- Millimeter wave radar sensor assembly
- Driving support ECU assembly
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018WRU |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: C1A0A; Front Radar Sensor Region Code Mismatch; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
C1A0A |
Front Radar Sensor Region Code Mismatch |
DESCRIPTION
The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle.
When the destination information in the millimeter wave radar sensor assembly and driving support ECU assembly do not match, DTC C1A0A is stored.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
MIL |
|---|---|---|---|
|
C1A0A |
When the ignition switch is ON and the dynamic radar cruise control system is operating, the destination information in the driving support ECU assembly 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 driving support ECU 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 driving support ECU 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
![2018 - 2020 MY Sienna [11/2017 - ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT](/t3Portal/stylegraphics/info.gif)
-
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 (RADAR CRUISE 2) |
(a) Clear the DTCs.
Click here
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the following conditions are not met, the system cannot detect the malfunction.
- Turn the ignition switch to ON.
- Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
- 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 |
|
|
|
2. |
REPLACE DRIVING SUPPORT ECU ASSEMBLY |
(a) Replace the driving support ECU assembly.
Click here
|
Proceed to |
|---|
|
NEXT |
|
|
3. |
CHECK FOR DTC (RADAR CRUISE 2) |
(a) Clear the DTCs.
Click here
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the following conditions are not met, the system cannot detect the malfunction.
- Turn the ignition switch to ON.
- Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
- 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 (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) |
|
|
4. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly with a new one.
Click here
(b) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
Proceed to |
|---|
|
NEXT |
| NEXT |
|
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
|
|