C1A11 - Pre-Collision System

DTC C1A11 Front Radar Sensor Incorrect Axial Gap
DTC C1A14 Front Radar Sensor Beam Axis Not Adjusted

DESCRIPTION

DTC Detection Condition:

The driving support ECU uses the front millimeter wave radar sensor to detect obstacles in front of and behind the vehicle, and detect the direction that the driver's head is facing. Based on this information, the driving support ECU sends pre-collision control operation signals.

When the vehicle is determined to be driving in a straight line or on a slow curve based on signals from the yaw rate sensor, etc., the front millimeter wave radar sensor assembly performs a self diagnosis to check if the sensor beam axis is deviated from the vehicle movement direction. When the front millimeter wave radar sensor assembly's beam axis is deviated, the driving support ECU detects this, and outputs DTC C1A11.

After installing a new front millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is output.

This DTC is also output from the dynamic radar cruise control system.

Step 1-2:

Step 2 (Continued):

INSPECTION PROCEDURE