EPS system

EPS system (4WAS main control unit) enters the fail-safe mode (that allows the steering force to be controlled without impairing the drive ability) if the input from each sensor is not within the specified range. Then, 4WAS warning lamp turns ON.

Fig 1: Solenoid Valve Voltage Graph

Courtesy of NISSAN MOTOR CO., U.S.A.

DTC CHART

Mode	Warning lamp	DTC	Detected area (Error area)	Error part and root cause
Fail-safe	Turn-ON	C1919	ABS actuator and electronic unit (control unit)	Vehicle speed signal error