Description
PLD MR Major Repair Services – Mercedes-Benz MP1, MP2, MP3 ECU Restoration
PLD MR Major Repair Services are essential when a Mercedes-Benz Actros, Axor or Atego suffers serious ECU failures. The PLD/MR module controls fuel injection, engine timing, starter logic, torque management, immobiliser communication and CAN network signalling. When this module becomes damaged or corrupted, the truck may refuse to start, drop into limp mode, or lose injector control entirely.
Autolectronix specialises in professional, component-level PLD MR major repairs, restoring damaged ECUs to full working condition. This service is designed for heavily compromised units where faults extend beyond simple misfires or basic software issues.
PLD MR Major Repair Services Overview
Major repairs are recommended when the PLD/MR module exhibits severe electrical failure such as:
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No power to ECU
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CAN network not communicating
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Water damage or corrosion
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Burnt tracks or failed components
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Starter actuator circuit faults
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Plug meltdown or broken connectors
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Repeated engine cut-outs or ECU resets
These failures cannot be resolved through basic repair steps. Our PLD MR Major Repair Services are designed to completely restore the ECU’s internal circuitry and logic functions.
What Our PLD MR Major Repair Service Includes
1️⃣ Full Diagnostic Evaluation
We begin with a complete bench test to identify:
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Power supply faults
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CAN communication failure
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Sensor reference output issues
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Injector driver faults
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Short circuits or burnt components
2️⃣ Component-Level Repair
Our technicians rebuild damaged circuitry using OEM-grade components. This includes:
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Replacing burnt transistors, drivers, and regulators
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Rebuilding corroded or cracked PCB tracks
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Restoring 5V/12V reference outputs
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Repairing CAN and injector control stages
3️⃣ Corrosion Damage Treatment
Water ingress is a common cause of ECU death. We:
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Clean and deoxidise the PCB
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Repair corroded solder joints
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Replace damaged plug terminals if needed
4️⃣ Programming, Flashing & Calibration
Where required, we:
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Reflash the unit to the correct engine/vehicle variant
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Correct HP/torque configuration
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Ensure compatibility with gearbox, FR and CPC modules
5️⃣ Final Bench Testing
The repaired module undergoes full operational simulation including:
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CAN communication
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Injector driver testing
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Power-on behaviour
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Idle and load conditions
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Sensor reference and feedback signals
Only once the unit passes all tests do we send it back to you.
⚠️ Important Notes
Transponderisation Not Included
Key programming or immobiliser pairing is a separate service.
If required, use PLD MR Transponderisation.
Misfire Repairs
If only Bank 1 or Bank 2 injector drivers are faulty, this falls under Misfire Repair, not Major Repair.
🔗 Related Products & Helpful Accessories
Aging wiring and connectors can cause poor performance and intermittent ECU faults. We recommend replacing worn connectors when fitting a new ECU.
Replacing cracked plugs or damaged keys alongside your new ECU ensures long-term reliability.
Common Symptoms That Require Major Repair
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No ECU communication
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Engine cranks but will not start
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ECU not powering on
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Random cut-outs while driving
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Corrosion around plug areas
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Burnt or melted connectors
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Repeated ECU fuse failures
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Internal ECU fault codes
Supported Vehicles & Applications
Our major repair services support:
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Actros MP1 / MP2 / MP3
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Axor MP1 / MP2 / MP3
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Atego MP1 / MP2 / MP3
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Fuso Trucks (with PLD/MR engines)
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Bell Equipment (mining & construction)
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Marcopolo Buses
Supported Part Numbers
A0001501279
A0001501479
A0001501579
…and most PLD MR ECU generations.
If your number is missing, contact us—we’ll confirm compatibility.
Why Choose Autolectronix?
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Over 10 years’ experience with Mercedes PLD/MR systems
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Advanced diagnostic and repair capability
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Full ECU simulation testing before dispatch
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3-month warranty on major repairs
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Fast turnaround
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No fix, no fee on most electronic issues
Fleet owners trust us to restore their vehicles quickly and reliably.
Contact Autolectronix
📧 sales@autolectronix.co.za
📞 +27 31 700 1420
📍 Unit 4 Lubex House, 4 Ivy Road, New Germany, KZN