232 New TSBs uploaded June 2024

Newly uploaded TSBs May/June 2024:

232 New TSBs

180 updates of existing TSBs.

Example 1:

Faulty alternator, faulty BCM or is it something else?

TSB No. 10967 – Volkswagen Transporter T6.

Symptoms:

MIL on, possibly problems with carrying out a regeneration, one/more fault codes stored:
02252 – Generator
U014000 – Lost Communication With Body Control Module

This TSB addresses a very common issue on this model, often occurring when the car is 4-5 years old. There is no OEM TSB (TPI) for this issue, but based on our Hotline statistics (from a service that answers more than 50,000 questions a year), this fault seems almost like a planned-to-fail feature on this model.

Canbus BCM to ECM

Diagnosing this problem varies across workshops, and symptoms can also differ. Some workshops focus on the fault code U014000 – Lost Communication With Body Control Module and start by measuring the Canbus between the engine control unit and the BCM (J519). Often, they find that the Canbus looks flawless even when the fault is present. See the attached measurement with PICO.

Remote Coding

If the Canbus appears good and the power and ground to the BCM are perfect, the issue must be software-related. The workshop will then check for software updates to the BCM. If no new software is available, they will re-install the software to eliminate the possibility of software bugs. Workshops not equipped with ODIS often get this done via a Remote Coding service.

Workshops might conclude that since all other possibilities for errors causing communication issues between BCM and ECM have been checked without any evidence of errors, the problem must be a faulty BCM. This BCM is often replaced by the workshop and needs to be coded via ODIS or Remote Coding service.

When replacing the BCM also does not solve the error, the workshop contacts the DDTSB Hotline. Using big data from aftermarket workshops worldwide, we see that this problem and the procedure to solve it are very common, leading to the creation of a TSB based on solid statistics from our Hotline.

The scenario described was based on a workshop focusing their diagnosis on the communication error code between BCM and ECM. We also encounter workshops that focus on the alternator error code: 02252 – Generator. If the error is present and the workshop is experienced in diagnosing Linbus, they will eventually find the broken wire, which will also fix the communication error code (U014000).

Next time a workshop faces this problem, they will look up the fault code under bulletins and find this TSB:

DDTSB No. 10967

Issues like this with a wire break are common on almost all models. As a car ages, weak points in the wire loom will eventually fail, leading to tricky intermittent errors. With big data collection, it becomes clear how accurately a car is made, including its weak points. Eventually, they will all fail at this point, causing unique symptoms.

Example 2:

DPF/Eolys or Something Else?

This TSB is relevant to certain engine codes found in PSA/Stellantis models, which today include multiple brands/models:

Citroën Jumpy IV/Spacetourer (K0) 2020-> 2.0 BlueHdi (Euro 6.3 / 6.4)
Fiat Scudo/Ulysse (K0) 2022-> 2.0 MultiJet 3 (Euro 6.3 / 6.4)
Opel/Vauxhall Vivaro-C/Zafira Life (K0) 2020-> 2.0 BlueInjection (Euro 6.3 / 6.4)
Peugeot Expert IV/Traveller (K0) 2020-> 2.0 BlueHdi (Euro 6.3 / 6.4)
Toyota Proace/Proace Verso 2020-> 2.0 D (Euro 6.3 / 6.4)

Symptoms:

The particulate filter clogs due to a lack of regeneration
The service indicator may turn on too early
One or more fault codes stored:
- P119F 22 – Deterioration of the Engine Oil: Rate of Dilution of the Engine Oil Excessive
- P2463 97 – Particle Filter: Detected Overloaded
- P246C 97 – Particle Filter: Detected Overloaded

This problem is nearly impossible to find without this information. Using normal diagnostic procedures on DPF/Eolys will lead you nowhere with this error.

On these models, there is a service campaign addressing this issue. However, if you are not familiar with this problem and start a diagnosis the traditional way with measurements, you will spend a lot of time and end up with no clear result. This example demonstrates the value of workshops having access to the right information on all cars.

Select the car in DDTSB using license plate, VIN No., or manual search.
Go to bulletins.
Enter the fault code.

The program will now show all TSBs matching the fault code and the selected car.

DDTSB No. 10939

This search takes 30 seconds but can save you countless hours.

Example 3:

eCall/SOS System

E-call is mandatory in the EU and therefore needs to be in good working order to pass the yearly/bi-annual inspection. Aftermarket workshops will see an increase in vehicles with this system and need to prepare to service and repair these systems. The DDTSB Hotline has experienced a significant increase in questions about this system.

Typical Questions:

During maintenance inspection, we need to change the battery. Where is the SOS backup battery located?
Which antenna does this fault code address, and where is this antenna located?
During inspection, how should we check the system?

There are several ways to find information about this in DDTSB. If you need information related to maintenance (like the replacement of the SOS battery), select the car in DDTSB, go to bulletins, and select the category “Maintenance.” The program will list TSBs matching the selected car that are related to maintenance. See an example on a Hyundai Ioniq 5:

DDTSB No. 11056

Hyundai Ioniq 5 SOS Battery Replacement Procedure

The next time you do a maintenance job and lack information, consider this: Can I be the only aftermarket technician who would ask DDTSB about this? Probably not. So always select the category “Maintenance” first if you lack service-related information. If others have asked about it before, we will have a TSB available answering the subject.

Other popular maintenance TSBs you can find in DDTSB include:

Procedure for coolant bleeding
Procedure for oil change on automatic transmissions/DSG
Procedure for brake bleeding (especially on EVs)
Procedure for service reset
Procedure for TPMS
Sunroof service procedures
Special service procedures for specific models

DDTSB No. 10921.

SOS-System Antennas

We often encounter questions about the location of antennas. You might have a fault code:

B180B11 – LTE Antenna 2 – Short to Ground
B180B13 – LTE Antenna 2 – Open Circuit

But where is this antenna located? In VAG vehicles, you might even discover that the location of the antenna depends on the car’s equipment (PR-codes).

Below is an example from a Volkswagen T-Roc (A11) with the fault codes B180B11, B180B13.

Other related fault codes on VAG regarding the SOS-system:

B105313 – GPS Antenna, Disconnection
B105411 – GPS Antenna, Short-circuit to Ground
B105413 – GPS Antenna, Disconnection
B180B11 – LTE Antenna 2 – Short to Ground
B180B13 – LTE Antenna 2 – Open Circuit
B18BD11 – Mobile Communication Antenna 1 to Emergency Call Module and Communication Unit – Short-circuit to Ground
B18BE11 – Mobile Communication Antenna 2 to Emergency Call Module and Communication Unit – Short-circuit to Ground
B191604 – Backup Battery Faulty
B200047 – Control Unit Faulty
B200049 – Control Unit Faulty
B20004B – Control Unit Faulty
U111100 – Function Limitation due to Missing Message
U112100 – Databus, Missing Messages
U122C00 – Ethernet Databus Branch 1 – No Communication
U142100 – Control Unit to Emergency Call Module and Communication Unit/No Communication
U153E00 – Registration of Mobile Network is Not Possible
U164200 – Ethernet Emergency Call Module – No Communication
U178500 – Control Unit for Emergency Call Module and Communication Unit – Software Error