| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018K3X |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM(w/ Steering Control): U023A; Lost Communication with Front Camera Module; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
U023A |
Lost Communication with Front Camera Module |
DESCRIPTION
When a communication error between the forward recognition camera and the power steering ECU assembly is detected, the forward recognition camera notifies other ECUs and DTC U023A is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U023A |
Lost Communication with Front Camera Module |
When the ignition switch is ON for 2 seconds or more, a communication malfunction between the forward recognition camera and the power steering ECU assembly is detected for 5 seconds or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
- 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 adjustment.
Click here
![2018 - 2020 MY Sienna [11/2017 - ]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)](/t3Portal/stylegraphics/info.gif)
-
The lane departure alert system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
Click here
PROCEDURE
|
1. |
CHECK FOR DTCs (POWER STEERING SYSTEM) |
HINT:
When the lane departure alert system outputs DTC U023A, the power steering system may also output DTC U023A. If DTC U023A is output, perform diagnosis for the power steering system first.
(a) Check for DTCs.
Click here
Chassis > EMPS > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC U023A is not output |
A |
|
DTC U023A is output |
B |
| B |
|
|
|
2. |
CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) |
(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 and wait 7 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U023A is not output |
A |
|
DTC U023A is output |
B |
| A |
|
|
|
3. |
REPLACE FORWARD RECOGNITION CAMERA |
(a) Replace the forward recognition camera.
Click here
(b) Perform forward recognition camera adjustment.
Click here
|
|
4. |
CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM) |
(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 and wait 7 seconds or more.
(c) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U023A is not output |
A |
|
DTC U023A is output |
B |
| A |
|
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
| B |
|
REPLACE POWER STEERING ECU ASSEMBLY (STEERING COLUMN ASSEMBLY) |
|
|