How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use Techstream to check if the CAN communication system is functioning normally.

      Result 

      COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM
      
      

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

   B: Go TO  CAN COMMUNICATION SYSTEM 

   A: Go to next step 

4. CHECK FOR DTC* 
   1. Clear the DTC (see DTC CHECK / CLEAR  ).
   2. Recheck for DTC (see DTC CHECK / CLEAR  ).

      Result 

      DTC RESULT CHART
      
      

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

   B: GO TO  DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to next step 

5. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT CHART
   
   

   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. Operation Check (see OPERATION CHECK  ).
   2. Terminals of ECU (see TERMINALS OF ECU  ).
   3. DATA LIST / ACTIVE TEST (see DATA LIST / ACTIVE TEST  ).
7. ADJUST, REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END