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

DESCRIPTION

When the ignition switch is turned to ON, 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.

WIRING DIAGRAM

A01V85KE15

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY (IGB VOLTAGE)


    1. A01V8FRC42
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the Z6 millimeter wave radar sensor assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Z6-8 (IGB) - Bodyground Ignition switch ON

      11 to 14 V*1

      10.5 to 16 V*2
      *1: w/o Stop and Start System
      *2: w/ Stop and Start System

    4. Reconnect the Z6 millimeter wave radar sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE POWER SOURCE CIRCUIT

    OK

  2. CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)


    1. Disconnect the Z6 millimeter wave radar sensor assembly connector.

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

      Standard Resistance
      Check for Open
      Tester Connection Condition Specified Condition
      Z6-1 (SGND) - Body ground Always Below 1 Ω

    3. Reconnect the Z6 millimeter wave radar sensor assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR