How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the lane-keeping assist system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT AUXILIARY BATTERY VOLTAGE 
   1. Measure the auxiliary battery voltage with the power switch off.

      Standard voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.

      NEXT: Go to next step 

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN Communication System is functioning normally.
      RESULT
      
      

      Result	Proceed to
      CAN communication system DTC is not output	A
      CAN communication system DTC is output	B

      B → Go to CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

4. CHECK FOR DTC* 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .
   2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
   3. Recheck for DTCs. Refer to DTC CHECK / CLEAR .
      RESULT
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

      B → Go to step 7 

      A: Go to next step 

5. PROBLEM SYMPTOMS TABLE 
   1. Problem symptoms table. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT
      
      

      Result	Proceed to
      Fault is not listed in problem symptoms table	A
      Fault is listed in problem symptoms table	B

      B → Go to step 7 

      A: Go to next step 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU. Refer to TERMINALS OF ECU .
   2. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST .

      NEXT: Go to next step 

7. REPAIR OR REPLACE 

   NEXT: Go to next step 

8. CONFIRMATION TEST 

   NEXT → END