How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the lighting system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT BATTERY VOLTAGE 

   Standard

   11 to 14 V

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

   NEXT: Go to next step 

3. CHECK COMMUNICATION FUNCTION LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check if the multiplex communication system (MPX) is functioning normally.
      RESULT
      
      

      Result	Proceed to
      MPX DTC is not output	A
      MPX DTC is output	B

      B → Go to  MULTIPLEX COMMUNICATION SYSTEM  MULTIPLEX NETWORK COMMUNICATION SYSTEM 

      A: Go to next step 

4. 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 DTC is not output	A
      CAN DTC is output	B

      B → Go to  CAN COMMUNICATION SYSTEM  CAN COMMUNICATION SYSTEM 

      A: Go to next step 

5. CHECK FOR DTC* 
   1. Check for DTC.
   2. Clear the DTC.
   3. Recheck the DTC.
      RESULT
      
      

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → Go to  DIAGNOSTIC TROUBLE CODE CHART  DIAGNOSTIC TROUBLE CODE CHART 

      A: Go to next step 

6. 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   8 step 8 

   A: Go to next step 

7. 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 

8. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

9. CONFIRMATION TEST 

   NEXT → END