| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018K3K |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM(w/ Steering Control): C1A73; Driving Support ECU Receive Data Malfunction; 2018 - 2020 MY Sienna [11/2017 - ] | ||
|
DTC |
C1A73 |
Driving Support ECU Receive Data Malfunction |
DESCRIPTION
If a communication error between the driving support ECU assembly and another ECU is detected, DTC C1A73 is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1A73 |
Driving Support ECU Receive Data Malfunction |
2 seconds after the ignition switch is turned to ON, a communication error between the driving support ECU assembly and other ECUs is detected 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)
- When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly 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. As a result, a DTC may be stored.
-
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 (PRE-COLLISION SYSTEM) |
HINT:
The driving support ECU communicates with other ECUs via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.
(a) Check for DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 and U1104 are not output |
A |
|
DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 or U1104 are 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 C1A73 is not output |
A |
|
DTC C1A73 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 C1A73 is not output |
A |
|
DTC C1A73 is output |
B |
| A |
|
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
| B |
|
|
|