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Man TGA 18.413: Troubleshooting EBS 03293-00 & FFR 03179-08 Errors - Modulator or ALB Sensor?

KrzysiekGrd 14208 13
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  • #1 17143475
    KrzysiekGrd
    Level 10  
    Hello Users.
    I have a problem with errors:
    EBS 03293-00 and FFR 03179-08.

    I will describe the problem from the beginning. The car had a faulty EBS when it was purchased. The main error was 03290 which is no can communication. After checking the beam from the modulator to the ecu ebs, it turned out to be operational, so the decision was made to replace the rear axle modulator. After the replacement, it seemed that everything was fine because the indicators on the clocks, i.e. the red exclamation mark and yellow ABS, went out. But when you press the brake sometimes error EBS 03293-00 and FFR 03179-08 pops up and Ebs stops working. Sometimes it helps to put the car out and start it.
    My question is whether there is a faulty regenerated modulator or stick to the air pressure sensor in the pillow (ALB) or the installation from it to the modulator.
    It is a solo with a weight of 18 tons.

    I am asking for suggestions because I have no ideas anymore.
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  • #2 17144100
    darfur5
    Level 35  
    EBS 03293 00; protection against high pulse frequency, outlet valve active, pressure
  • #3 17144458
    KrzysiekGrd
    Level 10  
    darfur5 wrote:
    EBS 03293 00; protection against high pulse frequency, outlet valve active, pressure
  • #4 17144750
    darfur5
    Level 35  
    More like a sensor, although it may turn out to be green under the plug :D
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  • #5 17145121
    KrzysiekGrd
    Level 10  
    darfur5 wrote:
    More like a sensor, although it may turn out to be green under the plug :D

    You will have to look there even though it is tight. I had to struggle a bit to replace the modulator. It is a solo with a fixed structure.
    Tell me how many more sensors are there? I know they are 3 pin. One 3-pin cube enters the modulator, I suspect from this sensor because the rest is from ABS sensors and pad wear and one from can. So it turns out that there is one sensor and I thought there are 2 left and right sides.
    This sensor is somewhere on the pillow or on the tekalan wire?
    Thanks in advance.
  • #6 17145410
    citromaniak
    Level 23  
    There is only one sensor on the top of the pillow. The signal from 0.5v to 4.5v is to be depending on how the car is loaded. 24v or 5v power supply depends on the system
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  • #7 17145450
    KrzysiekGrd
    Level 10  
    citromaniak wrote:
    There is only one sensor on the top of the pillow. The signal from 0.5v to 4.5v is to be depending on how the car is loaded. 24v or 5v power supply depends on the system

    Ok. Thanks for the info. So there is only one sensor for the rear axle. No 2 sensors for left and right side.
    So, as I thought, because only one cube comes from the pillow pressure sensor or to the modulator.
  • #8 17146259
    Cobrat
    Level 22  
    Sorry, I will cut in, but the ALB sensor is whacked with a different error code ... I will look for it, because I also had this sensor, but it did not flush or the abs did not shine ...
  • #9 17146286
    KrzysiekGrd
    Level 10  
    Cobrat wrote:
    Sorry, I will cut in, but the ALB sensor is whacked with a different error code ... I will look for it, because I also had this sensor, but it did not flush or the abs did not shine ...

    I think ECAS 03151 or 03152 (left or right side) I do not have this error. But I know that EBS uses the ALB pressure sensor. The more loaded the vehicle, the greater the brake support force.
  • #10 17146312
    Cobrat
    Level 22  
    EBS 03022 or 3 is the error number strictly from the ALB sensor. You can look there, check the ankle, unscrew the sensor itself, no problem, the last pillow on the right side (right, i.e. the passenger ;) ) between the frame and the wheel on the upper cushion base. The sensor itself fits P&P from Scania 4, the cost of the new 300 something, I do not remember exactly, and if not, then for a scrap and for a change, just do not overpay ;) .

    PS. Is the car a manual or an automatic machine?

    Below is a nice description of this sensor (quote from the translator):
    "ebs 03022 -00 incorrect axial load

    The braking systems of the previous generation were equipped with a pneumatically controlled brake force regulator (ALB - Automatisch Lastabhängiger Bremskraftregeleinrichtung, automatic brake force regulator operating according to the vehicle load)
    The regulators were controlled mechanically (pushed from the regulator to the bridge) or pneumatically (controlled from the suspension airbags).

