When the ignition is switched on, the electric power steering control unit provides information (fault code light) about malfunctions in the operation of the power steering by flashing the warning light in the instrument cluster. The time parameters of the light code are presented in Table. 9.10.
Table 9.10. Light codes of malfunctions of the electroamplifier of a steering (EURU)
Type of malfunction of the electric power steering | Signaling device operation mode |
No engine speed signal EURU Torque Sensor Malfunction EURU engine malfunction Malfunction of the steering shaft position sensor EURU Malfunction of the EURU rotor position sensor Low voltage of the car's on-board network EURU controller malfunction No Vehicle Speed Sensor Signal | 1 long, 2 short* 1 long, 3 short 1 long, 4 short 1 long, 5 short 1 long, 6 short 1 long, 7 short 1 long, 8 short 1 long, 9 short |
* The burning time of the control lamp indicates whether the signal belongs to a long or short one:
- the duration of the initial pause - 2 s;
- long signal duration - 2 s;
- short signal duration - 0.5 s;
- pause duration between signals - 0.5 s;
- the duration of the pause between fault codes is 2 s.