Mercedes MP4 EBS3-EBS4 Control Unit Faults
The EBS3 and EBS4 control units play a vital role in the braking performance of Mercedes MP4 trucks. However, when faults develop within these systems, they can lead to warning lights, braking issues, or even full system failure. As a result, it’s essential to recognise early warning signs and take action promptly. In many cases, these faults build up gradually and go unnoticed until more serious problems appear. Therefore, understanding the causes can help prevent unexpected downtime. In this article, we’ll explore the most common control unit faults, highlight their impact, and explain how they can be diagnosed and repaired professionally.
Common Faults:
- Low voltage detected at Terminal 30 (undervoltage)
- Low voltage detected at Terminal 15 (undervoltage)
- Communication problems with CAN 3 (EBS module not visible)
- Fault within the trailer CAN system
- Issue detected with rear axle steering
CAN Faults
CAN 3, CAN 6a, CAN 6B, CAN 6D, CAN 11
Common EBS3 and EBS4 Control Unit Faults in Mercedes MP4 Vehicles
Undervoltage at Terminal 30
To begin with, one of the most common issues reported with these units is low voltage at Terminal 30. This fault can trigger dashboard warnings, braking issues, or irregular behaviour during start-up. In many cases, this is linked to internal damage within the control unit. Because of this, many vehicles require professional repair to restore proper function. Therefore, early action can help prevent related system faults and costly downtime.
Undervoltage at Terminal 15
In addition, undervoltage at Terminal 15 is a well-known cause of EBS faults in Mercedes MP4 models. When this occurs, the unit may fail to initialise or shut down intermittently. As a result, warning lights and fault codes can appear, even when the rest of the electrical system appears normal. Moreover, such faults often suggest issues deep within the EBS module, which cannot be resolved externally. Consequently, professional intervention is usually required.
Communication Issues on CAN 3
Similarly, communication faults on the CAN 3 network can cause the EBS module to vanish from the system. In these cases, diagnostics may fail to detect the unit, and other modules may show related faults. Also, vehicle performance can suffer due to missing signals between systems. Due to the complex nature of CAN faults, internal failure of the EBS unit is frequently the root cause. Therefore, in-depth testing and module-level repair are often necessary.
Faults Within the Trailer CAN System
Another common problem involves the trailer CAN system. When communication fails between the trailer and the vehicle’s EBS module, braking control and ABS feedback may be affected. Additionally, the dashboard may display trailer-related warnings. Even if connectors and wiring appear fine, internal breakdowns in the control unit can still be responsible. For this reason, these faults should not be dismissed without professional evaluation.
Rear Axle Steering Faults
Finally, issues with rear axle steering may also be linked to the EBS3 or EBS4 unit. For example, drivers might experience reduced manoeuvrability, error messages, or complete steering failure. Furthermore, these problems often appear alongside other electronic faults. In many instances, the EBS unit is unable to process or relay data from the steering sensors. As a result, sending the module in for specialist repair is the most reliable way to restore full system function.
Part Numbers
EBS3, EBS4, EBS 3, EBS 4, EBS-3, EBS-4, A 000 446 87 36, A 000 446 98 36, A 000 446 99 36, A 001 446 05 36, A 001 446 09 36, A 001 446 10 36, A 001 446 24 36, A0004468736, A0004469836, A0004469936, A0014460536, A0014460936, A0014461036, A0014462436, A0014469936, A0014469836, A0014462736, A0014463236, A0014461036, A0014460539, A0014469036, A0004469036, A 001 446 99 36, A 001 446 98 36, A 001 446 27 36
A 001 446 32 36, A 001 446 10 36, A 001 446 05 39, A 001 446 90 36, A 000 446 90 36, A0014460536, A0004469936, A0014460936, A0014460539, A0014469836, A0014462436, A0014463236, A0014462736, 446 130 204 0, 446 130 212 0, 446 130 213 0, 446 130 220 0, 446 130 221 0, 447 130 208 0, 447 130 210 0, 4461302040, 4461302120, 4461302130, 4461302200, 4461302210, 4471302080, 447130210 0, 4461302100, 4461302080, 4461302220, 4461302230, 4461302050, 446 130 2100, 446 130 2080, 446 130 2220, 446 130 2230, 446 130 2050
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Common Questions:
We at Essex Recons strive to exceed your expectations in the quality of our repairs. We aim to complete our repairs in a timely fashion while adhering to all ESD safety measures when working on sensitive equipment.
These units come with a 36 month warranty.
To pay for the rebuild, simply click the product link(s) above to select the module you require. After that, place your order directly through our website. Once your order is complete, carefully package your unit inside a sturdy box with plenty of protective material. In addition, make sure you include your contact details and order number inside the box. Then, send your package to us using a tracked courier service. As soon as we receive your unit, we will test, rebuild, and return your module, complete with a 36-month warranty.
To get your unit collected, simply give us a call on 01708 206343 for your free collection. Then, you will be able to speak to a friendly member of our team who will guide you through the collection process.
