Lane Departure Alert System

CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM: U1119: Lost Communication with Object Recognition ECU (CAN)
U1119 - Lost Communication with Object Recognition ECU (CAN)

DESCRIPTION

Because of the location of the lane recognition camera assembly, it is subject to high temperatures. If the lane recognition camera sensor assembly becomes too hot, the power source is shut down to protect the system. At that time CAN communication also stops. However, in order to inform the driving support ECU that CAN communication has not stopped because of a CAN communication error, on/off signals are periodically sent from the HITP terminal.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

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

Result





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

2. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - LANE RECOGNITION CAMERA SENSOR)

(a) Disconnect the G43 driving support ECU connector.

(b) Disconnect the W12 lane recognition camera sensor 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 LANE RECOGNITION CAMERA SENSOR ASSEMBLY

(a) Replace the lane recognition camera sensor assembly Removal.

NEXT -- Continue to next step.

4. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY

(a) Adjust the lane recognition camera sensor assembly Adjustments.

NEXT -- Continue to next step.

5. CHECK FOR DTC

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

(b) Perform the following to make sure the DTC detection conditions are met.

HINT
If the detection conditions are not met, the system cannot detect the malfunction.

(1) Drive the vehicle at a speed of 50 km/h (30 mph) or more and operate the lane departure alert system.

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

OK:

DTC U1119 is not output.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END (LANE RECOGNITION CAMERA SENSOR ASSEMBLY IS DEFECTIVE)