| 摘要 |
<p>PURPOSE:To achieve both ensuring detection of welding a motor power relay and quickness of control start timing of a rear wheel steering angle, in an electric motor-driven four-wheel steering device for controlling the rear wheel steering angle by an electric motor. CONSTITUTION:A device is provided with a rear wheel steering angle control means (g) for performing a welding check of a motor power relay (c) before starting rear wheel steering angle control, to early start control in the case of the relay (c) not welded and to again perform a check in the case of the relay (c) doubtful of welding, and starting the control after confirming no welding.</p> |
