Dtc U0235 Lost Communication With Cruise Control Front Distance Range Sensor


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND)

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

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

CHECK DRIVING SUPPORT ECU

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

CHECK FOR DTC

DTC U0235 Lost Communication with Cruise Control Front Distance Range Sensor


DESCRIPTION

The millimeter wave radar sensor assembly and driving support ECU transit the data for the general vehicle control diagnosis function along the communication line. The millimeter wave radar sensor assembly transmits information about the vehicle in front to the driving support ECU.

DTC Code
DTC Detection Condition
Trouble Are
U0235
When the ignition switch is ON, a communication error between the millimeter wave radar sensor assembly and driving support ECU is detected for 1 second.
  1. Harness or connector
  2. Millimeter wave radar sensor assembly
  3. Driving support ECU

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Pre-Crash Safety.Pre-Crash Safety System. Dtc U0235 Lost Communication With Cruise Control Front Distance Range Sensor


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. Confirm that the connector is securely connected, as a partially connected connector may be the cause of this DTC being output.
1.CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Pre-Crash Safety.Pre-Crash Safety System. Dtc U0235 Lost Communication With Cruise Control Front Distance Range Sensor

  1. Disconnect the G119 ECU connector.

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

    Standard Voltage :
    Tester Connection
    		Switch Condition
    		Specified Condition
    G119-30 (B) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Ignition switch off
    		Below 1 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G119-25 (GND) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Driving Support ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Pre-Crash Safety.Pre-Crash Safety System. Dtc U0235 Lost Communication With Cruise Control Front Distance Range Sensor

  1. Disconnect the A15 sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A15-2 (SGND) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Millimeter Wave Radar Sensor Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the G119 ECU connector.

  1. Disconnect the A15 sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G119-16 (LRDD) - A15-3 (LRDD)
    		Always
    		Below 1 Ω
    G119-16 (LRDD) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK DRIVING SUPPORT ECU


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Pre-Crash Safety.Pre-Crash Safety System. Dtc U0235 Lost Communication With Cruise Control Front Distance Range Sensor

  1. Disconnect the A15 sensor connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G119-16 (LRDD) - Body ground
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Component without harness connected
    (Driving Support ECU)


NG
REPLACE DRIVING SUPPORT ECU (LandCruiser RM000002OJO01NX.html)
OK


5.REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

  1. Replace the millimeter wave radar sensor assembly (LandCruiser RM000002MC401LX.html).


NEXT


6.ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

  1. Adjust the millimeter wave radar sensor assembly (LandCruiser RM000000WQG01ZX.html).


NEXT


7.CHECK FOR DTC

  1. Clear the DTCs (LandCruiser RM0000043K500GX.html).

  1. Check for DTCs (LandCruiser RM0000043K500GX.html).

    OK:
    DTC U0235 is not output.


NG
REPLACE DRIVING SUPPORT ECU (LandCruiser RM000002OJO01NX.html)
OK

END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY IS DEFECTIVE)