How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
   • GO TO NEXT STEP 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 
   • GO TO NEXT STEP 
3. INSPECT BATTERY VOLTAGE 

   Standard: 11 to 14 V 

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

   • GO TO NEXT STEP 
4. INSPECT 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 

      COMMUNICATION FUNCTION LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)
      
      

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

      • B: Go to step   8 
      • A: GO TO NEXT STEP 
5. CHECK FOR DTC* 

   Result 

   DTC
   
   

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

   • B: Go to step   8 
   • A: GO TO NEXT STEP 
6. PROBLEM SYMPTOMS TABLE 

   Result 

   PROBLEM SYMPTOMS TABLE
   
   

   Result	Proceed to
   If fault is not listed in problem symptoms table	A
   If 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 
   2. DATA LIST/ACTIVE TEST 
   3. ON-VEHICLE INSPECTION 
   • GO TO NEXT STEP 
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 
   • END