How To Proceed With Troubleshooting

HINT: 

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

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 

   NEXT: Go to next step 

3. INSPECT BATTERY VOLTAGE 

   Standard

   11 to 14 V

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

   NEXT: Go to next step 

4. INSPECT MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

      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	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	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. Data List/Active Test. Refer to DATA LIST/ACTIVE TEST 
   2. Terminals of ECU. Refer to TERMINALS OF ECU 
   3. Inspection

      NEXT: Go to next step 

8. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

9. CONFIRMATION TEST 

   NEXT → END