Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Transmission communication DTC's (Numerous) - W12 engine
Bentley: worldwide (2WBE)
Bentley
2059068/3
EH
Approval

New customer code
Object of complaint

Complaint type

vehicle service -> vehicle diagnosis -> guided fault finding
electrical power, electric system, data transfer -> data bus systems
power transmission -> power distribution, power flow -> power flow
electrical power, electric system, data transfer -> power supply

control units, services -> with event log entry
component / consumables
functionality -> without function / defect
functionality

Vehicle data
New Continental GT and New Continental GTC - W12 engine
Sales types
Type

MY Brand Designation Engine code Gearbox code Final drive code

3S31BB
3S31BB
3S31BB
3S31BB
3S41BB
3S41BB
3S41BB
3S41BB

2018
2019
2020
2021
2018
2019
2020
2021

E
E
E
E
E
E
E
E

Documents
Document name
master.xml

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Position

Technical product information
Transmission communication DTC's (Numerous) - W12 engine

Transaction No.: 2059068/3

Customer statement / workshop findings
Customer statement
Drive system fault active on DIP (Figure 1)
Figure 1
Workshop findings
Various and/or numerous Transmission control module (TCM) communication DTC’s logged

Technical background
Loose pins within the transmission link harness to the Mechatronic unit for dual clutch gearbox -J743- connections can lead to various
transmission communication and hardware based DTC’s

Production change
Not applicable

Measure
Ensure the ignition is switched off for the duration of this procedure
1) Remove the left hand front wheel arch liner - Refer to Repair manual Rep.Gr 66
•

Referring to Figure 2 - Disconnect the three connectors shown

Extreme care MUST be taken when conducting pin/terminal grab checks and resistance checks as damage can easily be caused
to the pins/terminals
2) Once disconnected carry out pin/terminal grab checks on all three male and female connections
NOTE: All resistance values shown within this TPI are approximate, tolerances may vary depending on the quality/type and age of the multimeter and or leads used
•

In the event the main vehicle harness pins are not to specification the applicable pins should be replaced

•
•

Should any issues be found with the transmission link harness and/or pins – the harness should be replaced
In the event the pins are to specification or the applicable repairs have been done (for example – Harness replacement or pin replacement)
- Reconnect all three connectors

Figure 2

3) Remove the rear subframe support – Rep.Gr 40 (Figure 3)

Figure 3
4) Disconnect the connections (Figure 4 - Arrows) from the Mechatronic unit for dual clutch gearbox -J7435) Gain access and disconnect the transmission control module plug T58g - Refer to Repair manual Rep.Gr 37
•

Referring to the applicable current flow diagram and Figure 5 and 6 - Carry out resistance and pin/terminal grab checks on all disconnected
connections from the T58g connector to T20az and T20ay on the harness.

Figure 4

Figure 5

Figure 6
When conducting the T 58g resistance checks from pin 5 to the relevant fuse ( Refer to the applicable Wiring diagram) please
ensure the correct fuse board is located

TIP: For best results the fuse should be removed and checked from the correct pin to T58g, once the check has been done refit
the fuse
SK = LHD
SP = RHD
Connector TV48 ( Figure 7) MUST also be disconnected when conducting the pin 55 to TV48 resistance check TIP: once the
check has been done reconnect TV48

Figure 7
6) Should all the resistance checks be within specification – Reconnect T20az and T20ay and referring to Figure 8 (Connector T58g) carry out
the requested pin resistance checks
NOTE: Referring to Figure 8 - The resistance value for checks on PIN’s 29 to 16 ( Transmission fluid temperature sensor) will
vary depending on the actual transmission fluid temperature
Connector T58

Figure 8
Should any issues be found with the Mechatronic unit for dual clutch gearbox - J743- pin connections/transmission control
module plug ( T 58g) pin connections or resistance values - Please raise a DISS query and await feedback before carrying out any
further work

Warranty accounting instructions
Warranty type:
Service ID number:
Damage type:
Labour

910 or 110
9797
0040

Time to conduct wiring checks
Labour operation code: 38 85 01 05
Time:
160 Time units
Time to replace link harness
Labour operation code: 38 85 55 55
Time
20 Time units

Parts information
Part number

Description

Refer to ETKA Link harness

Quantity
1