
Bentayga
Sales types
Type MY Brand Designation Engine code Gearbox code Final drive code
4V1* 2017 E * * *
4V1* 2018 E * * *
Control units
Diagnostic address Software part number Software version Hardware part number Hardware version
0044 - Steering Assistance 4M0.909.144.G 0004 4M0.909.144.B H17
0044 - Steering Assistance 4M0.909.144.G 0004 4M0.909.144.B H19
0044 - Steering Assistance 4M0.909.144.G 0004 4M0.909.144.B H20
0044 - Steering Assistance 4M0.909.144.H 0005 4M0.909.144.B H17
0044 - Steering Assistance 4M0.909.144.H 0005 4M0.909.144.B H18
0044 - Steering Assistance 4M0.909.144.H 0005 4M0.909.144.B H19
0044 - Steering Assistance 4M0.909.144.H 0005 4M0.909.144.B H20
0044 - Steering Assistance 4M0.909.144.H 0005 4M0.909.144.B H22
Documents
Document name
master.xml
Technical Service Bulletin Transaction No.: 2051802/2
Steering malfunction message displayed on dash, DTC 'C10AC07-Steering mechanical malfunction' stored
Condition
Customer statement:
• Steering malfunction message on dash
And/or
• Reduced steering assistance
Workshop findings:
One or several of the customer statements can be reproduced.
The following entry is logged in address 44-Steering assistance.
• C10AC07-Steering mechanical malfunction
Technical Background
Incorrect software in the power steering control unit.
Production Solution
*
Service
Check the Software Part Number and Software Version of the 44-Steering assistance control unit to see if your vehicle is affected.
• ODIS tester: → Address 44-Steering assistance → Guided Functions → Read identification data
Only the combinations in the table are affected by this TPI
Software Part Number Software Version
4M0 909 144 G 0004
4M0 909 144 H 0005
Measure:
The following points must be observed prior to any work commencing.
• Make sure that a battery charger is connected to the vehicle battery.
• During the software update switch off all unnecessary electric consumers (for example ventilation, seat heater, interior lighting and so on).
• Make sure that during the software update no electro-magnetic radiation sources (for example, mobile phones or cordless phones) are used in or
near the vehicle.
• A cable connection between the ODIS tester and the vehicle must be used. When using a Bluetooth or a WiFi connection (diagnostic tool) the
software update may fail.
4M0 909 144 G (0004) only
Update the software of the power steering control unit (-J500-) according to the following table.
Old Software Part Old Software Version New Software Part New Software Version
number Number
4M0 909 144 G 0004 4M0 909 144 H 0005
The procedure for updating software is described under;
• ODIS tester: → Special functions → SVM-problem related Hardware/software update → Enter SVM code: 4V044FT01 → Follow on
screen instructions.
When the software flash is completed you will be prompted to change the parameters. Select YES.
After the software update the ‘Steering End Stops’ require adapting, carry out test plan;
• ODIS tester → Select own test - 44 → Functions → Adapt end stops (Rep.Gr.48) → Follow on screen instructions.
4M0 909 144 H (0005) only
Reparametrize the software of power steering control unit (–J500-) according to the following instructions;
The procedure for parametrization is described under:
• ODIS tester: → Special functions → SVM-problem related Hardware/software update → Enter SVM code: 4V044FT01 → Follow on screen
instructions.
After completion of either procedure, check that the parametrization has been successful;
• ODIS tester: → Address 44-Steering assistance → Guided Functions → Read identification data
Under the title Information Parameters, the Record Number should end in suffix FT, see Figure 1. This confirms the procedure has been
successful.
Figure 1
Warranty
Warranty Type 110 or 910
Labour Operation Code 01 29 00 05
Damage Service Number 48 35
Damage Code 00 40
Time 50 TU
