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 ELECTRIC POWER CONTROL SYSTEM* 
   1. Using the Techstream, check the electric power control system's load control history (see OPERATION CHECK ).
4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check that the CAN communication system is functioning normally.

      Result 

      RESULT REFERENCE CHART
      
      

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

      B: Go to CAN COMMUNICATION SYSTEM  (see HOW TO PROCEED WITH TROUBLESHOOTING )

      A: Go to Next Step 

5. PROBLEM SYMPTOMS TABLE 
   1. Refer to the 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  7

      A: Go to Next Step 

6. 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  )
   4. Inspection
7. REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END