Service Notice and Precautions for EPS System
- Check the following items when performing the trouble diagnosis:
- Check any possible causes by interviewing the symptom and its condition from the customer if any malfunction, such as power steering warning lamp is turned ON, occurs.
- Check if air pressure and size of tires are proper, the specified part is used for the steering wheel, and control unit is genuine part.
- Check if the connection of steering column assembly and steering gear assembly is proper (there is not looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc.).
- Check if the wheel alignment is adjusted properly.
- Check if there is any damage or modification to suspension or body resulting in increased weight or altered ground clearance.
- Check if installation conditions of each link and suspension are proper.
- Check if the battery voltage is proper.
- Check if connection conditions of each connector are proper.
- Before connecting or disconnecting the power steering control module harness connector, turn ignition switch OFF and disconnect battery ground cable, because battery voltage is applied to power steering control module even if ignition switch is turned OFF.
- When connecting or disconnecting pin connectors into or from power steering control module, take care not to damage pin terminals (bend or break).
- During quick steering, rasping noise may be heard from under the vehicle. This is not a malfunction. The noise is an operating noise of the EPS system under normal conditions. If the rasping noise occurs during slow steering, this may not be an operating noise of the system. In this case, it is necessary to find out the location of the noise and repair, if necessary.