How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORK SHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF 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
      
      

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

   B:  GO to MULTIPLEX COMMUNICATION SYSTEM

   A: Go to Next step 

4. CHECK FOR DTC* 

   Result 

   RESULT REFERENCE
   
   

   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 REFERENCE
   
   

   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 

6. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. (see TERMINALS OF ECU  ).
   2. (see DATA LIST / ACTIVE TEST  ).
   3. (see ON-VEHICLE INSPECTION  ).
7. REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END