Toyota Tacoma (2015-2018) Service Manual: Front Radar Sensor Beam Axis Not Adjusted (C1A14)

Toyota Tacoma (2015-2018) Service Manual / Pre-collision / Pre-collision System / Front Radar Sensor Beam Axis Not Adjusted (C1A14)

DESCRIPTION

After installing a new millimeter wave radar sensor assembly, if sensor beam axis adjustment has not been performed, DTC C1A14 will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A14	Front Radar Sensor Beam Axis Not Adjusted	When the vehicle is being driven at a speed of 10 km/h (7 mph) or more, incompletion of millimeter wave radar sensor assembly beam axis alignment is detected for approximately 1 second or more.	Millimeter wave radar sensor assembly adjustment has not been performed or has not been completed normally Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

NOTICE:

When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
If the millimeter wave radar sensor assembly has been replaced, be sure to perform millimeter wave radar sensor assembly adjustment.
Click here

PROCEDURE

1.	ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Perform millimeter wave radar sensor assembly adjustment.

Click here

2.	CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Click here (b) Make sure that the DTC detection conditions are met.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

Click here

Result	Proceed to
DTC C1A14 is not output	A
DTC C1A14 is output	B

END (SENSOR BEAM AXIS ADJUSTMENT WAS NOT COMPLETED)

3.	REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Replace the millimeter wave radar sensor assembly.

Click here (b) Adjust the millimeter wave radar sensor assembly.

(b) Adjust the millimeter wave radar sensor assembly.

Click here

4.	CLEAR DTC (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

Click here

END

Front Radar Sensor Incorrect Axial Gap (C1A11)

DESCRIPTION When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate sensor, etc., the millimeter wave radar sensor assembly perfor ...

Yaw Rate Sensor (C1A46)

DESCRIPTION If the millimeter wave radar sensor assembly receives a yaw rate sensor malfunction signal from the yaw rate sensor (airbag sensor assembly) or yaw rate sensor zero point malfunction ...

Other materials:

Precaution
PRECAUTION IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) Engine Swi ...

Installation
INSTALLATION PROCEDURE 1. INSTALL CENTER STOP LIGHT ASSEMBLY (for Bulb Type Stop Light) (a) Install the 3 center stop light bulbs to the 3 center stop light sockets. (b) Turn the 3 center stop light sockets with 3 center stop light bulbs in the direction indicated by the arrow sho ...

Front Airbag Sensor LH Circuit Malfunction (B1615/14)
DESCRIPTION The front airbag sensor LH consists of parts such as the diagnostic circuit and the frontal detection sensor. When the airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether or not the SRS should be activated. DTC B1615/14 is set when a ...