How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard: 11 to 14 V 

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

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

      Result 

      RESULT REFERENCE CHART
      
      

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

   B:  GO TO MULTIPLEX NETWORK COMMUNICATION SYSTEM

   A: GO TO Next Step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the intelligent tester to check if the CAN communication system is functioning normally.

      Result 

      RESULT REFERENCE CHART
      
      

      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 

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

      Result 

      RESULT REFERENCE 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 

6. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE 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  8

   A: GO TO Next Step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU (see TERMINALS OF ECU  ).
   2. Data List / Active Test (see DATA LIST / ACTIVE TEST  ).
8. ADJUST, REPAIR OR REPLACE 
9. CONFIRMATION TEST 

   NEXT: END