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

DESCRIPTION

When the power switch is turned on (IG), auxiliary battery voltage is applied to terminal IGB of the millimeter wave radar sensor assembly.

This circuit provides power to the millimeter wave radar sensor assembly. The millimeter wave radar sensor assembly 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 assembly.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK TERMINAL VOLTAGE (POWER SOURCE OF MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

   
   
   1. 

      *a	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the B8 millimeter wave radar sensor assembly connector.

   2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition B8-5 (IGB) - Body ground Power switch on (IG) 11 to 14 V B8-5 (IGB) - Body ground Power switch off Below 1 V

      Standard Resistance
      Tester Connection Condition Specified Condition B8-1 (SGND) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - AUXILIARY BATTERY AND BODY GROUND)