Toyota Tacoma 2015-2018 Service Manual: Front Radar Sensor Region Code Mismatch (C1A0A)
DESCRIPTION
When the destination information in the millimeter wave radar sensor assembly and forward recognition camera do not match, DTC C1A0A is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
|---|---|---|---|---|
|
C1A0A |
Front Radar Sensor Region Code Mismatch |
When the ignition switch is ON and the dynamic radar cruise control system is operating, the destination information in the forward recognition camera and millimeter wave radar sensor assembly do not match for approximately 1.3 seconds or more. |
|
Does not come on |
CAUTION / NOTICE / HINT
NOTICE:
- Check that the millimeter wave radar sensor assembly has not been replaced with one from another vehicle.
- When replacing the millimeter wave radar sensor assembly, make sure to replace it with a new one. If a device 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, and as a result, a DTC may be stored.
- When the millimeter wave radar sensor assembly is replaced with a new
one, adjustment of the radar sensor beam axis must be performed.
Click here
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- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
- If the forward recognition camera has been replaced with a new one,
be sure to perform Forward Recognition Camera Learning.
Click here
- First check the CAN communication system by following How to Proceed
with Troubleshooting. After checking that there are no malfunctions in the
CAN communication system, proceed with troubleshooting.
Click here
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Perform the following procedure.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Turn the ignition switch to ON.
- Turn the dynamic radar cruise control system on using the cruise control main switch.
- Wait for 2 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC C1A0A is not output |
A |
|
DTC C1A0A is output |
B |
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
|
.gif)
|
2. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
Click here
(b) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
|
3. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Perform the following procedure.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Turn the ignition switch to ON.
- Turn the dynamic radar cruise control system on using the cruise control main switch.
- Wait for 2 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC C1A0A is not output |
A |
|
DTC C1A0A is output |
B |
| A | |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
|
|
4. |
REPLACE FORWARD RECOGNITION CAMERA |
(a) Replace the forward recognition camera with a new one.
Click here
(b) Perform forward recognition camera adjustment.
Click here
| NEXT | |
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
Front Radar Sensor Incorrect Axial Gap (C1A11,C1A14)
DESCRIPTION
When the system determines that the vehicle is driving straight ahead based on
signals from the yaw rate and acceleration sensor (airbag sensor assembly), etc.,
the millimeter wave ra ...
Vehicle Information Not Obtained (C1A02)
DESCRIPTION
When a new millimeter wave radar sensor assembly is installed, it receives vehicle
specification information (destination, steering wheel position, 2WD or 4WD, etc.)
from the main bod ...
Other materials:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is displayed during the DTC check, inspect the trouble area
for that code. For details of each code, refer to the relevant page listed under
respective "See page" in the DTC chart.
Tire Pressure Warning ECU and Receiver
...
Reassembly
REASSEMBLY
PROCEDURE
1. INSTALL INSTRUMENT PANEL CUSHION
(a) Install a new instrument panel cushion as shown in the illustration.
Text in Illustration
*a
R End
*b
25 to 45 mm
(0.984 to 1.772 in.)
...
Event data recorder
This vehicle is equipped with an event data recorder (EDR). The main purpose
of an EDR is to record, in certain crash or near crash-like situations, such as
an air bag deployment or hitting a road obstacle, data that will assist in understanding
how a vehicle’s systems performed. The EDR is ...