Lane-Keeping Assist System

CRUISE CONTROL: LANE-KEEPING ASSIST SYSTEM: U0122, U0123, U0131, U0293, U1104: Lost Communication with Vehicle Dynamics Control Module
U1104 - Lost Communication with Driving Support ECU

DESCRIPTION





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

PROCEDURE

1. CHECK DTC OUTPUT

(a) Using the Techstream, enter the following menus: All ECUs / Lane Keeping Assist / Trouble Codes.

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

Result:





B -- GO TO CAN COMMUNICATION CIRCUIT How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK CAN COMMUNICATION SYSTEM

(a) Select "CAN Bus Check" from the "System Selection Menu" screen on the Techstream.

(b) Select "Communication Malfunction DTC" from the "CAN Bus Check" screen, and then select "Enter".

OK:

CAN communication is normal.

NG -- GO TO CAN COMMUNICATION CIRCUIT How to Proceed With Troubleshooting
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (LANE RECOGNITION CAMERA SENSOR ASSEMBLY POWER SOURCE)

(a) Disconnect the lane recognition camera sensor assembly connector.





(b) Turn the power switch on (IG).

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

Standard Voltage:





Text in Illustration





(d) Reconnect the recognition camera sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGB CIRCUIT)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (LANE RECOGNITION CAMERA SENSOR ASSEMBLY GND CIRCUIT)

(a) Disconnect the lane recognition camera sensor assembly connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

5. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY

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

(b) Adjust the lane recognition camera assembly Adjustments.

NEXT -- Continue to next step.

6. CHECK DTC OUTPUT

(a) Using the Techstream, enter the following menus: All ECUs / Lane Keeping Assist / Trouble Codes.

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

(c) Turn the power switch off.

(d) Turn the power switch on (IG).

(e) Drive the vehicle and operate lane keeping assist control.

(f) Recheck for DTCs.

OK:

DTC is not output.

NG -- REPLACE DRIVING SUPPORT ECU Removal

OK -- END