MAN TG3 Electrical Power Supply Wiring Diagram – TGX/TGS Euro 6d (Q4 2020)

This official wiring diagram provides a complete overview of the Electrical Power Supply System in MAN TG3 TGX/TGS Euro 6d trucks, based on the Q4 2020 release by MAN Truck & Bus SE (Werk München). It maps every critical power distribution point — from battery to fuse block, alternator to control units — including CAN and LIN architecture for the entire electrical backbone.

⚡ Key components included:

• Zentralelektrik (A100.1) – Central fuse and relay box
• Battery system (Battery 1 & 2) with jump-start socket
• Starter motor (M100.4) and Alternator (G102.2)
• RIO Module (A1358.1) and fuse protection (F1515–F1518)
• Battery main fuses: F354.1, F355.1
• Grounding logic (SYS_groundNet) and cabin/frame harness routing
• CAN & LIN routing to CVM, EIO modules, infotainment, and diagnostic interfaces
• Battery cut-off switch (Q105.2), Diode packs, and steering lock (Q101.1)

🛠️ Ideal for:

• Deep diagnostics of electrical faults or no-start conditions
• Retrofits involving RIO, EIO, or CVM control units
• Electrical upgrades (battery, fuse layout, cab extensions)
• Workshop schematic referencing for high-voltage path tracing

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