How To Proceed With Troubleshooting

HINT: 

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

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT BATTERY VOLTAGE 

   Standard voltage

   11 to 14 V

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

   NEXT: Go to next step 

3. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check that 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 APPRPRIATE MULTIPLEX COMMUNICATION SERVICE INFORMATION 

      A: Go to next step 

4. PROBLEM SYMPTOMS TABLE 
   RESULT
   
   

   Result	Proceed to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B → Go to step   6 . 

   A: Go to next step 

5. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU
   2. Data List / Active Test
   3. On-vehicle Inspection
   4. Inspection

      NEXT: Go to next step 

6. REPAIR OR REPLACE 

   NEXT: Go to next step 

7. CONFIRMATION TEST 

   NEXT → END