How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
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. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT REFERENCE CHART
      
      

      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. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE CHART
   
   

   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. See TERMINALS OF ECU  .
   2. See DATA LIST / ACTIVE TEST  .
   3. See ON-VEHICLE INSPECTION  .
6. ADJUST, REPAIR OR REPLACE 
7. CONFIRMATION TEST 

   NEXT: END