An HGV trailer ECU (Electronic Control Unit) is an onboard computer that manages key safety and performance systems, primarily braking and suspension.
Powered via the ISO 7638 electrical connection from the tractor unit, the ECU receives and processes real-time data to optimise trailer behaviour under varying conditions.
Common systems controlled by the ECU include:
- EBS – Electronic Braking System for responsive, proportional braking control
- ABS – Anti-lock Braking System to prevent wheel lock-up during emergency stops
- Load-Sensing – Automatically adjusts brake force based on axle load
- Air Suspension – Manages ride height and load levelling
- RSS – Roll Stability System to reduce the risk of trailer rollover
The trailer ECU plays a vital role in enhancing safety, maintaining compliance, and improving driving dynamics under all load conditions.
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