How To Proceed With: Troubleshooting

HINT:

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

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

   Standard: 

   11 to 14 V 

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

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 

   RESULT
   
   

   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 

   RESULT
   
   

   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 

   RESULT
   
   

   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 (see TERMINALS OF ECU  )
   2. DATA LIST / ACTIVE TEST (see DATA LIST / ACTIVE TEST  )
   3. On-vehicle Inspection (see ON-VEHICLE INSPECTION  ).
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 

   NEXT: END