LANE-KEEPING ASSIST SYSTEM, Diagnostic DTC:U1119, U1119, U1120

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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.

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INSPECTION PROCEDURE

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PROCEDURE

1. Click here

   READ VALUE USING INTELLIGENT TESTER (OBJECT RECOGNITION ECU)

   
   

   1. Use the Data List to check if the communication with object recognition ECU (Click here).

      Table 1. Radar Cruise

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Communication with Object Recognition ECU	Communication with object recognition ECU signal/AVAIL or FAIL	AVAIL: Communication is normal FAIL: Communication is malfunctioning	-

      Tip:

      As the "Communication with Object Recognition ECU" item monitors the CAN communication condition, distinguishing between a CAN communication malfunction and serial communication malfunction is possible. If a CAN communication malfunction may be present, proceed to the DIAGNOSTIC TROUBLE CODE CHART.

      Table 2. Result

      Result	Proceed to
      "Communication with Object Recognition ECU" is "AVAIL"	A
      "Communication with Object Recognition ECU" is "FAIL" (for LHD)	B
      "Communication with Object Recognition ECU" is "FAIL" (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
2. Click here

   GO TO CAN COMMUNICATION SYSTEMClick here

3. Click here

   REPLACE DRIVING SUPPORT ECUClick here

4. Click here

   CHECK HARNESS AND CONNECTOR (OBJECT RECOGNITION ECU - OBJECT RECOGNITION CAMERA)

   
   
   1. 

      Disconnect the p1 ECU connector.

   2. Disconnect the X17 camera connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition p1-12 (SGND) - X17-12 (SGND) Always Below 1 Ω p1-13 (RX) - X17-14 (TX) Always Below 1 Ω p1-14 (TX) - X17-13 (RX) Always Below 1 Ω p1-13 (RX) - Body ground Always 10 kΩ or higher p1-12 (SGND) - Body ground Always 10 kΩ or higher p1-14 (TX) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

6. Click here

   REPLACE OBJECT RECOGNITION CAMERA

   
   

   1. Replace the object recognition camera (Click here).

   
   
   • NEXTClick here
7. Click here

   ADJUST OBJECT RECOGNITION CAMERA

   
   

   1. Adjust the object recognition camera (Click here).

   
   
   • NEXTClick here
8. Click here

   CHECK FOR DTC

   
   

   1. Clear the DTCs (Click here).

   2. Check for DTCs (Click here).

      OK
      DTC U1119 and U1120 are not output.

   
   
   • OKClick here
   • NGClick here
9. Click here

   END (OBJECT RECOGNITION CAMERA IS DEFECTIVE)

10. Click here

    REPLACE OBJECT RECOGNITION ECU

    
    

    1. Replace the object recognition ECU (Click here).

    
    
    • NEXTClick here
11. Click here

    ADJUST OBJECT RECOGNITION CAMERA

    
    

    1. Adjust the object recognition camera (Click here).

    
    
    • NEXTClick here
12. Click here

    CHECK FOR DTC

    
    

    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

       OK
       DTC U1119 and U1120 are not output.

    
    
    • OKClick here
    • NGClick here
13. Click here

    GO TO CAN COMMUNICATION SYSTEMClick here

14. Click here

    END (OBJECT RECOGNITION ECU IS DEFECTIVE)