Pre-Collision System (w/o Driver Monitor Camera)

PRE-COLLISION: PRE-COLLISION SYSTEM (w/o Driver Monitor Camera): C1A11, C1A14: Front Radar Sensor Incorrect Axial Gap
C1A14 - Front Radar Sensor Beam Axis Not Adjusted

DESCRIPTION

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.





INSPECTION PROCEDURE

PROCEDURE

1. ADJUST FRONT MILLIMETER WAVE RADAR SENSOR

(a) Adjust the front millimeter wave radar sensor Adjustments.

NEXT -- Continue to next step.

2. CHECK DRIVING SUPPORT ECU

(a) Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Code /

(b) Select "Clear" and clear the data.

(c) Recheck for DTC.

OK:

DTC C1A11 or C1A14 is not output.

HINT
After performing the radar beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the driving support ECU.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END