# Function Diagram – SSP 259 EPHS – Electrically Powered Hydraulic Steering

> Function diagram of the EPHS with control units J500, J220, J285, J519 and J533, sensors G250 and G22, warning lamp K92 and the CAN lines.

- Web page: https://catalog.polo.blue/self-study/ssp-259-electro-hydraulic-power-steering/function-diagram/
- Original document (PDF): https://cdn.polo.blue/files/ssp-259-electro-hydraulic-power-steering.pdf

Example: TRW steering system without Electronic Stability Programme (ESP)

![Function Diagram (259\_022)](https://catalog.polo.blue/instructions/ssp-259/8ab74955fe2c2c2d.webp)

## Legend

![Legend](https://catalog.polo.blue/instructions/ssp-259/a2fbceb88b3c9e93.webp)

- **G22** Speedometer sender
- **G250** Power steering sensor
- **J220** Motronic control unit
- **J285** Control unit in dash panel insert
- **J500** Power steering control unit
- **J519** Electrical system control unit
- **J533** Databus diagnostic interface
- **K92** Servotronic warning lamp
- **S** Fuse

> **Note**
>
> The function diagram is not a current flow diagram.