MAN D28 Inline & D28V Diesel Engine Service Manual

Technical Scope of the MAN D28 and D28V Monitoring System

• Built for the 2003 MAN D28 and D28V Marine Diesel Engines, covering EDC and mechanically controlled injection configurations including the MMDS (Monitoring Diagnostic System)
• Official MAN Nutzfahrzeuge Aktiengesellschaft publication P/N 51.99598−8117, technical status 09.2003
• Contains 56 detailed system diagrams and connection schematics, alongside sensor testing tables and pinout reference guides
• Stored data includes records of the last 8000 alarm events and 50 detailed history logs with engine status data
• Re-download the file any time, no expiration
• OCR text layer lets you jump to a torque spec by keyword
• This edition serves as the primary reference for the MMDS integration used during the 2003 product cycle, documenting the specific hardware interfaces for both CAN and serial bus architectures

Diagnostic and Monitoring Coverage

This documentation details the hardware and diagnostic architecture of the Monitoring Diagnostic System. It explains the integration of the central diagnostic unit in the terminal box, providing reference information for the serial and CAN bus systems used across different engine variants. Major topics include sensor location and testing, communication protocols, relay output configurations, and the function of the MMDS-LC and MMDS-L display units. Additional segments describe the operation of the D/A converters, serial distribution boxes, and the procedures for programming general ship alarms.

Specification and Reference Data

Technical data is provided for sensor testing and signal evaluation. It covers 4–20 mA pressure transducer testing, resistance-based temperature sensor checks (PT 1000 and Ni 1000), and terminal pinout assignments for the diagnostic units. System settings such as voltage conversion from 12V to 24V and communication interface pinouts are documented for site-specific integration. Sensor measurement values are listed, including boost pressure ranges of 0–2.5 bar and cooling system thresholds. For more information on how factory workshop documentation is structured refer to our resource index. This 159-page technical publication provides the necessary data for technicians to install, configure, and maintain the MAN D28 and D28V engine monitoring system and its associated diagnostic components.