Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCEDES BENZ2025SPRINTER 3500XD 2D CAB CHASSIS EXTENDED, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 384 (MODULE COMMUNICATIONS NETWORK SYSTEM)
2025 Mercedes Benz Sprinter 3500XD 2D Cab Chassis Extended, RWD
Section 384 (Module Communications Network System)
2025 Mercedes Benz Sprinter 3500XD 2D Cab Chassis Extended, RWDSECTION Section 384 (Module Communications Network System)
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Communications Network
- Smart Junction Box (SJB)
- Notes
- Driver Seat Module (DSM)
- Powertrain Control Module (PCM)
- Instrument Cluster
- Restraint Control Module (RCM)
- Anti-Lock Brake System (ABS) Module
- Dual Automatic Temperature Control (DATC) Module
- Speed Control Actuator
- Parking Aid Modules - Four Sensor And Eight Sensor
- Driver Or Passenger Climate Controlled Seat Module
- Right Hand (RH) and Left Hand (LH) Power Sliding Door (PSD) Modules
- Power Liftgate Module
- Principles Of Operation
- Smart Junction Box (SJB)
- Module Configuration
- Module Controlled Functions
- Communications Network
- Diagnosis And Testing
- Diagnostic Trouble Code Chart
- Communications Network
- Notes
- Special Tool(s)
- Inspection And Verification
- System Precheck
- Symptom Chart
- Connector Circuit Reference
- Data Link Connector (DLC) C251
- Speed Control Actuator C122
- Anti-Lock Brake System (ABS) Module C155
- Powertrain Control Module (PCM) C175
- Instrument Cluster C220a
- Dual Automatic Temperature Control (DATC) C228a and A/C Manual Function Selector Switch C294a
- Dual Automatic Temperature Control (DATC) C228b
- Restraint Control Module (RCM) C310a
- Driver Seat Module (DSM) C341a
- Driver Seat Module (DSM) C341c
- Smart Junction Box (SJB) C2280a
- Smart Junction Box (SJB) C2280b
- Smart Junction Box (SJB) C2280h
- Driver Temperature Controlled Seat Module C3031a and Passenger Temperature Controlled Seat Module C3036a
- Left Hand (LH) Power Sliding Door (PSD) Module C3072a and Right Hand (RH) Power Sliding Door (PSD) Module C3071a
- Parking Aid Module C4014-8 sensor (front and rear)
- Power Liftgate Module C4174a
- Parking Aid Module C4226-4 Sensor (Rear Only)
- Pinpoint Test A: The Smart Junction Box (SJB) Does Not Respond To The Diagnostic Tool
- Pinpoint Test B: The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test C: The Powertrain Control Module (PCM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test D: The Instrument Cluster Does Not Respond To The Diagnostic Tool
- Pinpoint Test E: The Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test F: The Anti-Lock Brake System (ABS) Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test G: The Dual Automatic Temperature Control (DATC) Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test H: The Speed Control Actuator Does Not Respond To The Diagnostic Tool
- Pinpoint Test I: The Parking Aid Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test J: The Driver/Passenger Climate Controlled Seat Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test K: The Left Hand (LH) or Right Hand (RH) Power Sliding Door (PSD) Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test L: The Power Liftgate Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test M: No Universal Asynchronous Receiver-Transmitter (UART)-Based Protocol (UBP) Network Communication
- Pinpoint Test N: No International Standards Organization (ISO) 9141 Network Communication
- Pinpoint Test O: No Standard Corporate Protocol (SCP) Network Communication
- Pinpoint Test P: No Module/Network Communication - No Power To The Diagnostic Tool
- General Procedures
- Programmable Module Installation
- Using The New Generation STAR (NGS) Tester When The Original Body Chassis Electrical Module Is Not Available
- Using The New Generation STAR (NGS) Tester When The Original Body Chassis Electrical Module Is Available
- Using The Worldwide Diagnostic System (WDS) When The Original Body Chassis Electrical Module Is Not Available
- Using The Worldwide Diagnostic System (WDS) When The Original Body Chassis Electrical Module Is Available
- Programmable Module Installation
- Removal And Installation
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.