MAN TGA Full Wiring Diagram. Electrical System

Detailed electrical diagram of the MAN TGA truck for diagnostics and repair of electrical equipment. Includes connection diagrams, wire designations, location of components and connectors, as well as information on the CAN bus.

📘 In the diagrams you will find:

• Full electrical diagram of the MAN TGA (lighting, starting, charging, sensors, braking system)
• Color marking of wires and contact numbers
• Location of relays, fuses, ECU units
• CAN bus, I-Shift control, ABS, EBS
• Simplified diagnostics using diagrams

⚡ Suitable for:

• All modifications of MAN TGA: tractors, chassis, dump trucks
• Electricians, service stations, mechanics, MAN truck owners

🛠 Format:

• Convenient PDF file
• Suitable for printing and working on a tablet or laptop

Engine: D20/D26 Common Rail, D28, D2876, D2866, D2840/D2842

• General>>
• MAN Home Page>>
• MAN TGA Workshop Manual>>

🔌 1. Frayed and broken wires

Where it occurs: most often in bends - between the cabin and the frame, in doorways, behind the battery box.

Symptoms: flashing panel, power failure, unstable operation of lighting or control unit.

Solution: visual inspection, wiring test, replacement of damaged sections.

⚠️ 2. Corrosion of connectors and poor ground contact

Typical for: fuse boxes, ECU connectors, rear of the frame.

Symptoms: CAN bus errors, lighting failures, spontaneous restarts of units.

Solution: cleaning, treatment with protective grease, replacement of connectors and ground mounting points.

💡 3. Sensor malfunctions

Frequently fail:

ABS sensor on wheels (due to dirt or broken cable)

AdBlue level sensor

Coolant temperature sensor

Symptoms: errors on the panel (e.g. EBS, SCR), systems shutdown.

Solution: scan with a diagnostic scanner, check the wiring to the sensor, replace.

🔋 4. Problems with the battery and starter circuit

Symptoms: poor starting, low voltage error, blinking instruments.

Causes: oxidized terminals, voltage drop, worn wires.

Solution: check the voltage under load, clean the contacts, replace the terminals or wires.

🧠 5. Failures of electronic units (VECU, FFR, EDC)

Symptoms: complete loss of communication with modules, constant errors, non-working systems (e.g. window lifters, headlights, climate control).

Reasons: poor power supply, software failures, damaged wiring or CAN bus failure.

Solution: reflashing, checking power supply and ground circuits, replacing the unit if necessary.