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 engine switch is turned on (IG), a communication
error between the driving support ECU assembly and other ECUs is
detected 5 seconds or more. |
- CAN communication system
- Forward recognition camera
- Pre-collision system
| 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.
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- The lane departure alert system (w/ steering control) uses the CAN
communication system. First, confirm that there are no malfunctions in
the CAN communication system. Refer to How to Proceed with
Troubleshooting.
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PROCEDURE 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. Body Electrical > Pre-Collision 2 > Trouble Codes
|
Result | Proceed to | |
DTC U0100, U0125, U0126, U0129, U0155, U0235, U023A, U1002 and U1104 are not output |
A | | DTC U0100, U0125, U0126, U0129, U0155, U0235, U023A, U1002 or U1104 are output |
B |
| B |
 | GO TO PRE-COLLISION SYSTEM |
|
A |
 | |
(a) Clear the DTCs. Chassis > LKA/LDA > Clear DTCs
(b) Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs. Chassis > LKA/LDA > Trouble Codes
|
Result | Proceed to | |
DTC C1A73 is not output |
A | | DTC C1A73 is output |
B |
| A |
| USE SIMULATION METHOD TO CHECK |
| B |
| REPLACE FORWARD RECOGNITION CAMERA | |
