Dynamic Radar Cruise Control System Millimeter Wave Radar Sensor Power Source Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - DISTANCE CONTROL ECU)

CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)

CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - ECM AND BODY GROUND)

DYNAMIC RADAR CRUISE CONTROL SYSTEM - 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.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Millimeter Wave Radar Sensor Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
When the distance control ECU is replaced with a new one, initialization must be performed (Click here).
1.CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - DISTANCE CONTROL ECU)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Millimeter Wave Radar Sensor Power Source Circuit

  1. Disconnect the A56 millimeter wave radar sensor connector.

  1. Disconnect the E108 distance control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A56-2 (SGND) - E108-10 (SGND)
    		Always
    		Below 1 Ω
    A56-5 (IGB) - E108-13 (IGB)
    E108-13 (IGB) - Body ground
    		Always
    		10 kΩ or higher
    A56-5 (IGB) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Millimeter Wave Radar Sensor Power Source Circuit

  1. Disconnect the A56 millimeter wave radar sensor connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A56-5 (IGB) - A56-2 (SGND)
    		Engine switch on (IG)
    		11 to 14 V


NG
REPLACE DISTANCE CONTROL ECU (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - ECM AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Cruise Control.Cruise Control System.Dynamic Radar Cruise Control System Millimeter Wave Radar Sensor Power Source Circuit

  1. Disconnect the A56 millimeter wave radar sensor connector.

  1. Disconnect the A38*1 or A52*2 ECM connector.

    1. *1: for LHD
    2. *2: for RHD

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    A56-1 (LGND) - A38-44 (LGND)
    		Always
    		Below 1 Ω
    A56-1 (LGND) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    A56-1 (LGND) - A52-44 (LGND)
    		Always
    		Below 1 Ω
    A56-1 (LGND) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)