MAN TG3 Heavy Duty Wiring Diagrams – Central Hydraulics & Load Switching (Q4 2020)

This official 3-page schematic from MAN Truck & Bus SE – Werk München, dated Q4 2020, outlines the Heavy Duty (Schwerlast) system wiring for MAN TG3 TGX/TGS Euro 6d trucks. It includes solenoid controls, axle load switching, and ECAS enhancements tailored for vehicles operating under heavy-load or municipal utility conditions.

Key coverage includes:

🔹 Page 1 – Central Hydraulic System:

• EIO2 module (AP030 – A1360.1)

• Switch: SP015 (S821.1) – Central hydraulics

• Solenoids:

  • Y393.1 – Magnetventil 1

  • Y394.1 – Magnetventil 2

  • Y395.1 – Magnetventil 3

• CAN communication: CAN1 High/Low

• Ground and power from: SYS_groundNet, SYS_electricalPowerSupply

🔹 Page 2 – Axle Load Switching (Achslastumschaltung):

• Solenoids:

  • Y424.1 – Switch axle load

  • Y512.1 – Switch load off

• Pressure switch: B479.1 (B236)

• Relay: K796.1 (K281), Fuse: F679.1 (F111)

• Connections via: X6409, Zentralelektrik (A100.1)

🔹 Page 3 – ECAS Moving-Off Aid & Axle Lift:

• Solenoids:

  • Y166.1 – Moving-off aid

  • Y167.1 – Trailing axle lift

• Switches:

  • S266.1 – ECAS NLA/VLA control

  • S267.1 – ECAS start-aid button

• Pressure switches: B201.1 (Left), B202.1 (Right)

• Integrated via EIO2 module and LIN bus (LIN4)

🧩 Connectors: X6413, X6409, X6395, XV805, X6301
🔌 Harnesses referenced: 81.25432-0017, 81.25435-6220, 81.25432-0548, 81.25475-0433

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