MAN TG3 Additional Axle Steering Hydraulic Wiring Diagrams – ESA Control Unit, Steering Angle Sensor, Valve Block & CAN Monitoring

This technical wiring manual contains the complete electrical schematics for the electronically controlled additional axle steering and hydraulic steering monitoring systems used in MAN TG3 trucks.

The diagrams include the full control architecture for the ESA steering control unit, steering angle sensors, hydraulic valve control circuits, pressure and flow monitoring sensors, CAN communication routing and electrical supply connections.

All circuits include connector identifiers, system references and grounding architecture required for professional diagnostics, repair or steering system troubleshooting.

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Additional Axle Steering System Components

• ESA steering control unit (AV805.1)

• Steering angle sensor VLA/NLA (B284.1)

• Steering oil tank switch (B432.1)

• Control valve for steering system (Y333.1PT)

• Central electrical system (A100.1)

These components form the electronically controlled steering architecture for additional or trailing axles.

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Hydraulic Steering Monitoring Components

• Valve block for two-circuit steering (A627.1)

• Steering gearbox 1.5 circuit (A806.1)

• Pressure switch trailing axle (B470.1)

• Flow gauge sensors (B552.1 / B552.2)

• Steering oil tank switch (B371.1)

These components monitor hydraulic steering performance and provide diagnostic feedback to vehicle electronics.

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CAN Bus and Electronic Communication

• C-CAN communication routing for ESA control

• I-CAN communication through RIO module

• CAN communication through EIO1 module

• Steering monitoring feedback signals transmitted to control modules

The steering electronics communicate through vehicle CAN networks for monitoring, diagnostics and control logic.

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Electrical Supply and Ground Routing

• Terminal +30 electrical supply routing

• Fuse protection for ESA system (F1700 – 10A)

• Ground network SYS_groundNet references

• Sensor supply and PWM valve control wiring

These protected circuits ensure stable electrical operation of steering control electronics and hydraulic monitoring sensors.

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Wiring Harness Interfaces

• Cab-frame connectors X6301 / X6302

• Frame steering harness connectors X6408 / X6478

• Steering monitoring separation connector X6490

• System carrier wiring interfaces

These harness references allow full diagnostic tracing of steering electrical circuits and hydraulic monitoring wiring paths.

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Diagnostic Use Cases

• additional axle steering not responding

• steering angle sensor signal faults

• hydraulic steering pressure errors

• steering oil level switch malfunction

• CAN communication steering faults

• valve control signal errors

• electrical routing or fuse issues

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Compatible Vehicles

• TGX

• TGS

• TGM

• TGL

MAN TG3 platform trucks equipped with electronically controlled additional axle steering and hydraulic steering monitoring systems.

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Technical Highlights

• Complete OEM additional axle steering wiring diagrams

• ESA steering control unit architecture included

• Steering angle sensor wiring included

• Hydraulic pressure and flow monitoring circuits included

• CAN communication routing shown

• Full harness routing references included

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Table of Content

Additional Axle Steering System

• ESA control unit wiring

• Steering angle sensor circuits

• Steering valve control wiring

Hydraulic Monitoring System

• Flow gauge sensor wiring

• Pressure switch circuits

• Steering oil level monitoring

Electronic Communication

• C-CAN routing

• I-CAN routing

• Control module feedback signals

Electrical Infrastructure

• Central electrical system supply

• Fuse protection routing

• Ground network references

Wiring Harness Interfaces

• Cab-frame connectors

• Steering frame connectors

• Monitoring separation connectors

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