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:

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT DOOR SCUFF PLATE LH (for Double Cab) 2. REMOVE FRONT DOOR SCUFF PLATE LH (for Access Cab) 3. REMOVE COWL SIDE TRIM BOARD LH 4. REMOVE INSTRUMENT CLUSTER CENTER FINISH PANEL SUB-ASSEMBLY 5. REMOVE INSTRUMENT CLUSTER FINISH PANEL ASSEMBLY 6. ...

Check Mode Procedure
CHECK MODE PROCEDURE 1. DESCRIPTION (a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic. ...

Center Airbag Sensor Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Center Airbag Sensor Communication Stop Mode Either condition is met: Communication stop for "Airbag" is indicated on the "Communication Bus Check" sc ...