DTC    C1A0A    Front Radar Sensor Region Code Mismatch

for Preparation Click here


DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor to detect obstacles in front of the vehicle.
When the millimeter wave radar sensor assembly is replaced with a new one, it acquires the country specification information from the driving support ECU assembly. Also, when the driving support ECU assembly is replaced with a new one, it receives the country specification information from the main body ECU. When the country specification information in the sensor and ECU do not match, DTC C1A0A is output.

DTC No.
DTC Detection Condition
Trouble Area
C1A0A
While power switch is on (IG), country specification information in driving support ECU assembly and front millimeter wave radar sensor do not match for 1 second
  1. Millimeter wave radar sensor assembly
  2. Driving support ECU assembly

INSPECTION PROCEDURE

NOTICE:
When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed (Click here).

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Clear the DTCs.

  1. Enter the following menus: Powertrain / Radar Cruise / Data List / Country# (F Radar Sens).

  1. Read the Data List and check the country specification information of the front millimeter wave radar sensor and vehicle.

    Radar Cruise 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Country# (F Radar Sens)
    		Millimeter wave radar sensor country signal / JPN, NA, EURO, AUS, SAFC, OTHER, TWN
    		Actual country code
    		-

    Result 
    Result
    		Proceed to
    Country specification information for vehicle and millimeter wave radar sensor match
    		A
    Country specification information for vehicle and millimeter wave radar sensor do not match
    		B



B
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY (Click here)
A


2.CHECK WHETHER DTC OUTPUT RECURS (DTC C1A0A)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Clear the DTCs (Click here).

  1. Perform the following to make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the malfunction cannot be detected.

    1. Drive the vehicle at a speed of 50 km/h (30 mph) and 170 km/h (105 mph).

    2. Turn the cruise control switch (ON-OFF button) on.

    3. Push the -/SET switch to activate the cruise control.

  1. Enter the following menus: Powertrain / Radar Cruise / DTC.

  1. Read the DTCs.

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



B
REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)
A

END