Dtc C1A0A Front Radar Sensor Region Code Mismatch

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

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTCs (RADAR CRUISE2)

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

CHECK FOR DTCs (RADAR CRUISE2)

REPLACE DRIVING SUPPORT ECU ASSEMBLY

DTC C1A0A Front Radar Sensor Region Code Mismatch


DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.
Based on this information, the driving support ECU assembly sends dynamic radar cruise control operation signals.
When the destination information in the millimeter wave radar sensor assembly and driving support ECU assembly do not match, DTC C1A0A is stored.

DTC No.
DTC Detection Condition
Trouble Area
C1A0A
When the engine switch is on (IG) and the dynamic radar cruise control system is operating, the destination information in the driving support ECU assembly and millimeter wave radar sensor assembly do not match for approximately 2 seconds or more.
  1. Millimeter wave radar sensor assembly
  2. Driving support ECU assembly

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  2. When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed (Click here).
  3. First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting (Click here).
1.CHECK FOR DTCs (RADAR CRUISE2)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.
    1. Turn the engine switch on (IG).
    2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF).
    3. Wait for 2 seconds or more.

  1. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC C1A0A is output
    		A
    DTC C1A0A is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


2.REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

  1. Replace the millimeter wave radar sensor assembly with a new one (Click here).

  1. Perform millimeter wave radar sensor assembly adjustment (Click here).


NEXT


3.CHECK FOR DTCs (RADAR CRUISE2)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.
    1. Turn the engine switch on (IG).
    2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF).
    3. Wait for 2 seconds or more.

  1. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC C1A0A is output
    		A
    DTC C1A0A is not output
    		B


B
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE)
A


4.REPLACE DRIVING SUPPORT ECU ASSEMBLY

  1. Replace the driving support ECU assembly (Click here).


NEXT

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE)