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
Watch the new training video I made about the SOS system in the Education section in DDTSB.
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