- Millimeter wave radar sensor
- Driving support ECU
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJTC |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: PRE-COLLISION: PRE-COLLISION SYSTEM: C1A11,C1A14; Front Radar Sensor Incorrect Axial Gap; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
DTC |
C1A11 |
Front Radar Sensor Incorrect Axial Gap |
|
DTC |
C1A14 |
Front Radar Sensor Beam Axis Not Adjusted |
DESCRIPTION
The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle.
Based on this information, the driving support ECU sends pre-collision control operation signals.
When the vehicle is determined to be driving in a straight line or on a slow curve based on signals from the yaw rate sensor etc., the millimeter wave radar sensor performs a self diagnosis to check if the sensor beam axis is deviated from the vehicle movement direction. When the millimeter wave radar sensor beam axis is deviated, the driving support ECU detects this, and stores DTC C1A11.
After installing a new millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is stored.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1A11 |
When the ignition switch is ON, misalignment of the millimeter wave radar sensor is detected for approximately. 1 second. |
|
|
C1A14 |
When the ignition switch is ON, an unadjusted millimeter wave radar sensor beam axis is detected for approximately. 1 second. |
|
CAUTION / NOTICE / HINT
NOTICE:
When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT](/t3Portal/stylegraphics/info.gif)
).
PROCEDURE
|
1. |
CHECK MILLIMETER WAVE RADAR SENSOR |
(a) Check the millimeter wave radar sensor installation (See page
).
|
|
2. |
ADJUST MILLIMETER WAVE RADAR SENSOR |
(a) Adjust the millimeter wave radar sensor (See page
).
|
|
3. |
CHECK FOR DTC (PRE-COLLISION 2 SYSTEM) |
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
(b) Clear the DTCs (See page
).
(c) Check for DTCs (See page
).
OK:
DTC C1A11 or C1A14 is not output.
| OK |
|
END |
|
|
4. |
REPLACE MILLIMETER WAVE RADAR SENSOR |
(a) Replace the millimeter wave radar sensor (See page
).
|
|
5. |
ADJUST MILLIMETER WAVE RADAR SENSOR |
(a) Adjust the millimeter wave radar sensor (See page
).
|
|
6. |
CHECK FOR DTC (PRE-COLLISION 2 SYSTEM) |
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
(b) Clear the DTCs (See page
).
(c) Check for DTCs (See page
).
OK:
DTC C1A11 or C1A14 is not output.
HINT:
After performing the radar beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the driving support ECU.
| OK |
|
END |
| NG |
|
|
|