After installing a new millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is stored.
INSPECTION PROCEDURE
NOTICE:
When the millimeter wave radar sensor is replace with a new one, adjustment of the radar sensor beam axis must be performed
See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Distance Sensor/Adjustments.
PROCEDURE
1. ADJUST MILLIMETER WAVE RADAR SENSOR
(a) Adjust the millimeter wave radar sensor See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist
Systems/Distance Sensor/Adjustments.
NEXT -- Continue to next step.
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
(b) Clear the DTCs See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Pre-Collision System.
(c) Drive the vehicle.
(d) Recheck for DTCs.
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 See: Cruise Control/Cruise Control Module/Service and Repair/Removal
OK -- END
From 08/2009
PRE-COLLISION: PRE-COLLISION SYSTEM: C1A11,C1A14: Front Radar Sensor Incorrect Axial Gap
C1A14 - Front Radar Sensor Beam Axis Not Adjusted
DESCRIPTION
The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle.
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 millimeter wave
radar sensor performs a self diagnosis to check if the sensor beam axis is deviated from the vehicle movement direction. When the millimeter wave
radar sensor beam axis is deviated, the driving support ECU detects this, and stores DTC C1A11.
After installing a new millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is stored.
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