    In electronic braking systems (directly in the EBS (knorr) 2 - 2.3 system) the LSV sensor (installed at the rear right (in the direction of travel) of the air cylinder) is used to calculate the braking forces depending on the vehicle load.
    In the sensor, various pressures (in the suspension airbags) are converted into electrical voltage signals.
    With these signal values, the brake pressure characteristic is correlated, according to which the EBS electronic unit regulates the pressure in the brake cylinder
    The error indicates a malfunction of this sensor (wiring, sensor itself ...)
    00 - the error is not defined
    The sensor can also "damage" - ie they produce incorrect signal values under all conditions. "
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  • #11 17146327
    KrzysiekGrd
    Level 10  
    Cobrat wrote:
    EBS 03022 or 3 is the error number strictly from the ALB sensor. You can look there, check the ankle, unscrew the sensor itself, no problem, the last pillow on the right side (right, i.e. the passenger ;) ) between the frame and the wheel on the upper cushion base. The sensor itself fits P&P from Scania 4, the cost of the new 300 something, I do not remember exactly, and if not, then for a scrap and for a change, just do not overpay ;) .

    PS. Is the car a manual or an automatic machine?

    Below is a nice description of this sensor (quote from the translator):
    "ebs 03022 -00 incorrect axial load

    The braking systems of the previous generation were equipped with a pneumatically controlled brake force regulator (ALB - Automatisch Lastabhängiger Bremskraftregeleinrichtung, automatic brake force regulator operating according to the vehicle load)
    The regulators were controlled mechanically (pushed from the regulator to the bridge) or pneumatically (controlled from the suspension airbags).

    In electronic braking systems (directly in the EBS (knorr) 2 - 2.3 system) the LSV sensor (installed at the rear right (in the direction of travel) of the air cylinder) is used to calculate the braking forces depending on the vehicle load.
    In the sensor, various pressures (in the suspension airbags) are converted into electrical voltage signals.
    With these signal values, the brake pressure characteristic is correlated, according to which the EBS electronic unit regulates the pressure in the brake cylinder
    The error indicates a malfunction of this sensor (wiring, sensor itself ...)
    00 - the error is not defined
    The sensor can also "damage" - ie they produce incorrect signal values under all conditions. "

    So there is nothing else but to check the sensor and the installation from it. Thanks also for the help on the topic.
  • #12 17147425
    darfur5
    Level 35  
    In the EBS5 and ECAS2 systems, the ALB is replaced with a pressure sensor installed in the upper part of the cushion base on the left-hand drive axle. The sensor cooperates with EBS, ECAS, FFR, thanks to which you can check the axle load on the display screen.
  • #13 17163719
    svavecone
    Level 25  
    FFR 03179-08 ..... FFR controller complains about lack of information from EBS about the load of the vehicle, ALB sensor. But if there is no similar bug in EBS then don't bother with it.
    EBS 03293 error has a high priority and EBS does not send data with a lower priority, which is the vehicle load.
    Focus on the EBS ...... and this error, if the pressure indicators in circulation I and II are operational, unfortunately the damaged module has been hit.
  • #14 17203787
    KrzysiekGrd
    Level 10  
    svavecone wrote:
    FFR 03179-08 ..... FFR controller complains about lack of information from EBS about the load of the vehicle, ALB sensor. But if there is no similar bug in EBS then don't bother with it.
    EBS 03293 error has a high priority and EBS does not send data with a lower priority, which is the vehicle load.
    Focus on the EBS ...... and this error, if the pressure indicators in circulation I and II are operational, unfortunately the damaged module has been hit.

    Thanks for your interest and help. The problem solved itself. All these errors appeared after replacing the modulator. After resetting errors and driving for a long time, the problem does not occur and everything works as it should, regardless of whether the vehicle is loaded or empty. best regards
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Topic summary

The discussion revolves around troubleshooting EBS error codes 03293-00 and FFR 03179-08 on a Man TGA 18.413 vehicle. The user initially faced a communication error (03290) and replaced the rear axle modulator, which temporarily resolved the issue. However, the EBS errors reappeared intermittently when braking. Participants suggested that the problem might stem from the ALB pressure sensor or its installation, emphasizing the importance of checking the sensor's functionality and connections. It was noted that the EBS system relies on the ALB sensor for load information, and if the EBS system is malfunctioning, it could prevent the FFR controller from receiving necessary data. Ultimately, after resetting the errors and extended driving, the user reported that the issues resolved themselves, indicating that the modulator replacement may have corrected the underlying problem.
Summary generated by the language model.
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