Millimeter Wave Radar Sensor Power Source Circuit

Millimeter Wave Radar Sensor Power Source Circuit

DESCRIPTION

This circuit provides power to the millimeter wave radar sensor. The millimeter wave radar sensor emits radio waves towards an object in front and measures the distance and direction of the object by receiving the wave reflections. Based on the reflections, the sensor calculates the difference in speed between the vehicle and the object in front. This data is transmitted to the distance control ECU. The ECU recognizes the millimeter wave radar sensor via terminals LAND. If an open circuit occurs in the wire harness between terminals LAND, the ECM cannot recognize the millimeter wave radar sensor. The ECM will stop the control of the vehicle-to-vehicle distance control mode and only the constant speed control mode can be used.

Wiring Diagram:

Step 1-2:

Step 3:

INSPECTION PROCEDURE

NOTE:
- When the distance control ECU and/or ECM are replaced with a new one, initialization must be performed.
- When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed.