Lane-Keeping Assist System

CRUISE CONTROL: LANE-KEEPING ASSIST SYSTEM: U1119, U1119, U1120: Lost Communication with Object Recognition ECU (CAN)
U1120 - Lost Communication with Object Recognition Camera

DESCRIPTION

When a serial communication stop between the object recognition ECU and object recognition camera is detected, DTCs U1119 and U1120 are output.

When a CAN communication stop between the object recognition ECU and driving support ECU is detected, DTC U1119 is output.

When CAN communication from the object recognition ECU to the driving support ECU stops, DTC U1119 is output.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Use the Data List to check if the communication with object recognition ECU Scan Tool Testing and Procedures.

Radar Cruise





Result





B -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (OBJECT RECOGNITION ECU - OBJECT RECOGNITION CAMERA SENSOR)

(a) Disconnect the g1 ECU connector.





(b) Disconnect the X18 camera connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE OBJECT RECOGNITION CAMERA

(a) Replace the object recognition camera Removal.

NEXT -- Continue to next step.

4. ADJUST OBJECT RECOGNITION CAMERA

(a) Adjust the object recognition camera Adjustments.

NEXT -- Continue to next step.

5. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC U1119 and U1120 are not output.

NG -- REPLACE OBJECT RECOGNITION ECU

OK -- END (OBJECT RECOGNITION CAMERA IS DEFECTIVE)

6. REPLACE OBJECT RECOGNITION ECU

(a) Replace the object recognition ECU Removal.

NEXT -- Continue to next step.

7. ADJUST OBJECT RECOGNITION CAMERA

(a) Adjust the object recognition camera Adjustments.

NEXT -- Continue to next step.

8. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC U1119 and U1120 are not output.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END (OBJECT RECOGNITION ECU IS DEFECTIVE)