Millimeter Wave Radar Sensor Power Source Circuit

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Millimeter Wave Radar Sensor Power Source Circuit
- Millimeter Wave Radar Sensor Power Source Circuit

DESCRIPTION

This circuit provides power to the front millimeter wave radar sensor. The front millimeter wave radar sensor emits radio waves towards an object in front and measures the distance and direction of the object by receiving the beam 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 driving support ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (FRONT MILLIMETER WAVE RADAR SENSOR - DRIVING SUPPORT ECU)





(a) Disconnect the B9 sensor connector.

(b) Disconnect the A33 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK DRIVING SUPPORT ECU (IGB VOLTAGE SIGNAL)





(a) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Dynamic Radar Cruise Control System