Toyota Tacoma 2015-2018 Service Manual: 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 performs self diagnosis to check if the sensor beam axis has deviated. If the millimeter wave radar sensor assembly beam axis has deviated, the millimeter wave radar sensor assembly detects this and stores DTC C1A11.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1A11 |
Front Radar Sensor Incorrect Axial Gap |
When the ignition switch is ON, misalignment of the millimeter wave radar sensor assembly is detected for approximately 1 second or more. |
|
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
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PROCEDURE
|
1. |
CHECK VEHICLE CONDITION |
(a) Check the operating conditions of the vehicle.
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is temporarily misaligned due to the vehicle being overloaded.
|
Result |
Proceed to |
|---|---|
|
Vehicle is not overloaded or has not been towed |
A |
|
Vehicle is overloaded or has been towed |
B |
| B | .gif) |
GO TO STEP 9 |
|
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|
2. |
CHECK WHEEL ALIGNMENT |
(a) Check the wheel alignment (toe).
Click here
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect wheel alignment (toe).
|
Result |
Proceed to |
|---|---|
|
Wheel is misaligned (toe) |
A |
|
Wheels are not misaligned (toe) |
B |
| B | |
GO TO STEP 6 |
|
|
3. |
ADJUST WHEEL ALIGNMENT |
(a) Adjust the alignment (toe) of the wheels.
Click here
|
|
4. |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
|
5. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC C1A11 is not output |
A |
|
DTC C1A11 is output |
B |
| A | |
END |
| B | |
GO TO STEP 7 |
|
6. |
INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Check that the bracket of the millimeter wave radar sensor assembly is not deformed.
HINT:
If the bracket is deformed, replace the millimeter wave radar sensor assembly.
OK:
The bracket is not deformed.
| OK | |
GO TO STEP 4 |
| NG | |
GO TO STEP 7 |
|
7. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
Click here
(b) Adjust the millimeter wave radar sensor assembly.
Click here
|
|
8. |
CLEAR DTC (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
| NEXT | |
END |
|
9. |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Return the vehicle to normal.
(b) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
|
10. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC C1A11 is not output |
A |
|
DTC C1A11 is output |
B |
| A | |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS MISALIGNED DUE TO THE VEHICLE BEING OVERLOADED OR TOWED) |
|
|
11. |
CHECK WHEEL ALIGNMENT |
(a) Check the wheel alignment (toe).
Click here
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect wheel alignment (toe).
|
Result |
Proceed to |
|---|---|
|
Wheel is misaligned (toe) |
A |
|
Wheels are not misaligned (toe) |
B |
| A | |
GO TO STEP 3 |
| B | |
GO TO STEP 7 |
Steering Angle Sensor (C1A47)
DESCRIPTION
The millimeter wave radar sensor assembly receives steering angle information
from the steering angle sensor (spiral cable with sensor sub-assembly). If the millimeter
wave radar sens ...
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 I ...
Other materials:
Inspection
INSPECTION
PROCEDURE
1. INSPECT INPUT SHAFT
(a) Using a dial indicator and 2 V-blocks, measure the shaft runout.
Maximum runout:
0.03 mm (0.0012 in.)
If the runout is more than the maximum, replace the input shaft.
HINT:
Measure the 3 areas shown in the illustration wit ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL TRANSFER POSITION SWITCH (for 4WD)
Click here
2. INSTALL ENGINE SWITCH
Click here
3. INSTALL AIR CONDITIONING CONTROL ASSEMBLY
(a) Connect the connectors.
(b) Engage the 8 clips to install the air conditioning control assembly.
4. INSTALL RADIO AND DISP ...
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
...
